Holley Super Sniper 1250 Honest Installation Review
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- Опубликовано: 22 авг 2024
- Check out the (NEW) Holley Sniper EFI 2 system here: holley-team.co...
The new system features all the original features plus enhanced driver feel and NEW improved ECU! Good for 650hp NA
The 1250 Super Sniper EFI from Holley is finally installed. Here’s an honest review of the install including 3-4 things I’d fix but why you should ultimately consider this for your next car or truck project.
if you call holley they will send you a different sensor at no charge. Also in the v4 software you can put a offset in for the sensor to make it read correct. If you put the sensor in the head it will read high.
It should be located in the intake. Also play around with the software and you don't need the linkage.
you can tune out all the problems you are having. i have the same system on a 69 camaro and had the same issues. after playing with the software it runs like a new car. mine has been trouble free for the last 3 years.
The Sniper EFI should be engineered to use the standard fuel lines, fuel pump and float level fuel system while using only a pulse fuel injector controlled electronically. That would reduce the installation hassle to the oxygen sensor, the throttle body EFI and the display/computer. That would encourage more people to do the conversion.
Good info and clearly delivered. Bought a 74 Challenger a year ago and guy threw in Sniper EFI that he could not figure out (that's what he told me anyway). I guess he pulled it off and stuck his 4-barrel back on. I dug through 4-5 boxes as he scattered the stuff in a bunch of boxes and it appears to be all there minus a temp sensor. I am currently installing it after doing a ton of rust repair. Videos like yours are really super helpful in helping avoid a few "gotchyas"! Thanks for posting.
I just watched your video, I installed the Sniper 4150 on my '70 GTO and the only issue I had was the external pump (pure junk) and the coolant sensor reading too high. I replaced the external pump with an in-tank unit and didn't do anything about the CTS, now that I have the part number I'm gonna change it out, thanks for that number. I fabricated the throttle linkage and I'm happy with that. I tried the progressive linkage and even after changing the the ECU to where mine opened (41%), it ran like shit, so I went back to a 1 to 1 linkage and extended it, the car runs great now. Good video dude.
I just installed my tank last week. Just wanted to say that the instructions call for the Aviation Form a gasket on the gasket and NOT the fitting threads. Maybe the instructions got updated but mine says to use a fuel proof thread sealant. I got Permatex 5735 Lock and Seal which is fuel safe. Haven’t run it yet. Good video.
I appreciate the info . On another video you mentioned the Alternator, with the dual fans ( my same setup) I looked back, my Alt is a 100 amp 😣 , I honestly wouldn’t have even thought about it , great content, I’m a GM guy but I’m working on my 85 F150 408 stroker 4speed AOD 2 WD
I'm interested in using the Holley Sniper System on my son's project car. This video was fantastic, informative and even entertaining. You know your stuff too - much appreciated.
Glad you enjoyed it and thank you for watching
OUTSTANDING video....right to the point no stupid intro and very informative
shane ballman thanks! I need to get around to making a followup video after owning the kit for over a year. Ive had a few small items fail, made some improvements, etc. Overall its a solid system for a mildly notified car.
I had a ‘81 suburban 1/2 ton 4x4 back in the day…it had a black goodwrench 290hp replacement motor in it ……other than 33” tires it was stock with the garbage quadrajunk carb….this was back in the late 90’s before we had these fancy efi bolt on kits….even then the guys at work were amazed when id have my cuzzin place bets that the big beast could do doughnuts on dry asphalt…..you should have seen the look on there faces when that big ol thing came around on the 2nd rotation and got all that mass swinging….man that truck was fun and NEVER left me stranded, too bad some tweakers stole it…..few years later i had a ‘86 3/4 ton 4x4 and there was no comparision that thing was junk it had a 350/th400 combo as opossed to the 350/th350 combo in the ‘81….i really miss that ‘81 though….i ended up donating the ‘86 for a tax write off..soon after i gotta ‘72 c/10 longbed fleetside…350/th350 combo…did all the bolt ons and put loud ass headers and dual glasspacks , rims, chrome,chrome, and more chrome…once again the tweakers stole it on a loud stormy rainy night…they must have pushed it down the street some distance before they started it and drove off…..about a week later i gotta call from the police dept. saying they found it stripped down to the hubs in knee deep sand….the tow truck got stuck trying to recover it and they had to get a second one out there to assist and get them both out…then had the nerve to try and charge me for 2 recovery vehicles upon release at the tow yard…wtf….needless to say i had spare steel wheels/tires and tinwork /carb for the motor, got hef running in the tow yard hours later and drove it outta there…it wasnt the same, with the valve covers being stolen sand had gotten into the motor and caused it to smoke like crazy…in short the truck had been violated in a major way…i ended up selling it to a father/daughter team as a project and she was thrilled when i started it for them and she heard how loud it was…..shortly after i got another c/10 longbed fleetside this time a ‘68 327/th350, at this time LS swaps were a thing and i ended up pulling the 327 and selling it as a whole running motor locally for $400, mind you i bought the truck for $1000 so at this point im winning, put an ASA cammed 5.3 in with 4.8 flat tops and a 3000stall converter for the th350 with the 3.73 rear that truck was a rocket, put dual glasspacks on to piss off the nieghbors and that it did, enjoyed it for about a year but my wife