BEST CARBURETOR FOR STREET OR TRACK?
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- Опубликовано: 1 сен 2022
- I WILL DETAIL WHICH TYPE, ANNULAR VENTURI OR STRAIGHT OR DOG LEG BOOSTER VENTURI? REGARDLESS IF IT IS A DOUBLE PUMPER OR VACUUM SECONDARIES VENTURI DESIGN IS VERY IMPORTANT TO ITS PERFORMANCE POTENTIAL!
I WILL BREAK DOWN THE DIFFERENCE AND EXPLAIN HOW IT IS BETTER AND A LITTLE TALK ABOUT THE NON- EXISTENCE OF CARBURETOR/THROTTLE BODY SUCKING AIR TO PRODUCE HORSEPOWER.
COVER PHOTO SUPER FORD MAGAZINE AND INTRO VIDEO OF ME @ TERMINAL ISLAND PULLING THE PARACHUTE ON THE FINISH LINE SAME WITH THE CAR I AM RACING DOING THE SAME!
Obtw, I get numerous requests for technical advice and if interested, tex me @ 626 203 2712. Half hour to 1 hour+ rates are available. Most calls go over as posted and it is ok. US Pacific time zone.
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Thank You Mr Alameda for sharing your knowledge !
Professor Ben,that may have been the best and simplest explanation of atmospheric pressure known to man. Thank you. From off the grid in Az
The more compression, the bigger the bat!
Thank you for the video.
Damnit Mann..! Wish I would of had an uncle like you.
Mr. Alameda.. I appreciate all the effort you put into these videos.. as iron sharpens iron.. so one man.. sharpens another..
Thanks for your support!
Unbelievable expertise You have Ben… I am a subscriber to your channel, and enjoy so much content you provide.
I would very much like to see how you rate certain carburettors with certain combinations with cams, head work, etc… then how you can optimise the best results with proffered transmission stall torque converter, and diff ratios.. this will be very interesting as I have always struggled to get it right over the years.
Hope I could have been your apprentice at your shop over the years… 😊😊
Take care and thank you.
Thanks for the kind words of appreciation. I am grateful sir.
your a great teacher ben i cant get enough
thank you Ben, good information as usual!
Thank you Ben for the lesson.
Love learning from you.
Keep it coming.
crap...
Thankyou for sharing that mr alameda very informative.I hope all the success in building your channel rome wasn't build in day.peace
fascinating and excellent descriptions, thank you very much
You're very welcome!
Years ago I switched from a Vac Secondary 750 to an annular booster 850 dp on my 440. Wow !! What a difference!! The car finally accelerated like I had always envisioned. That 850 annular carb, combined with a new 3,500 converter netted me 6 tenths reduction in e.t. my next time at the track. Been a firm believer in annular boosters ever since. Your experience confirms it.. thanks again for sharing your valuable info Ben.👍
Thanks for supporting my channel and your comments which really gives credence to what we have experience with annular discharge venturis on this holley carbs.
@@benalamedaracing2765 You're welcome. 🍻
Yup
Thank you for sharing your knowledge and experience. You simplified it enough to where I can even understand it.
Thank you and I feel it is the best approach to give examples to explain it fully.
Always interesting stuff!
Thanks for your support Adam!
Thank you Ben! This video really breaks down the difference between boosters and how you explained it makes all the more sense!
Thanks and I could not have made the power i did if I ran an inferior carb booster and this thing allowed me to brake torque my engine without a trans brake of clutch and leave the line fast to a low 10 second run in 1990. I couldn't get anyone to give me a jump with an all steel car and interior with diminutive 9.00 x 27.00 M&H slicks! lol I ended up giving some of the nitrous cars the space with this innocent looking mustang. lol
Thanks for knowledge!
God bless you...... Your wisdom is phenomenal you're extremely educational you have my utmost respect
Thank you Michael appreciate your comments sir.
Ben that properly explains why manufacturers went to multiple port injection.
The better atomization of fuel, produced more low end torque.
