Programmer speed

[02duramax]

I have had the superchips Flashpaq tuner in for like about 1 week.. Is there anyone else who is running this programmer who thinks there speedo is off? I have 33 inch tires, ran the install and put the tires in programmer, but it just dont feel like i am going speed limit or suggested MPH.

 

[8100 Power]

I have had the superchips Flashpaq tuner in for like about 1 week.. Is there anyone else who is running this programmer who thinks there speedo is off? I have 33 inch tires, ran the install and put the tires in programmer, but it just dont feel like i am going speed limit or suggested MPH.

I've found that most programmers settings are not the truck tire size you put it. Grab a GPS, and adjust accordingly with your programmer.