Speedometer Change has me puzzled
I'm still very new to the hptuners thing and I'm having a small issue here. Recently I went from the stock size tire of 245/50/16 which is a 25.64" tire to a 295/35/18 which is a 26.1" tire. If I go into hptuners for my camaro it lists the stock tire as being 24.91?? So I'm rather confused on what this means should I simply add 1/2" to the calculated tire in hptuners or what? Also will it automatically adjust my shift point if I have the auto scale feature checked off? Finally if for whatever reason I left my speedo stock will it have any real affects on shift points? After all the speedo is only off 1.1 mph at 60.
Thanks
speedo not working after tune change
I've had this happen to me on more than one occasion. I bought a tune from a performance shop and he emails me the file to load in using my HPTuners. Every once in a while, a new tune will make the speedo not work...at all...sits below 0 MPH and doesn't move. With that, the ABS & Parking break dash lights come on and stay on. In the past, when I revert to the previous tune or get another tune, the speedo works again and the ABS/break lights go out and all is right with the world. So I have loaded in a tune file that didn't quite suit my needs at one time, but do now...and the speedo isn't working, ABS/parking break dash lights are on :doh: . I looked at the previous tune to see if I could see something different that might cause this, but I see nothing. I even put the previous tune back in and the speedo still isn't working. I must be looking in the wrong place to correct this or am overlooking something. What would cause the speedo to not register :shrug: ? I am assuming it is all in the "speedo" field or in the "trans" field. I hope you can point me in the right direction.
Thanks