Totally agree👌🏼💯 Been saying this stuff on my posts also…..just tuned into the channel 👍🏼🏁
Thanks for your support of my channel! I will be doing a quick carb tip perhaps tomorrow.
@@benalamedaracing2765 anytime👍🏼🏁, great informative content Ben👌🏼🏁.
All your info is spot on! True to the racing world! I’ve explained your theories to many people over the years and they look at me so confused!
Timing ,carb sizes and throttle body sizes along with injector size! Why slapping a big carb on a stock motor is a bad idea etc etc..
Thanks for sharing and appreciate your support!
Excellent Teacher 👍💥🔨🤠
Thank you kindly
Great video, I would love to hear more about your knowledge of carburetor jetting and tuning.
Anytime you go above 4 jet sizes on the same jetting for sea level tracks as it came from Holley? Start looking for a problem with the fuel pressure or delivery volume of the fuel pump! I will be doing a short video about things people missed on Holleys coming up!
Back in the day I played around with stainless steal screen mesh in between two 1/2” carb spacers! I was amazed how the drivability improved. Assuming because of atomization improvement! Night and day difference! Only problem is the mess kept breaking down! Assuming from the heat of the engine! I’ve seen intake gaskets with a similar mesh material built into them years ago but imo just under the carb would best!
What you found out was the mesh broke up the fuel droplets into tinier spray mists and there is your added power!
Another appreciated learning lesson sir.......
Glad to hear that you are tuning in and supporting my channel!
@@benalamedaracing2765 Appreciate all your collective info, I'm now on my first solid roller engine and carburator after having stand alone fuel injection for 20 years.
I'm running a QFT 950 Black Diamond on my current street setup.
Good stuff Ben, I wish I paid more attention in my physics class😎
Thanks as well!
PROFESSOR!!!!!
Please keep sharing my videos Peyton! Thanks
The type of booster can completely change the performance of the engine!
Yes and a finely atomized state of the fuel will work real good when you light it up!
Ben I want you and I to build a sleeper engine.
For the Panther Cars:)
14:1 Flat Top Piston 4.6 2V
Trick flow heads, custom grind cams
Water injection - so she won’t detonate
Well done. I do believe the annular discharge booster would help a lot of street applications solve their issues with surging while running at cruising speeds. Mystified fuel vs a river of separated fuel running on the floor of the manifold then re-atomizing at the valve seat.
Agree sir and you got it right and a tight quench clearance helps the whole process big time! I will do a video on just these scenarios soon and should be a good one.
:Always great info and explains it very: well . You're like a horsepower, racing, dictionary . On my 347 422rwhp 11.3:1 compression 210 cc ported heads and intake thats single plane i asked about a better roller cam spec that u would recommend that duration @50 is 242 In and 248 ex lift is .576 In .600 ex 110lsa
I pm you at your channel.
Ben im just now seeing your channel and loving it. Do you by chance have a video on plug reading? Their are some videos out there but always leave something to be desired, like really up close and in depth and actual plugs showing too little/too much timing?
Great suggestion! It is actually a black art and when you ask different racers the opinions differ very much. I will try to do my best while keeping secrets that will not affect my customers closely guarded things they look at that I have shown many of them. I will definitely do it while keeping some privacy in check... Thanks for the suggestion.
@@benalamedaracing2765 Cant wait
@benalamedaracing2765 Ben i was just thinking. I would be willing to pay for that info for myself. Kick it around and think about it. Thank you sir
Wow thank you for the awesome video. I have a holley 850 dp on a zz502. Down leg boosters. After watching this awsome video I'm going to change the boosters to annualer . What size jets should I run after I change to annualer boosters?
You need to cross reference your carb venturi ID and throttle plate diameter and look at a comparable CFM 850 on copy their jet numbers and that should put you close to the ball park. Or ask for Holley Tech and they can give you a more definite answer.
Awesome video bro. I do professional carburetors. You try out one of our custom built 4150 or 4500
For sure I will be trying your stuff!