had a cow every time i started it cause the windows on the house would rattle and she sensed the nieghbors hated it cause it was loud and obnoixious looking….so i took the hint and sold it for a nice little profit….2years later i was surfin craigslist and found jackpot…a ‘73 c/10 shortbed fleetside straight 6 with granny 4 spd non running…he wanted $5k….i went to go see it and pointed out EVERY flaw…i got him down to $3500…..and he even trailered it home for me….not even 1 week later i had a built LS installed and running with a 3000 stalled th350 in it with the factory 3.73 rear this thing was a missle…i replaced the hood ,doors, and fenders with new pieces and currently in final stages of prep for paint… not to mention i added a vortech v-3sci centrifugal supercharger……its in primer now and ready for paint …i plan on keeping this one only cause the value on shortbed c/10’s is ridiculous….its ran by a holley terminator x just like my 370” lq9/ls3 headed LSA supercharged nova…im building a 408 stroker for the nova and when thats done the 370” will go into the c/10……fun fun fun….cant go wrong with a chevy truck…my daily is a LMM duramax lifted 9” on 37”s…and with only a tune it will smoke most cars on the road
I have installed 3 black Holley sniper units. All 3 were replaced because of the same issue. They sprayed the black powder coating inside of the unit. the easiest way to see is to take off the left side cap that the return fuel line connects to. then pull out the diaphragm that's behind it. You will see it has black powder coating inside of it where it is exposed to gas and it will peel. 2 of the 3 just wouldn't run after the screen on the diaphragm clogged the 3rd saw fuel pressure issues and just went WOT on me with zero throttle control, that was scary. If you have a black unit check that out, Holley replaced all mine with a brand new one but they send out a new one with the same issue. I would recommend not getting powder coated units for replacement.
Thank you , your information about the throttle plates and a stick shift , I had a MSD EFI and it did the same thing very jumpy when shifting .
Happy to see another square body guy with a sniper efi
I put a Sniper on my 66 Mustang. I threw it in the trash four months later. It WILL leave you stranded at some point. Left me stranded twice. No carburetor has ever left me stranded in 30 years. I went back to proven technology: Autolite 4100!
Interesting. Did you ever find out what was the main cause? Ive had a coolant temp sensor go bad which caused it to run pig rich until i swapped it. I also had a TPS go on me. Otherwise its been pretty solid. You definitely
Have a point though. A carburetor is pretty simple and if tuned/maintained properly has a low likelihood of failure
@@truckandroll989 I'm not really sure. I usually work on the Mustang, but this was a big deal, so I had a shop install it. The first time it died, I think there was an electrical issue. The battery died, and then the alternator died. The second time was a fuel sending issue. It wasn't getting fuel. I converted everything back over, and haven't looked back!
@@jaco5187 yea thats frustrating. I know when i added electric fans it was too much for my stock alternator. I wonder if it was a charging issue? I also had to install a diode otherwise it would back feed the alternator and the truck would keep running after i turned it off!!
@@truckandroll989 Well, point is, I don't trust this system. I always have this fear it'll crap out on me at the most inconvenient time. I can't go on a 300 mile drive and be stranded. A carb would never do that to me.
Gasoila works well for sealing fuel NPT fittings. That's what we use on gas pump fittings at gas stations.
Jason Beaulieu that’s good to know I’ll have to check it out
Im a Holley guy, their carbs are simple to me. I've had 3 vehicles and I've always stuck a holley on them, and was happy.
But for EFI, I think im going with Edlebrock. I've only heard good things and they've been doing this for over 30yrs at this point.
Good video though. And thanks for info the remedies.
I been looking at options for my 4 bbl swap.and alot of issues out there especially with Holly even on there carbs the demon.,street avenger man ......
@@TheThirdWheel618 dude, spend the 300 or so and get a wide band o2 sensor. Once you see what your carb is doing, you'll unleash horses you never thought you had.
I called holley and told them that my jets are way outta whatever they recommend, but it's running better... is that an issue?
They asked if I had an o2 sensor and Guage, and when I said yes, his reply was
"Well, in that case, you can actually see what your engine is doing from the jets you've got... the engine is gonna want whatever it wants."
@@munzeez21 ??
I have a AEM wideband 390 FE 69 F250 comp 265 DEH Patriot headers with a little 350 cfm 2bbl 275 HP gear vendor overdrive installed I'm planning on changing to a 4bbl or EFi although alot of the new Holly's are having issues the demon has a pump issue the street avenger has a throttle shaft issue some Edelbrocks as well .
Just getting info that's all also there are some at Holly that don't know what there taking about I called them before and couldn't believe what the guy was telling me .
@@TheThirdWheel618 I'm favoring the edlebrock efi, the blue tooth to the phone is more favorable than a cord and monitor. Good luck on your build though.
@@munzeez21 thanks 👍 I'm looking as well I might follow look into Edelbrock
Bud your a champ. Please keep making videos. Honest and real. New subscriber for sure
Tanner Meaden i really appreciate the positive feedback. Trust me im trying to keep more coming
1. FYI; I did an LS swap with 5.3L stock temp sensor and i havent checked like you did but MINE seems to run very hot before my electric fans kick in
2. even my moms 2015 Suburu outback auto tranny engine has this problem, I ABSOLUTELY HATE driving her car around especially just short trips to give step dads dog a ride, hes slip sliding and flopping everywhere cuz i can be soft enough on take offf.
