Rocker change on LT1
Burning Brakes
Joined: Apr 2002
Posts: 934
Likes: 0
From: MO
Re: Rocker change on LT1 (T1Kilr)
I changed mine and added an adjustable fpr turned FP down to 39psi and
the combo picked up 3th's in the 1/4. Those were with Comp roller tip 1.6's, I am going to upgrade to a full roller soon. So maybe you could get a little more due to less friction on a full roller. But I was very happy with the combo I did! :cheers:
the combo picked up 3th's in the 1/4. Those were with Comp roller tip 1.6's, I am going to upgrade to a full roller soon. So maybe you could get a little more due to less friction on a full roller. But I was very happy with the combo I did! :cheers:
Thread Starter
Drifting
Joined: Mar 2002
Posts: 1,254
Likes: 0
From: Waterford MI
Re: Rocker change on LT1 (Red96Coupe)
Did you have any problems with too much lift/ piston clearance? Were there any ill-effects from this mod?
[Modified by T1Kilr, 2:43 PM 6/12/2002]
[Modified by T1Kilr, 2:43 PM 6/12/2002]
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Re: Rocker change on LT1 (T1Kilr)
Did you have any problems with too much lift/ piston clearance? Were there any ill-effects from this mod?
[Modified by T1Kilr, 2:43 PM 6/12/2002]
[Modified by T1Kilr, 2:43 PM 6/12/2002]
Heel & Toe
Joined: May 2002
Posts: 20
Likes: 0
From: Henderson NV
Re: Rocker change on LT1 (Glock'94)
Well I have Heard from Chevy Tech reps that a stock LT1 will need the 1.5 ratio rockers for safe and optimal valve clearance and peformance gains,If Ya got ported Heads or HP heads ,well then the ratio changes,springs and rockers will change then,but as far as stock goes...1.5...... :chevy :cheers:
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Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Re: Rocker change on LT1 (FordNoMore!)
Well I have Heard from Chevy Tech reps that a stock LT1 will need the 1.5 ratio rockers for safe and optimal valve clearance and peformance gains,If Ya got ported Heads or HP heads ,well then the ratio changes,springs and rockers will change then,but as far as stock goes...1.5...... :chevy :cheers:
Burning Brakes
Joined: Jun 2001
Posts: 838
Likes: 2
From: Out by the bridge again, TampaBay
Re: Rocker change on LT1 (FordNoMore!)
Well I have Heard from Chevy Tech reps that a stock LT1 will need the 1.5 ratio rockers for safe and optimal valve clearance and peformance gains,If Ya got ported Heads or HP heads ,well then the ratio changes,springs and rockers will change then,but as far as stock goes...1.5...... :chevy :cheers:
Not true. Use self aligning rockers or use hardened pushrods and guideplates with non-self aligning rockers. CC pro magnums are the best for the cost.
Like Red96 said you'll have to trim the drip tabs in the valve covers. Going to 1.6 just gives a little more lift to the cam, not anywhere near enough to cause interference with a stock cam. It's an excellent mod if the LT1 is already breathing well and has headers or less restrictive exhaust. You will see gains.
Thread Starter
Drifting
Joined: Mar 2002
Posts: 1,254
Likes: 0
From: Waterford MI
Re: Rocker change on LT1 (Half Fast)
Ok, it seems to be a simple mod, that should work with my exaust (no cats, bought it that way) How difficult is it to do with the heads on the car? Any special tools that I would need? Any PROM changes required or different fuel pressure?
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Re: Rocker change on LT1 (T1Kilr)
Ok, it seems to be a simple mod, that should work with my exaust (no cats, bought it that way) How difficult is it to do with the heads on the car? Any special tools that I would need? Any PROM changes required or different fuel pressure?
The only special tool I needed was a valve spring compresser. I used a loaner from Autozone. However, if you have access to another valve spring compresser get it, the one from AZ is a piece of crap.
