307 hp dyno run. What's wrong?
 

Anyone... I recently installed AFR 205s and a 224-228 Comp Cam on my 2000 C5. It already had a 80mm BBK throttle body, long tube headers, and a Z06 exhaust. My last dyno run didn’t seem any different than my original heads and cam except now I have the sewing machine noise. I know this is expected, but the real problem is my 307 hp dyno run. Even at the Denver elevation, I was hoping for over 400 corrected. Have you heard of this problem before and what do you think is wrong?

Other notables: We were using a Predator Diablo. Very limited in adjusting the tune, but you probably already know that.

Thoughts?

Ditch the Predator and go back to stock and start tuning from there. You should be at 420-430 corrected.

Yeah, something isn't right. You should be over 400rwhp. :drive:

What was your AFR at?