Originally Posted by GHO5T5NIPER
Hey guys I got 315-35-17 tires recently installed and they didn't throw the speedometer off at all so I just left mug bama tune the way it was. I just had bama write me a new tune because I wanted the 2 step launch and I decided to put my new tire size in the new tune just because . Well dummy me accidentally put 315-45-17 instead of 315-35-17. Speedo was off my. About 4 mph. I read on the internet that my wheels reved at 810 revs per mile. I tried that and it was further off. Also read it was 785 revs per mile. Changed it in my tuner manually and it was still off. When my speedo showed 60 mph my gps showed 40 mph at 1,000 rpm. They are now writing me a new tune but won't be here until monday. Sucky thing is I was headed to the strip today to test it out. I could run it with the speedo off but it throws the miles on my odometer off and that really bothers me. Anyone have any experience changing the revs per mile and would know why mine is so off even after I changed the revs?
I'm sorry for the mistake with your tire size. The Bama team can definitely write you a new tune that will fix this. It's a very quick fix!
I'm also sorry that we couldn't help you out over the weekend. Has the Bama team got you squared away now? If not, shoot me a PM with your order number and I'll make sure you're taken care of right away.