Stock Cam vs High Lift Cam - Why You NEED Different Pushrods !!!!
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- Опубликовано: 8 сен 2024
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iv seen it far too many times! a big cam in an engine with stock pushrods. stop this madness!!! change the cam, change the pushrods!!!
DETERMINE PUSHROD LENGTH
• Determining Pushrod Le...
SETTING PROPER VALVE LASH/LIFTER PRE-LOAD
• How To Adjust Valves /...
This helped. Ordered a 278/204 intake,288/214 exhaust cam. Cam card said it would work with factory pushrods. After setting the lash the cylinders had no compression. Backed off the rocker and boom,. Good compression. Reset the engine to tdc and rechecked the#1 pushrods. Sloppy sloppy. Love and learn not to trust manufacturer s' word....
Just wanna say thanks for sharing the knowledge. I feel like every video i walk away with information that makes me say hmm i didn't know that!
That's what I hope to do, most things I make videos on I had to learn through a lot of time and experience with it. I just don't think everyone really needs to go through that. That means a lot coming from a guy named "negative Jeff"
No prob, Just a nickname from childhood. My life is the Murphy's Law definition.
+negativejeff I feel ya, man of constant sorry feels like my theme song some days.
I built a 350 (388) and put a smaller cam for the street .550 lift, it used to be a roller motor. My pushrod legnth ended up being .250 shorter than stock. Also with the cam, heads were milled .020 as far as I know because I got them used, and .010 block decked. Standard felpro head gasket. I found a good used set of circle track pushrods on ebay for $29.95, CV brand, chromoly /hardended. Their walls are .110 instead of the standard thinner .080.
I'm guilty... :( E-cam, GT-40P heads with stock pushrods and roller rockers...oops. sounded like a sewing machine! lol.
Keep up the great vids man, I always learn something!
Hey thanks! All hope is not lost, pattern up the rockers onto the valve stem to see where they are making contact, if it is in the center or close with less than a .050 spread you'll be fine!
Unfortunately, that car is long gone ('89 GT) But, I now have a '95 5.0 car, I learned my lesson on my '89, and will do it correctly now, I may go with a similar budget GT-40P H/C/I combo... live & learn.
+Mr. Jay A for sure, just try and help people out so they don't have to learn the long and drawn out way like I did in the day.
ThunderHead289 we have the same setup with the E303 & stock pushrods on my friends 95 and it runs fine. Must be the hydraulic lifters. Maybe it’s the E303, I’ve been told it’s the biggest cam you can use with stock pushrods
Willy Rohr what about a cam that’s 500/510
Im putting a tfs 1 cam in my rebuild with a new TF spring kit on the gt40p heads. From all the research I have done the stock push rods should fit. Most were saying everything under. 550 was usually good to go. Thoughts? This was a junkyard motor that im rebuilding and I have definitely exceeded my budget haha. I will def try and check the length or look for any movement. I know the machine shop is going to put shims in if needed also.
Hey there, I have a 72 F-100 with a 390 GT, it has the none adjustable roller rockers. Do each push rod have to go back to the same lifter? Or could in do new push rods with old lifters? There is a little wear on some of the push rods and some look to have very little wear.
211/220 at.050” lift 😅duration in 5.7l pickup on a 112 LSA. Heads flow 275cfm at .500 and 280cfm at .550 on the intake. 213cfm at .500 and 218cfm at .550 on the exhaust. The cam I chose has lift of .511/.517. My gearing is 3.73. Any chance thoughts on performance?
I do enjoy your videos very much. ive learned a lot. I do how ever have one request, if the audio can be amplified? or maybe a chest mic? my sound is maxed out and I cant really hear you very well.. only complaint :) great videos I look forward to the next
Thanks for the comment and the pointer! I have always struggled it seems with my recording equipment. I mean, I could do it with something better than a phone I guess. I used to do them with a blackberry, wow how things have improved.
I know this is off subject but can you use a solid roller cam with hydraulic roller lifters
Yes. You can also keep stock heads and, custom install roller lifters too.
Im sure youve probably had this before, but would you be able to get away with using the existing lifters with a new camshaft? The ones in my 302 now all seem to be in good condition with no nicks that i can feel with a scale on the rollers. for someone on a budget is it best to save up for new parts or will I be okay? Love the videos man! I learn tons
That's great to hear!!!!
You will. It damage a roller can by using the old lifters. It really all depends how many miles you want to get out of it. If they are doing well, they will run good now, but someday the internals and springs will wear in the lifters and they will have bleed down issues and what not. It's no telling how long they will last new or old. If properly cared for, if imagine thy would do 200k total. Flat tappet cams are the units that require new lifters as they "wear in" to their lobe so to speak
danetbra63 No.
