You make 2 good points.

 

we may try that but there is an ms4 and some new heads awaiting install so im not sure that the record will be to much of a worry anymore.

 

I have seen cars run lean like that on top before and it was the fuel pump that couldn't keep up. Hard to check the pressure at high RPM under load so it was hard to diagnose - just a thought, hope it helps.

Damn strong numbers regardless, sure the "previous owner" didn't drop a baby cam and LS6 intake in there?

 

i would've thought that to but it peaked power at 5300 lol

 

I made 354whp with an slp lid, slp maf, and a magnaflow catback.

2002 Z28 M6.

Probably would have hit those numbers with LTs and tune.
Good numbers man!

 

dang you sure u didn't special order a ls6 car. lol