will my SCT xcal 2 let me change the speedo for a 28 inch tall tire in the back, im afraid with having the rear 2 inches taller than the front tires it will mess with my ABS. if it will does anyone have instructions on how to do so.

 

I think it does, look in your instruction book.

 

You can do it with mine from the user menu. You will more than likely lose your ABS with that much difference in tire height.

 

As long as you have the end user rights, you should be able to change the tire size on your XCal2. You will need to reflash your car with the tune you want. It will ask you if you want to change optional parameters, select yes then scroll down thru the options and there will be one for tire revolutions/mile. You will need to know this number. Most popular tire brands list this #. If you can't find it, go to www.tirerack.com and select a tire the same size as yours, and it shows the rev/mile on their site.

 

alrite cool thanks fellas, im not worried about losing abs operation i just dont want it activating every time i hit the brake because the sensors would see the front moving faster than the front.

 

it won't act up on you, it just just turn off.