3. i was able to reuse my throttle cable bracket
4. also had similar retrun line fuel leaks, couldve used this stuff
Thank you so much man. This helps so much. I’ve been planning to get a Holley Sniper for a while and this added info will result in much less headache. Truly thank you 🙌🏼
Thanks for the honest review, mine gets delivered today 😬😬
Hi I just removed my holley demon after 10years been a awesome carb which was running wet plate nos 150hp shot
And have installed snipper 8 still run nos plate but now dry shot.... The snipper takes care of the fuel
These snippers are neat little efi system
Reason I went snipper is Australia fuel is crap.... But the snipper can handle E85 really well.... As before I run avgas but now illegal on race tracks here in Aussie
We had to connect the laptop for a bit of fine tuning but runs awesome on the track and drives very lean on cruize
And later hope to boost some neat HP figuers out of this snipper...... 351windsor....
Cheers
Thanks for sharing your experience with us. Helpful and time saving for me.
Stanley Rayborn glad i could help. Ill do a similar one with my top end kit install
yeah im probably going back to a carb. i have the edelbrock estreet efi on a pontiac 428 and its good never gave me any serious problems. its been a few years. the only problems were a leaking fuel pressure sensor and header flange gasket soon as i figured that out it ran real good. but i cant get it to idle below 900 rpm. tried everything i can think of. set the throttle stop below 900 and then it wil hunt continually and there are no vac leaks. possible bad throttle pos sensor. the tablet it comes with is cool but its bluetooth and the comp doesnt have enough signal strength to pick up from inside the car. so theres also that. i think ill just put the 850 back on it. so much simpler
Thought about getting one of these for my 1970 duster 340, but I think I'll just stick with my carburetor
Ford guy here. That's for the review. Buying for my Fastback with a 5spd and sbf. Good to know about the throttle settings.
Dan Lyons glad I could help!
awesome build mate cant wait for ur next videos!! thanks for posting from australia!! give the 454 some love!!
Thanks Mate. Very helpful.. A few things though, how did you find the flat spots with the sniper as opposed to the mechanical? was it a consistant torque range also? Id like to put it on an xy utility. I know your in the states so you may have to google that... Thanks again
Hey Tim i want to make sure i understand your question. When you say flat spots do you mean the point where the secondary throttle blades start opening when the Sniper is setup to use a progressive linkage?
Awesome video. Just subscribed. Planning my sniper install for next month.
great video. Im looking into the sniper system now. 1. did you use the supplied regulator on the holley system or are you running a stand alone regulator. 2. did you have any issues running this system on a dual plane intake?
Thanks
Thanks for watching! Yes i used the supplied regulator and had no issues. I do not have a standalone. So no issues with the dual plane per se but i get some whistling noises that im told could be solved by using a 4 hole spacer. I have wideband oxygen sensors in each exhaust collector and i do see some variation between the sides. Im not sure if that is just the nature of the system/my motor or the intake but it really hasn’t caused an issue
That ignition system looks like a pain in the ass to install. I just watched the Holley video on it.
My only problem is no body tells the price. I would love to have a set up like that on my roadrunner. Also what is the horse power it will go up to. The video is great keep up the good work and the hammer down
Tony there are various models of the Holley Sniper depending on your power level, whether you plan to supercharger/turbocharge, nitrous etc. The super sniper currently retails for $1500. In addition you will need the fuel system to support it. As far as power goes you wont necessarily gain hp with EFI but it should (if properly setup) increase drive-ability, cold start performance, fuel mileage, etc.
I plan on getting this setup for a Chrysler LA stroker..... wouldn’t mind doing a blow through later.
Thinking about doing this to a Mopar RB stroked 400 in my classic. I'm on the fence as to a few things on how to hook a Sniper Stealth 4150 up to mine
The Holley super sniper 1250 is roughly $1,500, the hyperspark distributor set is about $500
getting excited to be installing my holley super sniper soon. videos like this are super helpful. the do's, don't, and gotcha's experienced in real life installation.. thanks man.. sub'd.
callofgeorge i appreciate it! One more bit of advice (i havent had a chance to make a video) but if you add an extender on your throttle linkage it will allow you to open all 4 butterflies at once but reduce the pedal effort/sticking you experience without it. Holley makes an extension linkage for the Sniper or you can drill a few holes in a piece of thin steel and make your own with some 1/4-28 bolts + nuts
@@truckandroll989 got a part number for the holley one so i can see what it looks like. i just ordered the linkage, then watched the other video where you show the pro-adjustable linkage, so I'm about to cancel and re-order lol..
callofgeorge so i actually never wound up installing the fully adjustable one. The truck seems to run stronger with the fixed linkage and custom extension but from a purely drivability standpoint adjustable might be better
@@truckandroll989 cool cool. mine will be mainly a street car, but may see some track or autocross here and there.
