Unlshd
Member
I use 91 Octane and when the temps go to tripple digits; I head to the speed shop for Sonoco 110 Leaded Race Fuel to mix with 91 octane pump. A 50/50 mix gets 97 octane not an average like you would think. The reason I go up when temps go up is to avoid detonation on rear piston from low speed stop/go city traffic allowing it to get heat soaked due to low airflow.
Delear (also an owner) recomended turning bike off if at red lights. I asked him about adding race fuel instead and he agreed that might be better than all the start loads to starter and battery.
As for av-gas; it is not oxygenated it is designed for supercharged aircraft. It has same blend stocks as leaded race fuel. Both are a blend of of Light Alkylate, High Severity Reformate, Toluene and Tetra Ethyl Lead. I used to blend gasoline at the ConocoPhillips refinery here in Billings, MT and during summer fire seasons I was blending 100ll av-gas at a rate of 36,000 bbls a week or 1,512,000 gallons. The last I heared modern prop driven aircraft are using unleaded gasoline or; if it's a turbo prop, jet fuel (basicly kerosene unless it's JP4 military spec.). 100 ll will eventually be phased out similar to leaded fuel was for cars. Target year was for that 2020.
The difference between 100 LL Aviation and 110 Race is how they acheive the higher octane. Refineries use; more toluene and less lead/reformate in 100LL Aviation (compaired to 110 leaded Sunoco). Toluene has a less lubricating capabilities and slower burn rate making it respond slower to sudden throttle variances. Aircraft throttle up and once at elvation maintain constant throttle applications with not alot of load.
Jim
Delear (also an owner) recomended turning bike off if at red lights. I asked him about adding race fuel instead and he agreed that might be better than all the start loads to starter and battery.
As for av-gas; it is not oxygenated it is designed for supercharged aircraft. It has same blend stocks as leaded race fuel. Both are a blend of of Light Alkylate, High Severity Reformate, Toluene and Tetra Ethyl Lead. I used to blend gasoline at the ConocoPhillips refinery here in Billings, MT and during summer fire seasons I was blending 100ll av-gas at a rate of 36,000 bbls a week or 1,512,000 gallons. The last I heared modern prop driven aircraft are using unleaded gasoline or; if it's a turbo prop, jet fuel (basicly kerosene unless it's JP4 military spec.). 100 ll will eventually be phased out similar to leaded fuel was for cars. Target year was for that 2020.
The difference between 100 LL Aviation and 110 Race is how they acheive the higher octane. Refineries use; more toluene and less lead/reformate in 100LL Aviation (compaired to 110 leaded Sunoco). Toluene has a less lubricating capabilities and slower burn rate making it respond slower to sudden throttle variances. Aircraft throttle up and once at elvation maintain constant throttle applications with not alot of load.
Jim
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