LSX_NUT

I have a 2002 Z06 with 21k miles on it. It put down 364rwhp bone stock. I just recently bought American Racing Headers w/ catless Xpipe, Callaway Honker intake, and PAC 1518 springs.

I'm getting everything installed and tuned in a few weeks. What kind of hp/tq gains will I pick up? More importantly, will I be able to feel the difference in the seat of the pants?

LSxFTMFW

386.5 at the wheels. Yes, it will be faster because it will be louder. Louder = faster. Ask any ricer Congrats on the mods! Enjoy!

envyz06

38x would be normal

Water_Walker

It will be 380-390 and you will mildly fee the difference. The sound will change a lot.

LSX_NUT

i'm hoping for 390ish but I guess we shall see in a few weeks. I'll add results to this thread when I get the car back.

I'm wondering If I should do a ported throttle body at the same time.

z06scentair

Stainless works 1 7/8 with catted 3 inch x and vararam made 372 hp, 359 tq. This was on a dynojet. My cars has chrome aftermarket z06 wheels which could have robbed a few ponies.

LSX_NUT

What were your before numbers? I'm assuming the average bolt ons give a 20-30rwhp gain?

z06scentair

Didnt dyno before, most make 350 hp.

JeremyGSU

Here are my numbers from every dyno my car has had.

2/12/08 stock baseline @ Carolina Auto Masters
359whp / 347 tq

After tune same day and air duct
366whp / 358 tq

3/6/12 - owner now me - dyno'd by Jeremy Formato in Gainesville
mods:
Vararam intake
160 degree thermostat
tune
dyno'd on 305/35/18 Nitto NT555R2's
68 degrees

376whp / 364 tq

3/13/13 - dyno'd by Jeremy Formato in Tampa
mods:
NGK TR6 spark plugs
Vararam intake
160 degree thermostat
Kooks 1 7/8 headers, no cats
bored out throttle body
dyno'd on 305/35/18 Nitto NT555R2's
73 degrees

392whp / 377 tq

So from stock until now I picked up 33 hp and 30 lb/tq.