silvertsi
New member
I have a sr20det blacktop from 180sx the engine is stock, stock injectors, stock ecu, I got t28bb, front mount, 3" exhaust, and other bolt on mods, I turn the boost up bit by bit and the AFR is reading good as I go up, I got up to 20psi and its reading an AFR around 12 runs fine no knock no detonating no problems, is it normal to have an AFR of 12 on stock ecu/injectors like this? btw I run petro canada 94.