Would it be a good idea for Thunder to change the speedo gear also??? I'm thinking of 3.73's cause I do ALOT of highway driving, but would I need to change the speedo gear? I'm going with 4.10's in my 5.0 stang cause it's never driven. I'm happy with my custom chip from Dennis Reinhart, but I don't think I'll do business with him again.
Yeah the JET modules suck. My friend bought one for his '01 Cavalier and it made it slower. He runs a 10.230 on the 1/8 mi. w/o the JET and w/ it he ran 10.5's on 1/8 mi. It made it run way too rich and always turned the Check Engine Light on. Get rid of it. I'm getting 10.074 on the 1/8 (i think) @ 74mph.