How do we get LS1 Rocker arms to fit?

[pgriffith]

Can I use LS1 rocker arm's? Just seems there are alot more options for LS1's and rocker's than us 3.8. I want to try maybe a 1.7 Rocker with my wimpy cam. I think it will help out for the small cam untill comp can get cores and it comes out. What options do I have other then Intense which are way to expensive?

[phoenix64]

GM did it so I'm sure you can, but I don't think you will get much horse power, by just increasing the lift. Do you have stock valve springs?

[pgriffith]

No im running compcams ls1 springs

[SLOWBRAEATER]

Whats the difference from the comps ls1 springs and toms lt1 competition springs?

[Dominic]

The comp springs are about 10-20lbs stiffer last I checked.

[DEE97GTP]

<blockquote>quote:</font><hr>Originally posted by pgriffith:
Can I use LS1 rocker arm's? <hr></blockquote>


THIS might help.

ZZP sells rocker arms in 1.75:1 ratio.

DEE

[pgriffith]

How much lift is too much? I have such a small duration cam anyway I am thinking about lifts near .540 with a 1.75 Rocker. IS that too much?

[Zooomer]

In stock form the L36 springs can go to about .520-.540 before they will start breaking. The problem is that the valve guide seal will start to mush around .505 lift or so. They are rubber so they do take some abuse but will fail with time if you smoosh them. Since we have hydraulic lifters that like to bleed down you can run a cam/lifter combo to around .525 and not have too many issues.

[Dominic]

That is good to know - Is there any way to get 1.5:1 ratio rockers?

[pgriffith]

so how much lift would be able to handle with some Compcam valve springs like the ones I have?

[3800FLSixer]

ok, I went to the zzperformance website and saw the rockers which looks good...now my question is I also saw a HI-Velocity TB for $180...at the bottom it lists the f-body as an application...does thing work/fit?...any one have it? I also saw UD pulleys for WP/Alt...I know we're UD from factory, but are these a valid replacement or are they different components on a GP?

[SLOWBRAEATER]

I would get the underdrive pulleys every little bit will help. You will get a response from some people saying they are worthless but i guarantee that same person never actually used the ud pulleys to prove his claim. Some guys only say things dont work just because they heard it from another guy who never used the pulleys