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  Rocker arms...how much of a hp gain?

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Author Topic:   Rocker arms...how much of a hp gain?
streetstang67
Gearhead

Posts: 397
From: SC, USA
Registered: Nov 2002

posted 05-12-2003 04:33 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
I have the stock rocker arms now...not sure what ratio. If I upgraded to a 1.7:1 rocker arms, how much hp would I gain? Would my powerband change any?

------------------
'67 coupe: 289 bored .030 over, c-4 tranny
Holley 600 carb, edelbrock performer intake, hooker comp headers, dual flowmaster exhuast

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capri man
Gearhead

Posts: 6417
From: doerun, ga.
Registered: Nov 2000

posted 05-12-2003 04:57 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
my opinion, and you know about them!! lol
i think you would get a lot more hp out of a decent camshaft and would not spend 1/2 the money. good luck

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mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

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streetstang67
Gearhead

Posts: 397
From: SC, USA
Registered: Nov 2002

posted 05-12-2003 05:00 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
I know the camshaft itself is cheaper, but after installation, valve springs, lifters, retainers....it adds up. Just wondering if rocker arms would come close to a cam in power increase.

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clevelandstyle
Gearhead

Posts: 1035
From: Connersville, IN
Registered: Jul 2001

posted 05-12-2003 06:25 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
There is no good answer to your question. Nobody can tell you that you will get XX horse power from rocker arms. The truth it you could gain a few HP or none at all. The thing you have to ask yourself is, is it the right thing to do. My opinion. Yes! A good quality roller rocker will be better for your valve train. They should last for a long time. They are more accurate in ratio. Less friction. You can't really go wrong, even with the stock ratio. The only thing that hurts is your wallet.

Will you get as much power as a cam change? No. Very doubtful.
Just my opinion.

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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Big D
Gearhead

Posts: 5133
From: WELLS, NEVADA USA
Registered: Nov 2000

posted 05-12-2003 06:42 PM     Click Here to See the Profile for Big D   Click Here to Email Big D     Edit/Delete Message   Reply w/Quote
and,, if you have weak springs like the ones on my GT-40P heads,, it will definately cost you RPMs and Top End Power..

By the way,, Alex,, My Rockers,, springs,, etc came in..

Will install them this weekend..

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Don
'66 Fastback
302 with 5 speed
Royal Blue Metallic w/Ghost Flames
https://mustangsandmore.com/ubb/BigD.html
'94 Skidoo Mach Z, 925cc,, 175 hp,, 2" Camoplast Long Track..

"OK, So What's The Speed of Dark"..

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streetstang67
Gearhead

Posts: 397
From: SC, USA
Registered: Nov 2002

posted 05-12-2003 10:25 PM     Click Here to See the Profile for streetstang67   Click Here to Email streetstang67     Edit/Delete Message   Reply w/Quote
Are you saying it will lower my redline? I dont know if the redline really has anything to do with it, but wouldn't that hurt power rather than help it?

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