Quote:
Originally Posted by prlwpod
should make a worthwhile improvement in the way the motor runs (Higher Octane = better combustion ).
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Not really better combustion in this application. Avg gas is 100-110 low lead which is most common by far. Its not really better at combustion or has more energy content one vs the other, it depends on the use IE what motor it is burned in that's the difference.. Gas burns either way. The lead has a higher octane rating which is more resistance to detonation on high compression or boosted engines of which aircraft have. This higher CR or boost give more performance no really the gas persay.
The by product of the lead is it created a layer of lead on the valve seats to cushion the valves and it retains its octane for years IE it doesn't go bad. I have left avg as in a motor unstarted for 2 years and it started right up.
The bad is avg gas is expensive now $5-7 a gal normally some times cheaper. Oh and lead will kill you well over time.
EDIT: Any one ever put some spray or a small turbo on one of these motors? I guess it wouldn't matter on a hydrostat as it only spins x speed to get X pressure?