ok i just installed a NXmaf +genXII in my car, also did the racetronix fp kit.
the motor in now is stock, (building a forged 383)
heres the chart & jets that came with the kit
HP N20 fuel
50 35 18
75 41 22
100 52 28
150 62 35
200 78 44
250 88 46

i have the jets for a 100shot in, right now.
when i squeeze all it does is cough, sneeze, ****, & then yell out a mean back fire. im new 2 N20, so all help would be greatly appreciated. the tuner that installed the system thinks its too much fuel, tech at NX said it was not enough fuel. what should i try? or are the jets all wrong? i do plan on blowing the crap out of this motor but not till my stroker is completely done, and in the mean time i just want 2 get this juice running semi right w/o coming out the pocket. any suggestions?

 

borrow a wideband from someone or get to a dyno.
also make sure the fuel is working properly and get a fuel pressure gauge and strap it to the windshield.