Hello, your channel just came across my feed 2 days ago and I am so thankful for all the information you are sharing. I do have a question about Dynamic compression, alot of people say no more than 8.5:1 for a street engine but does cylinder pressure overide that statement? Which is more important the Dynamic compression number or the actual cylinder pressure. Could you please explain Im a little confused. Thank you for all your information.
Just make sure when cranking about 4-5 kicks on the compression gauge you do not exceed 200psi. Lower numbers from here it will run with no problems with 91-93 octane pump gas.
Back in the early 2000s Barry Grant made a inline 4brl carbutetor called the bad man. I believe they had annular boosters. I would love to get my hands on one of those carburetors.
FORD beat him to it with the inline Autolite carb in 69-70. Could get one inline or dual inline. Had a chance to pick one up in mid seventies. Damn. Wish I had
That's right, it was developed by Ack Miller fords performance adviser at the time.@@lonniemonroe2714
Had a friend that ran NHRA Comp. Eliminator with those inlines and broke the class record years ago! Rare as anything of these types and produced awesome power for sure! It was a Boss 302 .
Hay Ben don't forget to recycle those bottles. 😂
Absolutely after I charge my car's battery to make it to the recycling joint! lol
Hi great video! Question. Is it implied the straight and dogleg naturally consume more air in your water bottle demo? And would this have any effect on making the mixture more rich?
Dogleg boosters flow about 20cfm more with the same venturi and throttle shaft size! The difference is within the air bleeds used and meanwhile the annular venturis actually run a richer on the rpm drop after a gear change which helps high compression engine.
The gravity affect on the water makes a low pressure area in the top of the bottle and atmospheric pressure forces air in to fill the low pressure area. Gravity is the force pulling the water out, The low pressure area created by gravity allows air to equalize the pressure forcing it's way past the water which is flexible and not very compressible.
Since water is malleable it conforms to pressures outside and within these is why it did what it did. If it resist changing and keep its shape it will not drop to the bottom. What we see is atmospheric pressures distort and push itself on the sides/middle or whatever to get inside the top of the bottle and pushes it downward! Keep this in a firm condition and it will not do that. Gravity also has its effect because water has weight with its volume... If we would gel or freeze the water then we have a different scenario even if it is not stuck to the bottle's sides.
Herein, leakage off the sides will allow atmospheric pressures to go to the closed top of the bottle and pushes the solidified water downward. Science is fun isn't it? lol
Sounds like my Physics professor.@@benalamedaracing2765
Ben, I hear it is possible to put the 750dp main body on the 850dp base with a few modifications. Would you be familiar how to do that? I have a new 750 main body with annular boosters and an old Quick Fuel 850dp. I was thinking they might be a good match.
Yes I have done this very thing and just note the gasket matches the holes on the main body & throttle plate. Use the 850 throttle body gasket and it should be a breeze making them work.!
I like big compression, and I can not lie....., do you want to go fast, or be last ? I have been to the drag strip so many times and you can hear the beginner's every time. Some you can help, others have it all figured out.
Agree with you 100%!
I’ll end up with two long blocks:)
One High Compression Sleeper
And a blower / turbo long block
(To be continued:)
So always get a annular carb if posiible i thought downleg was the best
Annular boosters are more effective in mixing the mixtures more effectively and gives a better signal.
So...
In a wedge head motor the quench pushes the flame front back at the plug?
It actually does push them at the vicinity of the plug location however, the other important aspect is its ability to blow the fuel wetting areas accumulating beside the spark plug location!
Another great video! I’m thinking my 9.7:1 454 with 221/235 @0.050” HR cam, air-gap intake with 3310 VS Holley may have some left on the table. DaVinci added downleg boosters to the secondaries and said it flows 830 cfm. I am wondering if I need an 850-950 DP with annular boosters? It is a street driven ‘72 C10 with occasional trips to the drag strip.....and beats up on the occasional loud hemis & stangs.....😂
you probably only need a 750 with annular discharge . that cam is small for a 454 and probably wont make power past 5000-5500 RPM
@@KingJT80 it makes gobs of power to 6k where it hits the rev limiter.....
