So ever since I rebuilt my 13bt, i've been putting 93 octane in my car with premix ratio of 1 oz per gallon. But on a post about which octane to use I saw that people were saying to use 87 for a TII. So yesterday I put 87, and my boost is at about 10psi with ported wastegate. And at about 8psi it started knocking!!! The only mods I have is 3in downpipe 3in presilencer into 2.5 greddy catback. 3in intake, ported throttle body. I hope I didnt mess anything up in the engine!?!?! What octane is rtek "tuned" for?

 

Someone just asked this.
https://www.rx7club.com/rtek-forum-168/rtek-1-7-a-763309/


In general, I never run anything less that premium on any boosted application, especially any application running higher than stock boost levels. Rather be safe than sorry.

 

Thanks for the info!!!