Originally Posted by gsfent

It seems like Jan did the tune. Why not contact him? Seems like you have enough injector (550).

Idle AFR too low, WOT still too high. Numbers should be reversed.

If you are seeing 16 or 18 on a dyno, the car should run like crap and not sound much better. You are WAAAAY lean and you would be able to hear it.

Regards,
Jerry

Originally Posted by PeanutR53

FUEL SYSTEM 1 says “CL” on scanner. I assume it means closed loop.
Here is my build. Let me know if there’s anything that would cause this lean mixture.

Newly built motor.
CP pistons
Carrillo rods
17% pulley
Rebuilt/ported/polished factory supercharger
ATI crank pulley
Balanced/polished factory crank
RMW Big valve head
RMW shorty header
AEM wide band after flex pipe
550cc injectors
Newman 272/450
Ported intake manifold from Thumper
Forge top mount intercooler
DDM intake
Detroit tuned BPV
BKR7EQUP 4285 NGK plugs
Screamin Demon coil pack
MSD plug wires
RMW 550cc tune
AC removed
CSF radiator
All sensors are brand new

Thats all I got for the motor. About 10 hrs on motor. The rest is just accessories