4.698GT

Can I run them on the stock tune till i can get a tune and do they require premium gas?

cammed99gt

I ran on heads and cams on the stock tune for almost 8 months.U will be fine until u can get it tuned

4.698GT

how about the octane question?

cammed99gt

U shouldnt have to run the highest grade(87,89,91) and u could put the lowest and still proberly be alright.Just mix it time to time.Sometime put the lowest and then the other times put one of the other grades in it.U will be fine if u dont put the highest grade in it.

cammed99gt

When u get it tuned then your going to have to decide what octane u what.The more timming u run the higher the octane u will have to use

4.698GT

Yea, I was thinking about that, probably something like a 3 different tune chip. One economy(89,87 if possible) and then preminum tunes

cammed99gt

Thats what i got.A chip with 3 tunes with the switch

Jcelli04

i ran 93 in mine but i had to because the tune i had required it. i would run middle grade gas just to be safe. you should def get a tune as soon as possible though. it will really help out a lot