1.6 ratio comp cams roller rockers on a 3.8??

[Shane]

What kinda gain would I see with these roller rockers on my 3.8?? Anyone have these and seen a gain??

[ May 23, 2002: Message edited by: Shane ]</p>

[PiLOTLiTE]

I don't think you would see much, I believe we already have hydraulic 1.6 roller rockers in our motors.

[strange_trp]

duration better than lift... (to a point of course)

[Magnus]

We have hydraulic roller lifters.

Our rockers however are not roller. But they are 1.6:1 ratio rockers.

Switching to a roller rocker of the same ratio would only be worth a few HP. Not worth the $$$ at all.

Reasons I would switch to a roller rocker is to quiet down the dang valve train after a cam swap.

[1htv6]

What about some other ratios? Do they even make roller rockers for out car? Where can I buy them?

[DominusEtDeusNatus]

I think ZZ performance sells any ratio you want from 1.6 to 1.9.

[PiLOTLiTE]

<blockquote>quote:</font><hr>Originally posted by Magnus:
We have hydraulic roller lifters.

Our rockers however are not roller. But they are 1.6:1 ratio rockers.

<hr></blockquote>


You learn something new everyday.
:D Thanks Magnus.

[AMinor65]

http://3800performance.com/

They'll even have aftermarket pushrods by this summer if you can wait. Give a little more stability with the high lift and all. :D

[mike malloy]

what if i were to put in 1.9 roller rockers and a ssm cam.. what kinda of gains would i see. i want to build the perfect valvetrain, but i'm clueless..

[AMinor65]

<blockquote>quote:</font><hr>Originally posted by mike malloy:
what if i were to put in 1.9 roller rockers and a ssm cam.. what kinda of gains would i see. i want to build the perfect valvetrain, but i'm clueless..<hr></blockquote>

Mike I'm pretty clueless on this one too, but you might want to chat with Dom. He was thinking that if he used a less extreme aftermarket cam, he could make up some lift with higher ratio rockers. Contrary to popular belief, rockers do alter the duration along with lift, albeit slightly.

[phoenix64]

there is an interesting article in hot rod magazine this month where they test stock rockers, the factory pieces that were rated at 1.6 ratio actualy scored 1.45-1.55 none actualy had 1.6. the crane stamped, not roller, rockers they tested had 1.6-1.66 all the way throught the lift curve. So it might be a good idea to replace them with 1.6's any way.

[mike malloy]

yea i'm going to have to start studying. i want to build up my motor in sept and i want to do it right. hopefully by then there will be more info in the technial database

[Patrick Javert]

I wouldn't suggest getting the new rockers unless you have done at least intake, exhaust, ignition, and maybe a chip or programmer. intake and exhaust to let more air in and out of the engine, ingition so that you are lighting off the entine mixture and not just some of it, and a chip/programmer to adjust air/fuel mixture, ingition timing, shift points, and shift firmness. Then the rocker arms would be a good idea. I'd get new springs and titanium retainers along w/ the roller rockers. I suggest this because it's easier and cost effective to put in new springs and retainers while the mechanic already has the rockers and valve covers off. the retainers will help prevent valve float at higher rpms due to less inertia, and the springs will force the valve to close quicker, also reducing valve float.