Im no expert, but it appears that you used an AN fitting for your fuel line and screwed it into a brass NPT fitting. Could've been where your leak came from.
i ran into the same goofy daily driving and after talking to holley and going back switching intakes to a torker 2 ... back on dyno it made all most 60 more hp and ran perfect on the street. small 355 roller cam 520 lift 420 hp to tires and my tuner told me from the start it might be a little big on the cfm side 870 is more like a bigblock or 500hp+
Thanks for the honest review!
I just Subscribed . Well done video. If you keep up the good work and effort on future videos ,im sure you will do well. I watched due to thinking of getting this unit for my mopar. Will this unit except nitrous. ? Anyway keep up the great videos . Will look forward to seeing more.
Jody Boyce thanks for the positive support i really appreciate it. Yes the Super Sniper will
Accept nitrous. I believe you can tune it to retard timing when the nitrous is engaged!
Would you recommend the in tank pump no matter what? I’ve already ordered the kit with the in-line pump and just wanted to see if this system will work well for for my truck. If I can save pulling the bed or dropping the tank I’d like to but if it’s going to improve the functionality that much I’ll do it. What’s your thoughts?
The reduction in headache installing an inline pump is pretty huge. Id say if you already ordered it just make sure you mounted it in a spot where it always has suction, is away from heat, properly grounded, and a large enough cable to power it. Do all that and im sure it will work great for you. O and dont forget filters :)
Great video, I have most of the same issues. 1970 C 10 big block 396 with an automatic. I sure could use your help. Just subscribed, My issue is stalling when I am at idle. Just advice, Thanks Dan
Dan Clancy whats your idle
Set at? Is it stock modified and what kind of vacuum
Are you seeing at idle
The Aviation sealer does not work with fuel, the gas will dissolve it, why don't they suggest Teflon tape on it?
Holley does not want that system set with progressive linkage! Not suppose to use rubber lines with hose clamps!
This guy is the real deal. I want to see him drunk and listen to him tell us the truth about America!!!
Hands down best comment Ive ever received
Great review! I was going to do a Megasquirt or Haltech on my 75 Datsun 280z that I’m Turbo’ing soon... but I started looking at the Super Sniper 650 to work with a single carbureted intake and a bonnet / carb hat, with a front mount intercooler. Is the tuning as “self tuning” as they say? Or will a tuner be required to get a solid tune?
Dan Lombardi honestly on a mild application the self tune is adequate but i wouldnt trust it on a forced induction application. Technically i dont have any experience with how well it learns with a turbo but id budget for a tune. Also make sure the stock fuel pump os sized to support your power goals. For example my Super Sniper 1250 can only support around 550hp on the stock fuel Pump. It has the injector but you need to upgrade the pump.
Love it bro. Just got yourself another subscriber. Bad ass truck(and sun glasses haha). How’s this set up been working for you?
It has been great! Just bought a new Mercury project car. Im hoping to get more in depth with the tuning videos but on the carbureted side. Thanks for the sub!
Good video. I agree completely with the H2O sensor and think the O2 sensor can be improved. I have another sensor on the other side with a gauge in the car. The two are not matched up. I read the O2 is from a VW or Audi. Can you tell me the exact part number? Thanks DOC
Very good video. Tks for the info. Great great !!!!!!!!!!
Thanks man!!
Just put a brand new gas tank in. Should I get a drop in fuel pump? I ran a supply and return line 3/8 and 5/16 and currently have Carter carburetor. Also should I buy holly throttle linkage? I have l35 396 .030 over thanks
Did you have overheating issues before the EFI? Did you get it dyno before you order the 1250? I have a 454ss and really want the efi but still doing research. Love your truck
Estevan Flores thanks for watching! I didnt get it dynod before but i wish i would have. No overheating issues. Im probably going to swap my 195 T stat for something closer to 175. Most times ive had an overheating issue its been either a radiator cap or air in the system.
Good video and very helpful. I have a question regarding Holley and it's 255 Lph OEM Style Fuel tank Module product #(12-304) that allows your to use your existing stock gas tank and run a returnless to the Sniper EFI. Wonder your thoughts on this holley product and if your have ever used or installed it before and if it's worth installing a returnless. Thanks again
No reason that it couldnt work well. Submerged fuel pumps typically last longer due to them being kept cool by the fuel. But as long as you can keep your pump from starving, ideally cool, and dont have a block downstream filter making it work harder than it should you should be ok.
That leak in gas hose, wonder if that has happened to anyone else and if only this model of Holley?
Gday mate form Australia. Thanks for the video and info. So I have a Sniper system to install. I have the Throttle progressive linkage to retrofit. I had heard about the temp sensor problems. So what replacement sensor did you use again and where could you source a similar one???? Also the linkage you talk about is this for using a cable system???? I am not using an in-tank fuel pump sadly but have the Holley fuel kit. Anyway good honest info. By the way, how much better was the engine after fitting???? Better starts, economy, driveability, acceleration?????
