Ok I have a 2008 F150 with a 5.4 engine and automatic. I have a few questions.
Only mods are shorty headers, Cat back Edelbrock exhaust and a K&N Air Filter. I plan to run 87 octane but not opposed to 89 if it makes a difference here. I want alot firmer shifts. I tow a camper and I used the 87 tune ...