3sge (3rd gen) Octane? Options

[czwalga]

3rd gen 3sge does anyone know the recommended octane? Or most likely RON since it's not a US engine? I've been bashing my brains in trying to figure out this problem and refuse to go to another race with it. After about 30 hard miles 5k RPM.... the engine starts cutting out lower and lower in the RPM range until I cant rev over 4k RPMS.

I've been running 87 octane, i'm thinking the knock sensor could be detecting something and slowly pulling timing.




If this is the case i'm an idiot, and created a lot of headache for a stupid easy fix.... just sucks cause there's no easy way to test it.

This post has been edited by czwalga: Jan 31, 2013 - 8:10 AM

[czwalga]

Well... i was able to go out on the highway for about 40 minutes and get the engine to start sputtering so at least i can test it. Just takes a while.


After it started doing it I dumped a crapload of 108 octane booster in. Still started sputtering but the ECU might need some time to relearn itself. I'll go back out this weekend and try again.


If this doesn't fix it... i'll be switching to an aftermarket fuel pressure regulator and actually get a gauge.