Hey guys,

Extremely new to the EFI live and LS1 community. Recently dyno'd my car and was not able to get full runs down without pinging after 5.6k RPM. As you can see in the graph power output starts to drop likely due to the ecu pulling timing as a result of the pinging. I very much would like to increase afr around that RPM range in hopes of resolving the pinging. I don't have a wideband and would like to make changes based on the dyno graph then redyno and fine tune afr from there if necessary to solve pinging. I have been searching around the forums to learn about a/f tuning but am still a bit lost. It is my understanding that at WOT PE modifier based on RPM would take over to help manage afr which is complemented by the VE main table. Could I just change the PE modifier based on RPM from 4000 to a figure that would drop the afr .5 to reach a value closer to lbt without needing to adjust the VE main Table? Catalytic Converter Protection is on, would turning this off help? According to the dyno my afr was averaging 14 to 13.5 at the higher RPM range. I was hoping that I could just add a little bit of fuel to get closer to a 13:1 ratio that would fix the pinging problem and help pull out slightly higher numbers. The PE numbers are varying greatly from the dynojet afr gauge. I am thinking this may be a combination of my mods plus the minor variance in head/cams between a 2000 and 2002 LS1?



Would the changes, noted in parentheses, richen up my afr and solve my lean/pinging issues? Or am I better off subtracting a % of the main ve table? If I am totally off in the wrong direction please guide me to the right path.

PE Modifier Based on RPM Value
0 0.82
400 0.82
800 0.82
1200 0.81
1600 0.81
2000 0.81
2400 0.81
2800 0.81
3200 0.81
3600 0.8
4000 0.8 (.79)
4400 0.8 (.78)
4800 0.8 (.77)
5200 0.79 (.76)
5600 0.78 (.75)
6000 0.78 (.75)
6400 0.78 (.75)
6800 0.78 (.75)
7200 0.78 (.75)

2000 Camaro Z28 M6 Drivetrain
2000 ECU reflashed to 2002 for emissions reasons
2001 Exhaust Manifolds (EGR delete AIR blocked off)
LS6 Intake Manifold
K&N Intake
Custom 3" Magnaflow Exhaust System, x pipe with quad cats

Again very new, need lots more learning but any help is greatly appreciated. Thanks.

-Shaun