Ford Performance Calibration 2.7L for 37’s speedo calibration?

[Brian_B]

Did you order the spare for the back and did it fit under the break light?

Also - in case you weren't aware. There are brake light extension kits that are made just for tires that are a bit tubby.

Here are just a couple of examples, these are by no means endorsements:
https://hpbuilt.shop/products/hammer-built-bronco-third-brake-light-extension
https://mountains2metal.com/BR6LBLE/

Sponsored

 

[Chritaka]

Curious, anyone that has used the tuner to calibrate to 37" tires, what did it set the circumference to? I manually changed via Forscan to 2775 and it has been pretty spot on up to 80-90 mph.

 

[WowPaul]

Also - in case you weren't aware. There are brake light extension kits that are made just for tires that are a bit tubby.

Here are just a couple of examples, these are by no means endorsements:
https://hpbuilt.shop/products/hammer-built-bronco-third-brake-light-extension
https://mountains2metal.com/BR6LBLE/

Thanks for that.

 

[RickyLakeisaMAN]

I just had the Ford Performance tune installed and they forgot to adjust the tire size. I did it myself. If anyone needs to know, if you're running BF Goodrich KO2 37X12.50R17LT, the revs/mile should be set to 569. If you just plug the tire size into the calculator without specifying the exact tire, it will give you 545 revs/mile.

 

[RickyLakeisaMAN]

An update on this. Even though 569 come straight from BF Goodrich, it is not accurate. After some GPS testing, the revs/mile should be around 585. I GPS tested a long stretch of road and set the cruise to 50 mph. It was spot on 95% of the time, and indicated 49 mph about 5% of the time. The true revs should probably be somewhere between 585 and 590, but I'm close enough. These are new tires. I'm guessing after 50k miles it could change.

Sponsored