Originally Posted by Maxwell

I know some of you guys are running propylene as an octane booster, I'm curious as to how many extra points your octane is raised on 10% mix?

I'm saving up for the SI ecu tune, and will be dynoing before and after while playing around with different fuels.

I've been told that I can get a 5 point octane rating boost by running on methanol while properly mixed, so I'm curious as to what Hp numbers I will make on 98 octane fuel + meth, before and after the ecu upgrade.

I've also been told that by running Acetone I would see a gain of 2-3 points, it may not have the same resistance to detonation as the Methanol, but it does give you that octane boost and better fuel consumption because it has higher energy density.

Just wondering what you guys have been playing with...