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Toluene is expensive and a PIA to use all the time. But a trial tank can be used to determine the effects of a mild improvement of octane.
Is the K&N getting cold air?
It would be better and cheaper to get a richer AF mixture if you are now getting a bit on the lean side. So AF readings would be good to have. RRFPR?
posted by 65.68.10...
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