2005 g35 coupe stillen stage 3 supercharged is running lean. Just had a dyne done on it. It was 12 to 12.5 on the air fuel. Is this a safe number for this car???

Welcome to NICO! Congrats on the cool car.
12-12.5 could definitely be improved. You want something more in the 10-11 for a safe afr. Stay out of boost and get a re tune and/or some bigger injectors and/or fuel pump if you haven't already.

what was the ratio across the board? But def get the number in a better range for longevity of the motor

From 3000rpm to 6000rpm it is pretty flat in the low 12's. At 6500rpm it ia right at 11 to 1. Not to many people in my area are familiar with this stillen supercharged engine. Just wondering what things I can do too help fine tune this AFR. I CONTACTED STILLEN and they didn't have a problem with these numbers I'm getting on the dyno.

That's not too bad accross the board. At the high end you dont want to be at 12s but 11s is better. Where are you located?

Massachusetts how about yourself?

I'm in CHicago. I am supprised yo can not find a tuner in that neck of the woods.

Plenty of shops but not familiar with this setup. My system has a seventh injector with ecu already tuned from stillen. Is yours the same way? So a shop can't tune it.

no. I have the GTM supercharger. What about Dent Sport Garage? they deal with a lot of nissans?