Got my 09 SS/TC onto the dyno today for the first time. Proved to me that my locked Trifecta tune that my car had prior to my ownership doesn’t appear to be cutting it with the mods I have put onto it since getting it. Too much air now and not enough fuel. It appears the car is running too lean (13.5 AFR) being others have told me with my mods I should have been able to put down over 300whp? Another tuner of these cars suggested I should be in the mid 12’s range for AFR? I am still happy with what I saw it just now I have to get the ball rolling on getting my PCM unlocked so I can use my HP tuner to fine tune the car with the current mods. Also while on the dyno could smell some clutch so I suspect that won’t be lasting forever. But with 123K I can’t really complain.

Car put down 292WHP/315Torque

 

Numbers look a little low for mods but would still be a blast.

 

yeah your a/f is off.....a good hptuner tuner should should be able to correct it and help bump up the powah! still pretty good numbers for 123k. Makes me feel good about pushing power at 108k

 

Ideally what AFR do these LNF's like?

I own an HP tuner its just currently my PCM is locked. But I am hoping 1 of the 2 GM dealer sources this week can hook me up flashing my PCM back to stock so I can start manually tuning it myself.

 

Since adding mods did you have trifecta retune??

 

0.86-0.88 pe lambda or 12.6-13.0 a\f on gasoline.

 

^This....

Keep in mind that most tailpipe sniffers tend to run a few tenths leaner than what you're actually registering at the wideband further upstream by the turbo. So the 13.2afr you're showing in the graph is realistically probably closer to 12.8afr, which is right about where it should be for a lnf. As far as power numbers being low, it's really only relative to the dyno you run on. You can only base dyno numbers on gains, not just peak numbers.

 

this I was gonna say right in there at 12.6-12.8