Trying to use the tuner to calibrate my speedo for the larger tires. Is there a chart for the tire size that you can go by to change the tire size section in the tuner? It only gives you rpm choices, not tire sizes.

 

i'm not sure but maybe you should contact mike from 5 Star Tuning | Custom Dynomemeter Chassis Tuning Products and Services he sells them and i'm sure he can help you.

 

Well I was told by SCT that changing the tire size to correct speedo, with an SCT is NA.

 

glad to see you answered your own question.

 

Only two ways that I've known to be able to change the speedo to account for tire size. One is to go the dealership and get it done, but they can only do it up to 37", or you can use AutoEnginuity to do it and with that software you can go up to 40".

I've seen the option for it in the software, but I don't mess with tires and tire sizes(not my thing), so I don't have much experience with the programming aspect of it, I just know the option is there.

 

Well, the SCTX3 has the option shown to change tire size, as well as a few other options, and none of those actually are functional. Not sure why they are in there if you can't use them.

 

If I remember correctly, the X3 actually programs a few Ford vehicles, not just our trucks, so while the option might not be able to be used by the truck owners, it still might be able to be used for the other Ford vehicles that it does tune. That's the only reason I can think of for that option to still be on there and not viable for us. Unless they plan to have that option up and running and just have the base software already activited for it.

 

My edge could do the tire size but here is another option

TruSpeed™ Speed Sensor Recalibrator · Superlift · www.superlift.com