Ok so i installed the performance tune that came with my diablo U7146 . When I read the instructions it said since I'm in California and we only have 91 octane and not 93 octane to do a 10% retard so I did. Reading in these forums i says to only do 2% retard for 91 octant so did I do it right or is the instruction booklet wrong? Also my car was 80% filled with 87 octane gas when I did the tune so i have to wait till I use up the gas before i can fill it up with 91, will this hurt the engine?
Any help will be apprecited.
I didn't find the right solution from the Internet.