NARLEY PEDALSON
New Member
HEPTANE
Heptane is the zero mark on the octane scale from witch ever other fuel is compared from. Lower octane fuels have more BTU's or energy per gram of fuel ,so the lower the octane the higher energy made when burning in a engine. Mixing heptane in your fuel will lower your octane content and give you more power and with having a vary close oxygen content to gasoline you will not need rejetting/tuning of your carb.
87octane = max compression ratio of 9:1 or a max of 9.66 octane per 1 ratio point, so 9.66 times 6= 58, so the best octane to run in a happy time engine would be 58 octane.
Your mixture for the perfect fuel for your bike would be.
800ml of 87octane gasoline
200ml of heptane
32.5ml of caster or high grade 2 stoke oil