Nvm I did the change through forscan to try it out and with the new values from the spreadsheet calc I found on f150forum it was dead on with waze gps. So if anyone ever needs help lemme know I can link the stuff needed
You sure about this?Has anyone tried to calibrate their speedometer for bigger tires? The hypertech unit does not work on the diesels so it makes me wonder if the forscan change method will work on our trucks?
Yokev,Hypertech makes a unit for the F150 diesel, but it's $229! --> Hypertech
Why hassle with this $229 Hypertech device when you can do it yourself in under 10 minutes with a Windows laptop, a $29.99 Amazon Prime shipped device (https://www.amazon.com/gp/product/B01F0GVBWY/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1), and FORScan software? Also, then you will be set to do all sorts of additional mods to your truck via FORScan.
that value is a little rich, now the speedo is 1MPH high.@wreedsvt I have used the calculator for you to determine you should change as follows (as a starting point of calibration)...
BdyCM as built
Changed Value = xxxx 0A3B xxxx
See attached screen capture below supporting this...
That hit the nail on the head.
I was initially a little scared about popping my cluster out, but after watching the instruction video it appeared uber easy. Literally took me 10 mins from tools on floor, to the unit in and tools back on floor.@yokev -- report back on how your Hypertech install and configure goes so that others can benefit and learn from your experience--thanks!