Wow yea looks like it was running pretty lean up top. Might wanna get that fixed.

 

If that A/F ratio is correct I can't believe the dyno operator didn't abort the pull.

 

What he said!!! Thats way too lean. That could be why your curve is all choppy looking too. Do you know what your fuel pressure is also while making the runs? It would appear you have some issues to address. It will make more power then that. I wouldn't hammer on the car for now though until you get that A/F down first.

Ken R.

 

In addition to scary AFR, it should pull to at least 6k. Possible valvetrain problems?

 

Isn't the target A/F for LT1's 12.7? The lower the number the richer the condition. Not the other way around. That power curve is peaking way too early though.

 

i did a fuel pressure test today and when i got on it fuel pressure would drop gradually to 20psi as rpms would climb, so ive been told it was the fuel pump. any one have any recomendations on what brand may work the best? i also have hard starts, and the valve train might need some adjustment, for the rockers i heard 1/4 turn is plenty from 0 lash im currently on almost a full turn off of 0.