blacknsilverz

i took my 97z28 to the dyno and it made 241hp and 281tq then i put pasesetter LT, pasesetter y pip , ngktr55 plugs , tyler 8.5 wires ,got a madz28 tune then i had it dyno agen and then i made 256hp and 283tq my a/f was 11.6 can any one tell me what happed of the top of there head if so let me know thank you

OBE1 95Z28

AFR of 11.6 is way too rich for a normally aspirated engine. Talk to MadZ28 about the tune.

93redBirdMan

wow 11.6?? Mine was 13.1. Yea yours is waaay too rich. I'm guessing you have a sensor bad somewhere or something cuz i doubt he'd mess up your tune that bad ya know?

blacknsilverz

before the tune the a/f was not reading when i was geting it dynoed it droped down blow 9 after the tune it was 11.6

blacknsilverz

right now im geting about 12mpg