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run a 30% xylene mix with your gasoline. Xylene is an octane booster with a much lower vapor pressure than gasoline. You should get a net octane of just under 100 with 93 preimum. You will also see significantly fewer HCs.
In either case I'd lose the double pumper for testing purposes.
Good Luck,
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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