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i thought id ask here maybe for a simple answer rather than call...but i thought sct x3's had an option to where you can change tire size ? if so , where do i change it at? to be honest im not sure how much i went up or down in tire diameter or if changed at all ,i had the stock 17's on before with the stock pirelli's, and i now have 18's with wheel/tires measuring at 26.5 " tall ....the only thing i see on the tuner is tire revs/mph?? is there a chart to convert this or something? am i stupid and dont see it lol?
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2006 torch red mustang gt , 5 speed manual
*motive 3:90 gears
*sct x3 /brenspeed 91 tune
*slp longtubes
*slp x pipe/hi flow cat setup
*steeda cai
*frpp strut bar
*18x9/18x10 saleen black wheels
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"As I walk through the valley of rice, I shall fear no VTEC, for hp & torque art with me and thy rod and thy piston they shall comfort me all the days of my life"
"Before you can be old and wise, first you must be young and stupid!"
There are a few choices to obtain your tire RPM's. Tirerack.com lists most tire specs, you could try the manufacturer's website OR try this: http://www.1010tires.com/tiresizecalculator.asp
You'll probably come up with a few different numbers for the same tire but no worry. The SCT allows you adjust it to the nearest "10" RPM's (i.e, 740, 750, 760). If you have a GPS you can fine tune it from there.
I would first check it with a GPS and make tweaks from there. you will see the options pop up when you start the flashing process. If you don't see them, then your tuner didn't enable them.
thanks to the gordon glasgow link for tire calc , i was able to figure out the revs.....and the funny thing is it actually didnt change at all ! from the stock 17's with 235 /55 /17 to my 255/45/18 front 275/40/18s in the back! i didnt feel like it needed calibaration, but hell 2-3 mph off is 2-3 mph off lol !
__________________
2006 torch red mustang gt , 5 speed manual
*motive 3:90 gears
*sct x3 /brenspeed 91 tune
*slp longtubes
*slp x pipe/hi flow cat setup
*steeda cai
*frpp strut bar
*18x9/18x10 saleen black wheels
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sct question..
