so has anyone ever adjusted the vss calibration to fix when you have wrong sized tires. reason i say this, i am running 275-35-18, stock is 245-40-17, on the tire calculator, when i should be doing 65, i am aactually doing 67.27. i beleive i am 3.4% off on the speedo, so i am going faster then my speedo says. this is not a huge deal, as it is only a small amount, but if i can fix it, why not.

i think i mess with the options vss-vss calibration number, but will that fix the dash speedo also?

basically, has anyone messed with this?

 

Don't think it will affect the speedo. IIRC it's a direct connection.

 

bummer. will it at least read right in my aem serial gauge if i adjust that calibration?