EveeSTi

Hello all, I am looking at building up an LQ4 (from a yukon, 70k miles on it, aluminum heads) to a target of 500hp.

The way that I was planning on doing it was to go the Car Craft route and get :

L92 Heads
Comp Cams XR281HR
New rocker arms
LS6 Valve Springs

I was hoping to stay EFI

Are there any more cost effective ways that you guys know about to get to around that #? I'd be satisfied with anywhere in the 450-550 range, no bottle.

Also do you think that motor needs any reconditioning at the 70k mark? If so what do you suggest? Thanks

black_z

iTrader: (4)

I would go with a different camshaft, and better springs. The engine will be just fine with only 70K on it.

s346k

iTrader: (4)

you only need l92 intake rocker arms and pedistals. you can reuse your old exhaust rockers off the heads you have now.

i'd also opt for a better cam and better valvesprings, you can easily make more than 500hp with a bigger/better cam. you'll need headers and an l76/carbed l92 intake, as well.