High octane at the track???

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07-05-2007, 07:29 PM

#21

Formula413

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Quote:

Originally Posted by six_string_wiz

Believe it or not I understand what youre saying.
TUNING.Its all in the tuning,spark and compression.
Without adjusting for Higher grade fuels,a mostly stock engine will not have the tuning required,to make proper use of the energy content held within a specific grade?

Correct?

I don't know if there is any amount of tuning that would allow a stock LS1 to take advantage of very high octane fuel. To some extent, the engine tunes itself; the PCM will advance the timing until it detects knock, then keep it just below the threshold where knock occurs. I don't know if it could actually get more advance with higher octane unless the engine had been modified in some way that increased compression (different heads for example). How the PCM controls advance and retard is something I don't know that much about, I'd like to find a good source of info on how this process works.

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