rocker arms
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Joined: Dec 2006
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From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: rocker arms
yes , the most popular i feel are the 1.6 roller tips . comp cams 1416-16 are a good choice . i have those myself . a good time to change valve seals . but , don't expect a seat of pants difference in performance . good luck .
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Joined: May 2010
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Re: rocker arms
Well for my 89 the intake is intake .234 exhaust .257 lift for the tbi motor.
So my question is with flat top pistons and the 9.3:1 compression ratio what is the max lift you can run on these engines?
So my question is with flat top pistons and the 9.3:1 compression ratio what is the max lift you can run on these engines?
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Joined: Jan 2000
Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: rocker arms
On stock engines, it's the valve guide clearance that limits things, not the piston-to-valve clearance. You can get around .475" or so, depending on tolerances, before the retainer smacks into the valve seal.
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Joined: May 2010
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Re: rocker arms
If that where the only thing then I could run a 1.8 rocker ratio and my engine isnt that old so valve guides wont be an issue.
Because my exhaust lift would only be .462 so what do you mean by valve guide clearence?
Because my exhaust lift would only be .462 so what do you mean by valve guide clearence?
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