Quote Originally Posted by FordMan77 View Post
Do you have a way to monitor for KR? If not, then I'd start with the stock 3.8 pulley. You don't want to drop pullies on something that you have no way of seeing how much KR you have right off the bat or you'll be chipping pistons in no time, especially with the higher comp. Are you going to use a GTP ECU or modify your GT ECU?
Yeah I have a scanner. I use torquepro with Bluetooth obd adapter. That's how I learned that adding a fwi reduces knock. I was seeing up to -5 , now rarely see -1.

This is an 01 impala, stock l36. It will be fully tuned. Tuner will flash my pcm well enough to get 30 miles to his shop. Then he will dial it in there.

How are guys pulling off a 3.4 with such minor mods?