Thanks for watching! So a couple of things. The cable setup i have is for a throttle cable and not linkage. Since this video i have actually removed the progressive option. The reason being is that while the progressive linkage improves low speed drivability it hurts performance. What i have done is install a small lever arm where they throttle cable attaches. By mounting it higher it acts like a small fulcrum and makes the pedal effort more manageable while still opening all four butterflies. This would be my go to option after driving it for a while. Maybe i will make a video showing what i fabricated. Biggest improvements would be economy, consistent cold starts, and overall consistency to drivability. Performance before and after were similar in terms of all out performance which is as to be expected. With regards to the CTS i had to search on the forums and picked up a sensor from a local parts store. Sorry i dont remember the part number off hand
I want to hear it run and drive!
Great video, well done, lots of information. I have a 70 Corvette, 454 mark IV and am going to install a Holly Sniper. Looks like I can fix some trouble areas and eliminate some frustration before they get me. I especially like the progressive linkage set up. Is there a part # for the linkage I need? Thanks, Steve
Steven Shelhamer i believe if you search Holley Sniper linkage they offer several options. Otherwise get a stock linkage from a 750cfm double pumper and you can bend it to the progressive linkage setting of your liking by checking at what TPS percentage the secondaries open at. Please check out my newest video. I just uploaded it a few minutes ago it should be available soon.
@@truckandroll989 Thank you. I'm looking forward to it. Steve
Is the Super Sniper taller/lower/same height as the 750 you took off? I cannot go any taller with an EFI throttle body since I have a Weiand 174 blower or my air filter will be hitting the underside of my hood. I'm already using a 14"x1" round air filter w/ a 1" drop base and KN topper.
I apologize i no longer have the truck. It was very similar. From Holleys website they say the height is 3.28” tall for the Sniper. Youd have to call or measure for the carb height
I put the Quadrajet Sniper on my ‘76 K5 with a 400. I also did the in tank pump. Happy with it after a year but I think I’m missing something. I still have the HEI distributor. Should I get the hyperspark system? Another $475 on top of $2000 spent to get where I am. Worth it?
Craig Fulton thats a tough one. If you are computer savvy and like tuning id say yes. The biggest benefit for me is how much advance i can add in at low rpm/low load that i could never simulate with an HEI. If you aren’t terribly concerned with fuel mileage and think it runs great as is maybe save the $500. If you HEI goes or you are planning on replacing the distributor anyway than go Hyperspark.
Good video man 👍 just subscribed
72MrHotrod Thanks i appreciate the support!
Does the parts also go for fords aswell?
Hate to revive a yr old question, but im debating on the holley sniper on my 79 bronco. Curious about the parts going for ford's as well
How's this running now that you've had it 2 years? I ordered one a couple days ago and then got to looking at videos of them and there's a ton of people complaining about ECU and sensors dying and even the control box being DOA and having to send the unit back to holley and wait while your car is out of commission for 3 weeks. There were so many of those type of report, it made me go ahead and cancel my order.
Its hard to find good long term reviews on these things. Maybe because when things work right, nobody bothers to post about it?
How many miles are on yours after these 2 years and how much downtime would you say you had from it once you got it up and running?
Its been good for me. I had two issues of sensors going (coolant temp and throttle position) but i was able to get replacements from local autoparts. Honestly i cant complain it starts every day and runs well
Did you have to put a 1" spacer between the EFI and manifold?? Or did you have to go to a single plane manifold? TIA
You do not “have” to do either. If your particular setup wants a longer intake runner than a spacer can be beneficial. I spoke to Holley at LS Fest West because I was experiencing part throttle whistling with my 1” open spacer. I was informed a 4 hole spacer should fix that noise. Best of luck!
How accurate is the efi as far as learning mode on the AFR wideband ? You said you changed the sensor so when your cruising , stop and go and WOT that thing is keeping perfect AFR ? Just asking since that's the whole purpose of it .
Also if you can go into software and manual tune it would be a plus instead of just relying on the unit to learn all the time how is the AFR ?
It was alright honestly for driving around when it was stock and put down pretty decent power on the dyno. If you want to get it truly dialed i would vote to take it to a chassis dyno and let them dial it all the way in. This is especially true if you plan to race it. Its not keeping perfect afr like my ‘21 Mustangs stock ecm does but its pretty darn close
@@truckandroll989 thanks 👍 for the review
Thinking about get the same setup for my 355 small block. It’s got a Weiand 177 Supercharger on it though. Do you think it would work alright on it? I guess I shouycall Holley but just picking your brain. Cool vid, can’t wait to see some upgrades on the truck👍🏼
Mikey J thanks for watching! I won’t say I’m an expert by any means but from what I’ve read / seen I think it would work great. The instructions have a few particular steps to follow if you’re going supercharged/turbocharged. There’s a few modifications to make to the throttle body (different ports that need to be plugged). Good luck with it!
I'm considering going to this on my square body suburban. I currently have TBI on it and it's got a few issues hiccups when taking off cruising on the highway it has a hard time picking itself up when throttle applied and fuel mileage sucks about 9 mpg. Have you noticed any improvement on fuel economy with the sniper?
If you already have TBI my advice would be to skip the sniper. Spend a little extra and do multiport EFI. I have a 95 with TBI in my Sierra and it honestly runs good. I also had to troubleshoot quite a bit, replace filters, disassemble and clean the TB and injectors, etc. As far as mpg i was going EFI around the same time as adding performance parts. I can tell you it got close to 15mpg driving from LA to SLC. Thats a climb too (sea level to 4500’). If you are dead set on the sniper definitely budget for a dyno tune to really dial it in. However, like i said i think multiport efi would be the way to go for you. There are bo drawbacks other than price
@@truckandroll989 I've looked at the Edelbrock ram MPI also
Rector seal hmm sounds like something people need in prison
Way off. Rectum seal would be more appropriate.
