You may want to think about using a mix of water methanol for everyday use (without nitrous) so that when you nail it on the on ramp or such you can still keep knock lower then without. When it comes time to use nitrous at the track use 100% methanol to supplement the pump octane being used.
I know some users who are making 80HP with 100% methanol injection and no nitrous, so it can be cheaper in the long run to run more methanol and less nitrous but make the same or more power. As a hypothetical example: Nitrous setup for 35HP shot but with 100% methanol injection actually making 70HP = more bang or longer use out of a 10lb bottle.
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