nathin

I need help. I've searched and searched, yet I am running around in circles. I have a 2011 Lariat with a 5.0. I'm about to upgrade to some Toyo M/T 35x12.5's on the factory 20's. What i need help with is the speedometer calibration. A lot of guys have said to get an Edge tuner and that it'd work. I emailed them and the rep said none of their products have the ability to change tire size. I am awaiting responses from Hypertech and SCT and hopefully one of the two have something that'll work..

What I need is: guys with 2011 5.0's that have changed their tire size, how in the world did you calibrate the speedometer?? All help/suggestions are appreciated! Thanks!

midmo

I had the a bigger size tire put on my 2011 xlt with a 5.0. I just told them I wanted the speedometer calibrated to the tire size and they did it no problem. I have checked my speedometer with my garmin and it is dead on. I think it was $30 or $40 to have it done where I live.

nathin

What size of tire did you go with? And who did it, the dealer?

I know the raptor has like a 34.4 inch tire, which the dealer SHOULD be able to program into the truck's computer. I would think it'd be close enough to the 35's. But I'm not 100% sure. I would hope so, so I don't have to buy a programmer!

Thanks!

EO2143

A dealer in Tennessee told me that they cannot set a regular F150 with the Raptor size due to the fact the raptor has a different computer. They said they would only be able to set it to what came from factory with regular F150 options.... in other words no where near close to 35's. I had the same problem with the 2004-08 trucks. I ended up buying a hypertech re-calibrator.

KOTOC79

SCT tuner...

gDMJoe

As for the FoMoCo dealership service department changing the speedometer calibration ... Using FoMoCo's IDS (Integrated Diagnostic System) tool they can flash the tire size parameter (RPM - Revolutions Per Mile) to any of the stock OEM values (including the value for the Raptor [its PCM may be (?) different, however, the table parameters are not]).SCT also has the ability to adjust the tire size calibration.
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rosko082391

I used Hypertech's speedo calibrator on my 2011 when I put 295/70/18 tires on and it worked great. the reason I went that route because it was cheap and im not ready for an actual tuner just yet