Is that coolant temp sensor you mentioned only for GM applications? Great video
Stallion Ranch Woodworks nope it should work with a Holley Sniper setup on any application
After a couple of years of having this whats your opinion now and hows the drivability, start up and throttle response? Thanks
Start up is great. It reacts to weather changes much better than a carburetor. Throttle response is good but some tuning is required. Specifically, whether you want a progressive style throttle or racier 1:1 linkage. The latter is preferable for performance but can include a stiff pedal. Some of my videos cover how to fix that. All in all if this is just a weekend or occasional use car Id spend my time tuning s carb and save the money. If this is your DD and you need it to get you to work every day i would consider it. If i could do it all over again I would have skipped TBI and gone straight to a multi port EFI conversion
Thank You and 1st timer and sub!
Stephen Mitchell thanks for watching and i appreciate you subscribing! Hopefully this weekend the old heads and cam will Be replaced with a top
End kit. Im excited to see how the system copes with the changes
Great video....thanks for explaining the issues you had.
So, I've been researching this for a while and I want to install a Sniper unit on my 427 BBC. Which unit do I need to get...Super sniper 1250 or Sniper 650? Currently, I have 450hp but I do want to do a top end kit and probably a 200 shot of nitrous which should put my hp levels over the Sniper 650 unit. What hp level did your motor originally have? Did you have any issues running the 1250 at the lower hp level?
Good question. I would say to be safe go 1250. If we talk flywheel horsepower, which is how the units are rated, im between 500-550hp. Stock was about 390hp. I went with the Super Sniper since it had added features for power adders. That may have changed with newer software updates but you’ll want to be sure the one you get has a timing retard feature to coincide with your nitrous. I had no issues running mine at a lower power level. My biggest ongoing woe is the throttle can be touchy. Ive gone back to a non progressive linkage with a custom adapter i fabbed up. From a performance standpoint the linear throttle is better in my opinion but the initial pedal tip in is stiff on your foot.
Thanks so much for answering my questions. I emailed Holley 2 weeks ago and they have yet to respond.
My 427 is producing around 450hp at the flywheel. So, if you had no problem at the lower hp level...then I think I'll go the Super Sniper or Terminator X route.
Once again...Thx
I've enjoyed your videos.
Just subscribed. Great video. I have a 72 BUICK GSX replica that dynoed at flywheel at 550hp with a spacer and a Speed Demon that I hate with a passion. I may be increasing the horsepower to maybe 650, but debating on doing what you did with 1250. Your thoughts? Is it a wast of money? Do you have Dustin’s direct number? Sounds like he was really helpful. Just put in a notched tank with internal pump and really thinking about pulling the trigger on HOLLEY SUPER SNIPER LIKE IN NEXT DAY OR TWO. Thanks for any help.
Your GSX sounds awesome. I would definitely recommend it. It took me a little bit to get the kinks worked out but now that it’s running it’s more responsive, smoother (and surprisingly quieter), no starting issues. I’d highly recommend getting the Hyperspark too so you can control timing. I’ll make another video on how to improve the stock timing tables that made a noticeable difference in drivability. I don’t have Dustin’s number but you could call and ask for him. Good luck!!
Thanks, going to look into Hyperspark now and make the decision asap. Please post videos when you get a chance.
@@truckandroll989 Great video thanks! Would like to see your video on the timing tables, that's where I'm at now too.
I'm assuming that's the 12-308 fuel pump? It says internally regulated to 58 psi, did you still have to use an external regulator?
Chicken Pimp nope. The ecu does all the regulating. All you do is install the inline filter, supply, and return lines
Did you see any noticeable improvements in mpg and cold starting
Rory Mckee i haven’t had a chance to put hard miles on it to compare mpgs. With my previous Holley 670 carb I was getting around 14mpg highway cruising around 75mph. This was measured between California and Salt Lake City which is pretty much uphill the whole way (sea level to 4300ft). My AFRs with the carb were dialed but I certainly wasn’t giving it enough cruise timing. I think that’s a big benefit of the Holley with Hyperspark. My seat of the pants dyno tells me that with efi the throttle response is crisper. Additionally I’d argue cold starts are better. However with a properly tuned choke your cold starts shouldn’t be an issue. A definite improvement is drivability when cold. You had to feather gas with the carb until the engine warmed up. That’s completely gone now with the Holley. Hope that helps.
I just finished installing mine, went to flip the key and didn't even have the touchscreen turn on, I went over EVERYTHING TOP TO BOTTOM and still nothing. It's like it's braindead this experience has been dog shit to say the least...im gonna call holley later today to see what they say but ill most likely have to return the whole unit and get another one with a different tablet
So what did you ended up doing ?
Did you have to do a fuel return line? How was that?
EvanTV yes you do have yo run one. Its not hard. I used holleys new tank so my fuel pump is all encapsulated and it comes with a connection for the return line so you arent cutting into an existing fuel tank. Ive got another video of me doing the fuel system on my channel. There was one hiccup...
