The distillation curve is completely wrong for a two stroke. Given this is it will burn dirty, make less power and contribute to deposits.
I thought SEF (it is unleaded) was the better offering from VP for chainsaws ?
I didn't speak to unleaded fuels, and honestly I don't know anything about SEF.
T4 is well suited to a two stroke.
I figured it will Mike. I think thats all Randy uses
Now I agree with that. I think the high octane is not burning completely and probably the anwser as to why some folks engines stay cleaner?
Really you need to talk about compression ratio when talking about octane requirements.
Its nothing to do with the octane. Octane doesn't effect how a fuel combusts, it's simply a measure of resistance to detonation. The fuel you are using isn't optimal for a two stroke based on its distallation curve alone. VP C12 IIRC is 108 octane and it's very suitable for use in a two stroke.
So these saws arent enough temp and load to vaporize the sunoco 110 with the distillation curve it has? The vp c12 vaporizes more readily?
They don't have enough intake runner/port length or temperature for the fuel to evaporate before it reaches the combustion chamber. Liquid fuel will not combust. If you have alot of liquid fuel making it to the combustion chamber you leach heat and hp out of the engine. In an ideal world premix should nearly all phase change once it reaches the crank case and in the process coating all the internal parts with oil. The resulting vapor them makes it to the combustion chamber where it can be burnt.
Clearly whatever the 110 was caused a HP across the range. However, it's not the octane number that caused it, but rather the distallation curve being wrong for the engine.
For all intents and purposes, you might as well call those HP curves identical.
