Thread: roasted my old engine, need advise for my new engine.

engine decided to drop a valve and the engine tried to compress it. piston didnt like that, so.....BAM went the engine. Found a used one from a 2003 GTP with 70,001 miles. doing a tear down and its getting all new gaskets etc...im letting the rockers go and going CAM! What kind of gains should I expect with a VS cam? I already have 90 springs and dont want to do any head work. What are your thoughts. What is the biggest cam I can go without head work?
thanks

What is required for the XP cam? I already have 90# springs from the Yella Terra set up. Will these be strong enough? I also purchased a Cloyes timing chain (single) and Cloyes dampner. Will the retainers from the YT set up work?

Originally Posted by Iceman6669

I would run the xp cam from zzp. A lot of people use it and have pretty good results with it.

Vs makes similar power under the curve and is easier on the valvetrain.

S1x its faster at the track thus the XP is a poor choice.

Unless you're after sound. Then you should use a nic or gt2.

Originally Posted by SleeperGS

What is required for the XP cam? I already have 90# springs from the Yella Terra set up. Will these be strong enough? I also purchased a Cloyes timing chain (single) and Cloyes dampner. Will the retainers from the YT set up work?

By cloyes, do you mean stock? If so yes, that'd be ideal. Just check tensioner in 30-40k.

Lsx retainers are required for those valve springs.

So....., the cloyes is going to replace the stock chain and dampner. i have ordered these. Are the LSX retainers that you speak of the same as the retainers that I purchased for the YT rockers? And are the 90# springs good enough. Sounds like I need to go with the SX1. Where do you get the SX1?

I need to go to 105's then and sell the 90# springs?

and the retainers for the YT's are the same I guess....I thought so on the retainers, but wasnt sure on the springs.

Supposedly the s1x results in lower et's

Originally Posted by BillBoost37

Yet...most of us drive on the street. For the little bit that it might be faster and being a bigger fan of Intense than ZZP (based on customer service that I received) I should be the first to push in one direction. Yet..if a deal came up on an XP, I'd suggest he takes it.

then run the vs. its cheaper and more dd friendly both to drive and on the timing set.

Originally Posted by copgtp

You'd be a fool to run aftermarket valve springs on a single chain and tensioner setup.....

You'd be a fool to run a double roller without ensuring it fits properly and having the gears hardened after machining.