@@truckandroll989 Thanks, Man. was the new tank worth it, you think? I have a 1971 c10 I'm looking to EFI
EvanTV I think so. It gave me peace of mind. Going to an in tank pump is preferred over an exterior inline pump since the fuel helps to keep it cool. A few tips if i could do it over again. Check for leaks before installing the pump as its a pain to remove and reinstall by yourself. Also plan ahead for future modifications and keep an eye on the flow ratings and line sizes. If I knew then what I know now I would have upsized everything. The Holley Sniper will support 650hp NA but the pump and lines wont without upgrading.
@@truckandroll989 Good call on upsizing everything. Thanks, Man. I am pretty excited about this upgrade. She's a good truck.
I was thinking I'd stick to the outside inline pump, though. I worry about difficulty in replacing it when it goes out. IDK
Did you follow the directions to a (T)? I have mine coming in the mail tomorrow. Would you recommend this on a stock application?
Green Machine its been a while since i installed it but i typically read through the instructions multiple
Times before starting. I recall them having good instructions and i did follow them pretty strictly. Yea it should work well on a stock application
returned the whole system and got edelbrock instead. nothing but headaches with the sniper
quatre5555 darn what type of issues? So far from a hardware standpoint i had a TPS go on the fritz but i was able to get tit working and i lost a coolant temp sensor a few weeks back.
@@truckandroll989 randomly shuts off for no reason, iac randomly shoots to 100%, 2 hyperspark distributors stopped working in under 5 minutes, third one didnt even start out of the box.
what timing were you running before installing the upgrades. initial and total depreciate the help.
juan juarez im trying to remember back. Probably before installing everything like carbureted 14 initial 34 total. With hyperspark it was like 20ish initial and 34 total. Final now after dyno tuning is closer to 24 initial and 36 all in
@@truckandroll989 thank you i have a 77 k5 blazer the engine was send to rebuild and install a edelbrock intake, MSD distributor and a 770 holley carburetor and is hard to find someone to tune around these area i want to make sure im running my engine safe but powerful. i also have a blue torque converter i belive is the normal with a 400 TH and the Gearvendors overdrive and i have the time set to 12 initial and abut 35 total. like i said i dont have experience everything i been doing is watching videos here but it seems hard to find 454 on these trucks. i saw yours and it looks the same.
engine came off a 88 costume chevy flat bed i dont even know what kind of cam i have on it.
Hey man , how's the cold start difference between the sniper and the carburetor ?
The sniper is more consistent for sure. I never had any issues with it being hard to start in the winter time or stalling if I immediately take it out and drive it. I won’t say it is 100% as smooth as current multi port injection but its better than a carb in this regard
Lol, has Holley everything, reps the edelbrock air filter cover
bought a msd atomic 2 and wondering do i run a pvc with it ..........thanks
Its never a bad idea. You could always hook it beneath the TB to a vacuum port on the intake manifold
I am in the process of building a race car...what are your thoughts on wide open throttle?
Todd Sizemore prior to dyno tuning id say it was inherently lean. That got straightened out after final tuning. Id say if you are running a 750cfm it would
Be an improvement if your engine wants the additional airflow. As I recall the super sniper is between 800-850cfm. At wot fuel injection and carb are similar in terms of power output. Carb benefits from the ability of cooling the incoming air charge. I guess i suspect it depends on your current carb’s ability to flow the required amount of air.
I was reading a review and it said that the carburetor was quite loud. Do you have any noise problems?
David Robrahn none what so ever. Ive heard of people having an issue without a carb spacer but mine doesnt and there is no noise. You do need to set the throttle to adjust the IAC valve between 2-10% at idle. Perhaps folks aren’t doing that and its causing a sucking sound?
@@truckandroll989 thank you
You can hear the tick of the injectors
We're the lines all long enough! I find most of these kits always come up a couple inches shorter than what I need
So electrically yes everything was fine. The
Fuel lines could have stood to be maybe a foot longer or so but i was able To make it all work and haven’t had any chafing issues in the year or so ive ran it.
@Leather Gaming cases you need a box of matches
What’s the part number for the temp sensor
I havent had this setup for a few years but a quickle google search shows:
www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_service_components/parts/543-120
Best to call Holley if you have questions on replacement part numbers.
Do you recommend getting the cd box with the kit
There are a few different options for ignition. I recommend the hyperspark. The ignition curves are 100% tuneable. The ability to add a ton of initial advance but limit total is very nice to improve vacuum with large cams
Do you know about 20-16 throttle lever extension?
Jason Beaulieu no i dont but honestly its something i want to look into. My TPS doesnt go to 100% open when I floor the truck (only about 93%) plus the stock style cable is finicky
TruckandRoll I’m literally installing a progressive linkage the adjustable one as I type this and I can tell you that on my sniper even when operating the throttle by hand to pull the throttle cable adjustment out of the equation the highest TPS I see is 95%
Jason Beaulieu i want to say my situation may be similar which is annoying. Im sure the effect is negligible but its frustrating
TruckandRoll Holley tech told me today that if it goes above 85% it’s all good. On another note I noticed my secondary blades seem to stick in the bores. Oh and my cts was reading 20 degrees higher than ambient/and mat. I replaced it today, it’s 1 degree different.
