I wouldn't think or take concern to it about a higher rpm engine. It's a fuel that's ignited by spark. I had an apex with the head shim, When I first got it I had run av gas through it with pump gas mixed in, then I ran out of av and just ran the pump gas, I can get 94 so it worked fine, Ran it at 18# some days and never seen a det code or had an issue.
PART 3: AV gas in a turbo 2 stroke
- Thread starter TRS
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I wouldn't think or take concern to it about a higher rpm engine. It's a fuel that's ignited by spark. I had an apex with the head shim, When I first got it I had run av gas through it with pump gas mixed in, then I ran out of av and just ran the pump gas, I can get 94 so it worked fine, Ran it at 18# some days and never seen a det code or had an issue.
F
Ran suncor many years ago and ran well, but costly and hard to get, switched to av gas and get it at local airport, very predictable, just got told to increase burn rate of av to make it close to race gas by turning up timing one degree, just giving it a try for first time this weekend, hoping to see a difference on lower rpm, can tell a difference at idle how it’s sounding
J
One thing I don't see mentioned here is the supposed "leaner burn" of 100LL. This being due to the fuel being less energy dense. Anyone care to comment. I know way too many people (myself included) with a ton of success with the fuel, so I'm not sure how much to note this...but the facts suggest it would be a bit less energy dense...
O
Here's my experience, bighorns, 16 axys assault, silber turbo 5lb spring, started with 4 gallons of e50, yes e50, filled with 91 ran great on boost, next day pit in another gallon of e50 and 5 gallons 91, much better off boost throttle response no codes ever and probably could have just ran 91. So back in Iowa, 3 lb spring, 50/50 e50 and 91 runs like a scalded dog, and I'm thinking just a couple gallons of e50 would be sufficient. Just my experience, run e 85 in a procharged Vette so I know how boost likes corn fuel. I'm sure at higher boost I'd run out of injector here in Iowa but at 3lbs it's fast and quick enough lol
The energy density is negligible, in my opinion. From what I gather, 100LL has 112,500 BTUs per gallon, while 91 pump gas has ~115,000 BTUs, slightly less if the blend has 10% ethanol. Theoretically the 100LL should have a slightly richer stoichiometric air:fuel ratio, but with the increased octane, detonation should not be a problem. If the fuel works well, stick with it.
I would be careful with the E50...the stoichiometric air:fuel ratio is considerably more rich than pump gas. The electronics may be able to compensate, but I'm not sure. Better off with 100LL or VP 110 at a lower mixture.
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