So a good friend of mine has a GMC Typhoon completley built motor and larger turbo. We take it to the track and ran a 11.9 on street tires pulling a 2sec 0-60. The problem we are having is noone can tune the OBD1 computer because its writen in hieroglyphic's. We know there is plenty of potential to be unlocked with a tune but because of this we cant discover it. Has anyone adapted an OBD2 computer to an obd1 motor??