Hey guys, recently I was comparing a few dyno charts and one of them had an AFR of 13.5 low end around 2k to 3k rpm. I'm a noob but how lean is too lean? And how far can we go? Thank you!
My car now is running a stock ecu but with some upgrades. Im not too sure whether i can just leave my ecu stock or shoudl i buy a e-manage or something.
