Originally Posted by WhiteBgeye02
catback wont matter. make sure its 93 octane and stay off the throttle. like mentioned above if your worried get some race gas and throw two gallons in per tank to boost the rating up to like 95 octane. i ran my stock map right away and it never knocked under normal driving conditions. but then all gas quality is different. i also had the 850 injectors in right away and the scaling was a bit rich.
I have 2.5" catback, tmic, used the OEM boost control, with CAM 2 100 octane (full tank, $9.5/gal), it did not knock.
I did not do pulls with it, drove normal and kept logging it.
I ran through 3-4 tanks, logged, there was no knock.
Took it once to top boost, to see if it really reaches stock over 18 PSI, it did 18.7 PSI, did not knock.
If you use CAM2 100 (make sure UNLEADED), log and drive without making pulls, you can log and get the answer from the ECU, whether you're OK or not.