my car was tuned on 93 octane @ an elevation of 700. we set the timing at 29 degrees with no KR. i now live in a city that only offers 91 octane but am at 3700 feet above see level. i don't know anyone that has auto tap so i cann't check if i am getting any KR but the car seems ok so far on 91. do you think i will have any problems?

 

See level??!! Buy a Predator it's cheap and you can watch your timing and KR and make your own adjustments.

 

yep what he said