Push rods or roller tip rockers
Thread Starter
Racer
Joined: Aug 2019
Posts: 253
Likes: 24
From: Oklahoma
Push rods or roller tip rockers
Does anyone know what the difference is between changing roller tip rockers or changing pushrod length to gain hp? I called edelbrock and they said I could get appx 25+ hp by changing to 1617-18 rockers ($500+) and I wondered if you could get same results from less expensive pushrods. Thanks
Burning Brakes
Joined: Aug 2011
Posts: 831
Likes: 288
You are not going to get 25 HP boost from those rockers. Not even 5. They reduce wear on the valve train not necessarily increase power. If you went to 1.6 ratio rockers then yes you will increase power. The amount depends on what your engine setup is.
Do not change push rod length unless the vale train geometry is off. You will cause more problems then you could imagine and even break pieces or kill the engine.
Do not change push rod length unless the vale train geometry is off. You will cause more problems then you could imagine and even break pieces or kill the engine.
Thread Starter
Racer
Joined: Aug 2019
Posts: 253
Likes: 24
From: Oklahoma
[QUOTE=bonesbrakr;1607106169]You are not going to get 25 HP boost from those rockers. Not even 5. They reduce wear on the valve train not necessarily increase power. If you went to 1.6 ratio rockers then yes you will increase power. The amount depends on what your engine setup is.
Do not change push rod length unless the vale train geometry is off. You will cause more problems than you could imagine and even break pieces or kill the engine.[/QUOTE
I really didn’t believe the person at Edelbrock which is why I asked on the forum. Thanks for replying
Do not change push rod length unless the vale train geometry is off. You will cause more problems than you could imagine and even break pieces or kill the engine.[/QUOTE
I really didn’t believe the person at Edelbrock which is why I asked on the forum. Thanks for replying
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
The Comp roller tip units are a solid upgrade as the stock rockers can be anywhere from 1.4 to 1.5 ratio.......they are worth power to a stock setup albeit only a few....maybe 10hp depending on how shitty the original rockers are.....
The advice on pushrods is correct.....different length pushrods do not change lift or enhance anything.
This hobby is chock full of misinformation.....coming from "Legends" to the suppliers to keyboard warriors on FB......Edelbrock should be reprimanded for saying **** like that.....
Problem is that the stubborn novice will adopt a "Why would the manufacturer be wrong or lie to me?" type of stance.....and nor I or anyone is able to help people like this.......its kinda terrible and frustrating.
Jebby
The advice on pushrods is correct.....different length pushrods do not change lift or enhance anything.
This hobby is chock full of misinformation.....coming from "Legends" to the suppliers to keyboard warriors on FB......Edelbrock should be reprimanded for saying **** like that.....
Problem is that the stubborn novice will adopt a "Why would the manufacturer be wrong or lie to me?" type of stance.....and nor I or anyone is able to help people like this.......its kinda terrible and frustrating.
Jebby
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Back in 6th grade, the teacher was explaining how just one sentence could get so obscured in transferring. As a demo, he whispered about a ten-word sentence to a student, and they were to "pass-it-on" to the next student. By the time phrase got all the way around the room, it was so mucked up that the entire class broke out in laughter. And each student claimed: I never said that!
Edelbrock might have said: Two-point-Five Horse Increase. (But never 25)
Edelbrock might have said: Two-point-Five Horse Increase. (But never 25)
Thread Starter
Racer
Joined: Aug 2019
Posts: 253
Likes: 24
From: Oklahoma
Back in 6th grade, the teacher was explaining how just one sentence could get so obscured in transferring. As a demo, he whispered about a ten-word sentence to a student, and they were to "pass-it-on" to the next student. By the time phrase got all the way around the room, it was so mucked up that the entire class broke out in laughter. And each student claimed: I never said that!
Edelbrock might have said: Two-point-Five Horse Increase. (But never 25)
Edelbrock might have said: Two-point-Five Horse Increase. (But never 25)
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Brett Foote
Safety Car
Joined: Aug 2001
Posts: 3,683
Likes: 202
From: Waterford Mi
I like the way people say “up to” in regard's to hp increase. It’s a good selling point but never true.
air cleaners, power chips, and other performance enhancements are sold saying they are better but few do anything more then take your money.
just add a few stickers and you might go faster.
air cleaners, power chips, and other performance enhancements are sold saying they are better but few do anything more then take your money.
just add a few stickers and you might go faster.
Safety Car
Joined: Sep 2005
Posts: 4,222
Likes: 643
From: Orange County Ca
Marketing, internet "truths", forum garus, etc., can really mess you up. It's good to ask, but hard to sift through all the bs.
My $.02.
Roller tip rockers have been proven to provide little to no advantage. I saw a youtube video where it showed the roller tip just sliding over the valve stem tip, not rotating. Maybe just this engine or most or all??
Anyway, my '08 436hp ls3 engine does not use roller tip rockers. It does have roller rocker piviot shafts.
New rocker arms?
I seriously doubt that you would get or notice any improvement. Waste of time and money as long as yours are not broken.
My $.02.
Roller tip rockers have been proven to provide little to no advantage. I saw a youtube video where it showed the roller tip just sliding over the valve stem tip, not rotating. Maybe just this engine or most or all??
Anyway, my '08 436hp ls3 engine does not use roller tip rockers. It does have roller rocker piviot shafts.
New rocker arms?
I seriously doubt that you would get or notice any improvement. Waste of time and money as long as yours are not broken.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
With a SBC bored, stroked, 11:1 pistons, knarly cam, headers, 64 chamber / 200 cfm heads, and a 780 CFM Holley carb, then yes.
You might gain 25 horse.
Stock or near stock engine. Not going to happen.
If it were that easy, GM would have done it 50 yrs ago.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Marketing, internet "truths", forum garus, etc., can really mess you up. It's good to ask, but hard to sift through all the bs.
My $.02.
Roller tip rockers have been proven to provide little to no advantage. I saw a youtube video where it showed the roller tip just sliding over the valve stem tip, not rotating. Maybe just this engine or most or all??
Anyway, my '08 436hp ls3 engine does not use roller tip rockers. It does have roller rocker piviot shafts.
New rocker arms?
I seriously doubt that you would get or notice any improvement. Waste of time and money as long as yours are not broken.
My $.02.
Roller tip rockers have been proven to provide little to no advantage. I saw a youtube video where it showed the roller tip just sliding over the valve stem tip, not rotating. Maybe just this engine or most or all??
Anyway, my '08 436hp ls3 engine does not use roller tip rockers. It does have roller rocker piviot shafts.
New rocker arms?
I seriously doubt that you would get or notice any improvement. Waste of time and money as long as yours are not broken.
Jebby
.
Is my vette stock?? HAHA
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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I could see a performance engine with a small cam gaining 25hp with a rocker change....from a 1.5 to a 1.7....but not a stamp to roller tip.
Race Director
Joined: May 2006
Posts: 18,710
Likes: 2,574
I read through this thread and putting aside what works or doesn't work, the phone number listed is for Edelbrock but the part number listed looks like a Competition Cams number but they don't have a part number with a -18 suffix. So what am I missing here? Did the OP call Edelbrock concerning another companies product and where was that part number found?
Race Director
Joined: May 2006
Posts: 18,710
Likes: 2,574