When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Happy Monday! Hope everyone had a good weekend. I would like to speak with a FORSCAN engineer/developer regarding 23+ Super Duty. Looking to increase the tire diameter parameters to 3280 mm and 3430 mm so the trucks don't throw drive assist alarms. At min, increase to 3280 mm, but would be nice to also have the 3430mm option. Right now the max increase is 2780mm. Truck in picture is equipped with a hypertech tuner. PFA
ForScan can only change what is programmed in from Ford code.
Currently Ford code only allows 2770
Beat bet is aftermarket at this point in time.
ZooDad
I’m not a Forscan user (yet….) but I think I recall some conversations in the EX forum regarding taller tires than the PCM could accept, with the Sterling 10.5” rear axle with the ring gear tone ring some folks had success altering the number of “teeth” on the tone ring within Forscan to trick the PCM into thinking less revs to offset the bigger tires. Requires some math of course to get to the desired target. Not sure how the modern trucks are setup for a VSS (tone ring still?) and if this work around would be possible. I can try to find the thread(s) in the big wagon section to hopefully explain it better.
I’m not a Forscan user (yet….) but I think I recall some conversations in the EX forum regarding taller tires than the PCM could accept, with the Sterling 10.5” rear axle with the ring gear tone ring some folks had success altering the number of “teeth” on the tone ring within Forscan to trick the PCM into thinking less revs to offset the bigger tires. Requires some math of course to get to the desired target. Not sure how the modern trucks are setup for a VSS (tone ring still?) and if this work around would be possible. I can try to find the thread(s) in the big wagon section to hopefully explain it better.
That procedure used to work. No longer with newer trucks.
As ZooDad mentions there are aftermarket calibrators from Hypertech and others. Sounds like it may be the only option if it's outside of FORScan's parameters.
But it may be an expensive solution for a one off use.
