KCS

iTrader: (20)

Yeah, a FAST would make some more power but he should already be making more with the combo he has.

axld

good numbers ! yea there is always room for improvement as money allows. starting my own 6.0 build myself.

allblackedout5

iTrader: (18)

OP nice combo... very very similar to mine. I made 425rwhp on a bone stock 70kmi 2003 lq4, ported 243's with 2.02/1.60 valves, tsp 228/232 .600/.600 112+2 cam, and ls6 intake. That's through a 4l60e with precision 3500 stall and 10 bolt. TSP long tubes and true duals. This was on a dynomite dyno.

I have since upgraded to a fast 92 and nick williams 92 and a dana 60 rear end and added a cage... I will say I dropped an average of 0.205 seconds off my all motor times at the track and nearly .400 seconds off my nitrous times without even a re tune and it pulls much harder into the higher RPM's... I plan on getting back for a touch up to the tune and a new dyno pull soon. I will post up results, may give you an idea of what you're really looking to gain.

99 Black Bird T/A

iTrader: (4)

Ozzie what was the A/F ratio at peak torque and peak hp?
I couldn't quite make that out from the pictures.

big hammer

http://www.hotrod.com/articles/20-ls...ds-tested/amp/

big hammer

Are the headers mid lengths?

Bspeck82

Perhaps the op doesn't want to spend 800+ bucks for 15 horsepower. The ls6 works well for the money. Id spend that money on suspension instead.

big hammer

*30-35 hp

Tuskyz28

Bingo!!