Quote:
Originally Posted by phattyduck
The 5VZ ECU ignores the knock sensor below 3k RPM, so it will always use the 'default' timing in that area of operation. Since it is tuned for 87 octane, any 'extra' octane will decrease instead of increase performance. 91/93 is needed for the supercharged guys for this exact reason (can't pull timing with knock below 3k rpm - extra cylinder pressure = ping in those situations).
If you still get sufficient performance with E15 and fuel trims are still reasonably good, it might be better for the pocketbook, if not for performance.
-Charlie
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So ultimately if I'm not experiencing any adverse effects then I should be good to go to run it full time? So far I haven't noticed any pinging or anything out of the ordinary (knock on wood)
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