When using methanol in karting before it was banned, I used it with bigger compression ( up to 18 from 15.5 ) and the exact same ignition and pipe designs.
We used to run AvGas at around 1280*F and this was the egt for best power.
When changing to Methanol I found that the best power with that com was had at around 1000*F, but that with the same pipe it would rev even harder.
This was due to the carbs natural tendency to richen up, over the top of the power band and is why solenoid powerjets work so well when using petrol.
Unlike petrol that drops off the power rapidly when going richer than about 10% under stochiometric ,this makes no difference to methanol power at all.
In fact going over 20% rich you can make more power with even more com and kill any tendency to deto by simply drowning the combustion in unburt fuel.
But this drops the egt too much, and you then need to shorten the pipe.
That setup had less mid, more peak, but less overev, and was simply not as fast on track as the lower com version.
I found that the stock pipe length made more mid and the high com gave better peak, then the fuels natural A/F characteristics giving better overev.
Using this setup we could get mid 70RWHp from a 250MX engine that made mid 60s on Avgas, about a 15% increase.
The way to stop seal issues ( and stop moisture in the methanol from rusting all the steel wear surfaces ) was to flush thru the engine on petrol/oil for a few spluttering minutes after every race meeting.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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