coule tune questions for SCT

[Cravinmohead22]

Just got a tune and I need to change the wheel size to 18. Anyone know which setting it will be. Cant remember what the option are exactly but it was revs per sec or something like that.

The other thing is timing. I was told its set at 22.5 degrees. Any thoughts on that level?

 

[Justin@VMP]

You can't just set timing, there are too many variables and modifiers, but you can shoot for that value in static conditions.

Wheel size does not matter, just outside tire diameter. The PCM sees this as revs per mile which is usually published by the tire manufacturer.