@@trailerparkcryptoking5213 yeah that actually sounds about right. the 750 AN quick fuel carb would be a good one for you. has an electric choke too
I hope you see this... Over the years it has been evident that carbed vehicles with overdrive transmissions tend to bog and get crappy mileage if they are running at or less than 2000 rpm at highway speeds. This is, of course, where FI shines. However, with the low-speed superiority of the annular booster, would it not follow that it could handle low cruising rpm's better than the other boosters? Some factory Ford Holleys in the 80's came with annulars. Were they hedging their bet against the "new" overdrives? Thanks for your input. Yes, my YT name is what you think it is.
Yes sir you got that figured out that Annulars do exhibit superior performance compared to straight or dog leg boosters. I believe with such tall gears out back and overdrive autos/sticks that will be an issue and possibly exhibit some low rpm surging. My 85 5 speed HO had 3.08 and the front venturi's if I remember correctly did indeed came with an annular venturis at the front of the carbs. It worked great and I did some changes evaluating this thing @ the now defunct Riverside International Raceway and had to convert the rear metering plate to a standard type removing the stock flush type plate system at the rears!
@@benalamedaracing2765 My friend had a car just like yours and he reported worse mileage on the freeway in 5th than in fourth. No surging, but no power, either. He switched to 3.73 from the 3.08 and the rise in power and mileage was major. Does it make sense to put annulars in the rear for freeway use?
@@413x398 good question! Was wondering the same thing after hearing annulars are better at lower rpm....
ok then im going to smack it im trying a sbc 396 at 14.5 :1 ive never handled pistons so short or a dome or stroker . At least third time ive watched this one
It figures @ 396 you will have a stroke of 3.75 depending on your overbore diameter. If you had a 400 block @ 4.125 bore x 4.00 stroke you would have a 427 small block! Here with a 64cc chambers and a flat top you would have somewhere around 12.4 or thereabouts! That is with a flat top. A small dome which is not really bad will take you to 14.5 without much effect on your combustion efficiency.
@@benalamedaracing2765 its actually a 3.875 crank .040 bore its i think 397.3 i just like to call it a 396 should i go 14.5 boy that sounds like a bunch how much octane does that require approx.
i spouse ill go there just to see im assuming this short piston will tighten up as it heats and not rock so much man a 28 -32 quench is so small 40 dont look like enuf
Any experience with the Predator or Kendig carbs?
I did years ago with a Kendig and was not entirely happy with the fuel control or its capability to mystify the fuel molecules to something more combustible. Venturis are hard to beat and I feel this is why it did not really get going with the racing community.
why is my old 850 dp from the early 80s crisper and stronger than a new one i just bought?
Perhaps if you are running big cubic inches that 850 is just right for it.
433 fe
@@benalamedaracing2765
Need to put your comments on your video inside a black box so we can read the text Ben
Thanks Michael for your input. If I can change the color of the lettering that would be nice but it is very hard to do it if it even allows me. But I will figure it out eventually.
Do you Take your carbs to CJ
Hector, I have run theirs and been very very happy! Regards to the guys out there at the shop.
no quadrajet?
Quads are good carbs and very responsive! However they are not track friendly unlike a holley's modular design, which can easily be disassembled and adjusted without much complications.
@@benalamedaracing2765 i wish someone would make an updated version of a quadrajet with annular front barrels. I know edelbrock tried but they have some flaws and aren't big enough for a really strong street engine. Not to mention they don't make the quadrajet sound I love🤣🤣
The engine sucks fuel and air.
It is the agreed description of many but from an engineering point of view, there is no suction or vacuum at play. Correct terminology is "absence of pressures" and "differential pressures" which makes the engine function as designed.
This comment differential pressures!
Thanks for your knowledge.
Thanks Rick!