Originally posted by 99Formula
Another one of the Vegas crew here... Yes, 91 octane does suck pretty hard. Right now I'm getting 16 psi with O2's about 780 and 0 kr on a 92 octane extender chip. Jojo, I have a Ramchargers 93 octane street chip that seems to work really well out here you are welcome to try out and see if it helps any. Also, you might consider taking your car to Len at Performance Transmission to have him tune it for you. He knows these cars.
Peter