About how long did it take you? Thanks
PoliticsReligionTruth.Com it took me a few weeks for sure working a little at a time. The hardest part was the fuel
System because i did a whole new tank
TruckandRoll Thank you! I appreciate it.
Cool video
How much it all cost?
Nice Edelbrock airfilter on there. Lol
Kenneth Law lol it goes better now that i installed the Edelbrock aluminum head / top end kit ;)
For one you way too low on horsepower for the super sniper if you don’t have at least 550 your gonna have that problem with the amount of motor that system is designed for you wouldn’t need the progressive linkage as much
No Joke Racing its actually seeming like the opposite. Check out some of the newer videos. At WOT the MAP sensor is still reading a small amount vacuum indicating its restrictive. Ive since swapped to the standard linkage but lengthened it to its easier to control. That seems like the preferred setup over the progressive linkage.
Do u have to phase the distributor ?
Greg Labuszewski im not sure is phase is the right term or if thats for another style of ignition but yes you need to set the distributor to a set timing and then going in the software and ensure the actual timing and digital timing on the handheld match.
Are you still happy with the progressive likage.
gs1260cc i am. You can still notice theres a bit of a hard spot in the pedal where the the progressive linkage starts opening the “secondary butterflys”. Its not as smooth as a modern car but i still think its better than what it came with out of the box.
@@truckandroll989 Thanks for the reply. I have a BBC with a stick shift. I tried the progressive linkage for a bit, but ended up going back as I was working out an issue with the intake leaking. I'm debating about trying it again now that I have the intake issue sorted out.
gs1260cc interesting. Yea there are still some fine tuning issues that i want to get worked out. Whats the setup with your big block?
@@truckandroll989 396 BBC in a 62 Chevy Biscayne. Trans is a T10. Motor is pretty mild. What I enjoy with the Sniper is the instant starting, throttle response, and How much leaner I can run it at idle. With the carb I had to run it stupid rich to get it to run right. The only downside I've found to the sniper is if you have anything off with your motor the sniper will not quite run right. Where the carb seems to mask the issues. Intake leak caused surging. Low timing at idle wouldn't let it idle under 900 rpm. A bit of tweaking seems to have things sorted out
What sensors did you purchase?
Sorry its been a while since i watched this video are you referring to coolant temp or TPS?
@@truckandroll989 In your video you described some really odd readings relating to temperature and not being able to get the system in to self learning. I understood this to be related to the coolant temp. I'm doing an install of my own right now and thought to be proactive. Thanks! Nice review of the system by the way.
@@stevelangworthy9553 ahh yes. Actually fun fact. About 1yr later the coolant sensor totally
Failed on me which made the truck almost undriveable until i got a replacement. I plan to pull together a comprehensive 2yr long term review shortly. Ultimately it is a good system but some tweaks are required.
No way would i want to deal with these "small" issues. You've already worked through them but in the moment your screwed over and over until its figured out
Yea i feel like no system is perfect. Even a perfectly function system like this is still “throttle body injection”. It would certainly
Be more wires and more costly but a true multi port sequential fuel injection system would
Be ideal.
Why did you go with the 1250 with a stock motor?
Roman Macias check out some
Of my newer videos I just added an edelbrock roller cam conversion top end kit. I was planning ahead for more power to come.
Is it still running and do you still recommend it?
Ive since sold the truck but yes it is still running. Here is my general recommendation to anyone who asks. If carb tuning is an enigma and you arent worried about all out performance go with the Sniper. If you want to save some coin and are pretty good fussing with carburetors spend $300 on a wideband gauge, vacuum gauge, and tuning kit - you can get close to the same results. If you want maximum tunability and power invest in a true multi port EFI conversion system
@@truckandroll989 heres the thing. I havent messed with a carburetor since early 2000s when i had my 442. But now im getting ready to purchase a 67 camaro with a 396 4 speed and edelbrock av2 carburetor. I may just learn how to mess around with the carburetor first and maybe ill just be happy with the av2 carb
@@armygreenfj3924 you are in luck sir. I love edelbrocks! I have a a few videos on tuning them. For a street car you cant ask for a better carb. Check out some more of my videos. I show some of the key things you need to do first to dial in an AVS2
@@truckandroll989 i saw the video already lol. Ill watch it a few more times and get the hang of tuning a carb
So glad i found your videos. You seem like you know what you’re talking about.
What about mpg?
coco Boo so without a tune i would say vest was 15-16mpg which isnt great but not terrible
Way better than a carb not bad at all
nices
Honest Dude Review: Red Glasses.....yeah, got too high before filming.....happens..
The first two problems can be resolved within the software. But unless you know the software very well you will get nowhere. The self-learning thing is a scam. You need to take this to a tuner that has a Dyno and it might take all day and he will create a map and it will probably cost $1,000 at least. This whole Holley sniper crap claim is pretty much as deep in doo doo as CNN
Cattywampus (sp). Lol.
Ya, buy directly from Holley and WAIT 4 MONTHS !!!🤬🤬🤬🤬
Dang. Yea nowadays things are always pretty late. I bought this back in 2019 way before COVID so all was easy