rocker arms
Supreme Member
iTrader: (1)
Joined: Dec 2006
Posts: 2,403
Likes: 4
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 .
Thread Starter
Member
Joined: May 2010
Posts: 198
Likes: 0
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?
Moderator
Joined: Jan 2000
Posts: 20,981
Likes: 11
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.
Thread Starter
Member
Joined: May 2010
Posts: 198
Likes: 0
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?
Thread
Thread Starter
Forum
Replies
Last Post
92rsvortec350
Engine/Drivetrain/Suspension Parts for Sale
19
Oct 9, 2015 09:39 AM
