anyone running E-85

[thompy]

so what are the drawbacks to running e85 94 octane fuel in the older hi compression motors, other than water absorbsion, and cooler running motor, all fuel line have new hoses

 

[brdhntr]

Re: anyone running E-85

so what are the drawbacks to running e85 94 octane fuel in the older hi compression motors, other than water absorbsion, and cooler running motor, all fuel line have new hoses

Internal engine gaskets may be degraded by E85. Would not recommend it in these old motors. Unless you are good with a wrench and willing to replace a lot of things.

 

[roscoe]

Re: anyone running E-85

I wouldn't consider these 2 stroke motors to be hi compression.
And higher octane is a waste of time and money with them.
Actually, the more additives in the fuel, usually lead to more problems in 2 stroke water cooled motors.

 

[thompy]

Re: anyone running E-85

i figured 165 lbs was higher comp, the newer motors are running around 110-120 lbs

 

[roscoe]

Re: anyone running E-85

Yeah high comp in a sense. But not in a sense that they require high octane fuel.
But 2 strokes are different, detonation is really not a problem unless you have a hot spot on a piston.

Anyway, these motors are designed to run on 87 octane.

As far as new motors being 110-120, some, some are 100, and some are 140. And years ago, some were 80, or even 70.

All different motors with different designs.

 

[scca vette]

Re: anyone running E-85

I am not sure about a outboard however when it comes to I/O I can tell you that it requires some work. It requires changing ALL the soft (rubber) lines that the fuel runs through that is capable of handeling E85 and will not break down. I have changed fuel injected cars over to run E85 do to the higher octane rating and E85 being cheaper than race fuel. You will burn 20% more E85 than regular gasoline. When going from gas to E85 you will have to Inject (or rejet for carb) to deliver more fuel across the RPM range or it will go lean in a hurry. I am not sure it would really be worth the trouble do to you would be burning through the tank of fuel at a faster than with regular fuel.

I

 

[thompy]

Re: anyone running E-85

with the 20% increase in fuel consumption, some of that can be made up with increased compression, but i guess the seals in the motor are a concern