Bought a Gtech pro rr and I know there is no way my car runs 16.8 to 18s. Have a 1991 VG 5spd Fidanza flywheel, Unorthodox Pulley, Timing advance, Ram air, and magnaflow cat. Point is can not get this thing to get an accurate reading went throught the book and still no luck. Did have one run saying I have low 200 hp and ran 15.098 but seems strange. Any ideas?

 

Ya i got a Gtech for my maxima as well and had probs

I got a good model tho: link