Finally got the OTTP stage 2 installed along with a stage 1 ZZP heat exchanger. I went with the 2.8 and 60 lb injectors. The only other mod I have is a ZZP 3" catted downpipe (into a 2.5" stock cat-back). The car was dyno tuned by Jeff Creech of Carolina Auto Masters in Durham, NC. It was 96 degrees with high humidity while he was tuning it, but she still pulled off some good numbers. It made 241 WHP and 220 WTQ. It would of most likely have made well over 250 on a cooler day but its fine with me, as it gets cooler out the car will get stronger. My car is a 2006 btw with LSD. He ran the timing up to about 17 degrees, but could tell it was getting close to detonation so we didn't push it. All I can say is that the car is a completely diffferent machine now. He uses HP Tuners and is an awesome tuner if anyone is looking for a good place to get tuned near Raleigh, NC. Here's a couple vids I got...

http://www.streetfire.net/video/coba...no_2031693.htm

and...


http://www.streetfire.net/video/coba...no_2031905.htm

 

I dyno'd the same in oct but without cooling mods

 

Who tuned for you?

 

I dynoed 250whp with i/h/dp/catless, gm stg 2 with 2.8 and timing bumped to 20ish, stock cooling

this was in 80ish degree weather with high humidity as I am in fl.

 

Whoa, thats a lot of timing Stonny! I was wondering how much a header and going catless would help me. I know you can't compare one car to another, especially on different dynos on different days, but looks like I would pick up about 10 whp or so with the header and running catless.