The n271 cam that was in the galaxie you think pedestal mount rockers will be ok with that
+Matthew Simpson yes, but I would be sure to have rollers due to the lift - with that, pick up some shims from summit for pedestal mounts and an adjustable pushrod to pattern everything up to get the proper shim height. Then once you have a good pattern, you can go ahead and order pushrods 👍
ThunderHead289 you know the weekend is gonna be good when the car parts you orderd from summit show up on Friday
Have some pretty nasty lifters coming out this 302 in the 67, have around 1/16 worth of wear and more in a few of them, I say top end needs completely rebuilt
But anyways lol... what are the specs "Lift" of these two camshafts buddy?
Hi , I have edelbrock performer rpm "right out the box" heads and there are few problems. One of those is that some of valves are sinked deep in seats and valve stem high differs a lot and rocker arms geometry all over the place. There are not much options for pushrod at length what I need What You can advice in that situation? May be I can make a special fixture to grind accurately ball pushrod end for every valve to achieve proper geometry? I cant grind valve stems for that much because rocker arms will be to close to retainers. Sorry for my poor English.
For one call in and complain. Two, if you measure them out and they are within the same range for required pushrod length, then you will be alright, not perfect, but it would be what you have to work with. They come incrementally, so you will likely fall on one pushrod length.
do you work on Chevy's too? I got a stock 350 (early 70's) with 76cc heads and I plan to use 305 58cc 601 cast heads and I was wondering if I need to keep the 350 valve springs with that cam or if the 305 springs will do.
All small block engines work on the same principle. The valve springs should be fine as log as your running a stock cam
+ThunderHead289 OK thanks. I wasn't the last one to build the engine but I was told it was stock.
305 heads have more compression but make less power because they flow like crap.Thats the only thing holding a 305 back from making power. Never use them. You can use a 305 shortblock, its all 350 except for bore size, its a trick because you can get them cheap. But when you put good heads on, you put the heads on a bare block and scribe the heads from inside the cylinders, no crank in. You have to unshroud the heads/port them to the block.
Look like roller cams.
Anyone please answer.....
I replaced my street bike (sohc)with 10mm lift cam instead of 5mm lift. But the results are poor than the stock. Upgrade big carbs too and increased the compression ratio also.
please support...
It's not just about the lift,you also have to check exact valve timing and duration. Imo,10mm lift from 5mm is a bit overkill. It might be too much for your valve diameter to have any positive gain beyond 7.8mm of lift.
JuliusCzar belcaP thanks for your reply sir, I mistakenly entered as 5mm lift . It’s 5.2lift in lobe and a rocker arm ratio 1:1.5 so valve lift is 7.8 as you said.. can I increase it now to 10mm in valve area.
Bore x stroke - 70x58
Inlet valve- 22.5
Exhaust- 19.5
Carb- 34mm flat slide
Pls do support...
@@ravikannan9425 what bike are you working on sir? Imo,the short answer is yes,but I can not guarantee that it will be the best valve size for your 223cc build. There are a lot of factors to consider like,cylinder head design and also the bikes intended purpose(drag,circuit or just road bike). Since you are planning on adding 10mm on the valve size, I assume it's 2 valved cylinder so,valve angle should also be considered.
JuliusCzar belcaP thanks sir..
Bike is TVS apache rtr200. Am Using it for dirt races from India.
It’s 4valve engine .
Sir can I have ur mail I’d or whatsapp num to share some pics and ideas...
@@ravikannan9425
I don't have a whatsapp but you can send me an email @ jjultaxinator@yahoo.com
Hey thunderhead298 I saw a guy doing a review on his Motorized bike. And it was the Motorized bike u sold to a guy last year u know that 29 inch black bike with the black motor what u built. So just thought I'd let u know the guy who bought it off u has a review off it on youtube
ill have to go find it, he didnt like the review and what i said about him (i didnt say anything rude) do you know the title?
+ThunderHead289 Motorized bicycle review. I think his Chanel name is Riley tucker
+crushh virgin thanks, I'll check it out
same for flat tappet motors?
Yes, exact same concept
Ok thanks when i built my motor the machine shop said to use my old push rods. Its a old 289 head with chevey valves and port work... good in the power department but sounds noisey. I did put new roller tip rockers on... i am definitely going to pull the valve covers off again and have a look to see what the contact patch is like and go from there..
that and make sure that they are adjusted properly. i have a several vids of doing this.