aviation gas

[fabbo]

Hi guys
does any one out there in twostroke world know anything as to what avgas does to an engine. Is it safe what is the best ratio of fuel to avgas does it work better with synthetic oil or not. What about its effect on plugs. Any info would be helpful

[riffraff]

100LL Avgas is all I use, been using Avgas forever in all my bikes, never had a issue

[coblefutch]

Avgas is just 100 octane leaded. 2 strokes love the stuff.

[TotalNZ]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

[Blop]

Avgas, ive been using it mixed with normal 98 from pump 50/50, works nice.
Colours youre piston with lead, aah the lubrication 

[2T Institute]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Exactly.Avgas is made to stop planes falling out of the sky, not to make HP. You make more HP with unleaded fuels when you set up for them. avgas and ULP require different set ups which is why I can never understand the 'half pregnant' 50/50 mixes.

[riffraff]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Avgas is formulated to prevent vapor lock at altitude and to provide lubrication for the engine, it works just fine at low altitudes. I ride at 5000 ft, a lot of planes fly below that.

[factoryX]

I been debating about using as well. I'm at 3500ft here in central oregon.

[2T Institute]

If your at a high altitude you will gain more by jetting to those conditions.

[2STROKEREVOLUTION]

Funny topic. A lot of private pilots convert their light aircraft to run on pump fuel because it is much cheaper. Avgas was created because of the inconsistent quality of pump fuel. Now, pump fuel is right up there (if you get the right brands). If it is higher octane, then you can make more power with higher compression. Unless you change your compression ratio to suit it, you won't see any gains. Well, maybe slight gains as lead contains more energy than alcohol.

[TotalNZ]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Avgas is formulated to prevent vapor lock at altitude and to provide lubrication for the engine, it works just fine at low altitudes. I ride at 5000 ft, a lot of planes fly below that.

Yes thats right, and to prevent vapor lock at altitude the volatility of avgas is lower than ideal for performance applications.

[riffraff]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Avgas is formulated to prevent vapor lock at altitude and to provide lubrication for the engine, it works just fine at low altitudes. I ride at 5000 ft, a lot of planes fly below that.

Yes thats right, and to prevent vapor lock at altitude the volatility of avgas is lower than ideal for performance applications.

that's true about any high octane fuel, the higher the octane the slower the burn rate, Not to mention I don't run it for performance, I run it because it's free 

Funny topic. A lot of private pilots convert their light aircraft to run on pump fuel because it is much cheaper. Avgas was created because of the inconsistent quality of pump fuel. Now, pump fuel is right up there (if you get the right brands). If it is higher octane, then you can make more power with higher compression. Unless you change your compression ratio to suit it, you won't see any gains. Well, maybe slight gains as lead contains more energy than alcohol.

Not that many planes can run pump gas, only low compression engines designed for 80/87 octane fuel and none of them can use fuel with ethanol in it.

[TotalNZ]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Avgas is formulated to prevent vapor lock at altitude and to provide lubrication for the engine, it works just fine at low altitudes. I ride at 5000 ft, a lot of planes fly below that.

Yes thats right, and to prevent vapor lock at altitude the volatility of avgas is lower than ideal for performance applications.

that's true about any high octane fuel, the higher the octane the slower the burn rate, Not to mention I don't run it for performance, I run it because it's free 

Funny topic. A lot of private pilots convert their light aircraft to run on pump fuel because it is much cheaper. Avgas was created because of the inconsistent quality of pump fuel. Now, pump fuel is right up there (if you get the right brands). If it is higher octane, then you can make more power with higher compression. Unless you change your compression ratio to suit it, you won't see any gains. Well, maybe slight gains as lead contains more energy than alcohol.

Not that many planes can run pump gas, only low compression engines designed for 80/87 octane fuel and none of them can use fuel with ethanol in it.

Yep free's good, i'd prob run it if it was free too. Do you get 98pulp where you are, i've been using that seems to work pretty well.

[TotalNZ]

Be aware though that avgas is exactly that, formulated for use at altitude.
The high octane rating is all good but apparently it falls short in a few other areas.

Exactly.Avgas is made to stop planes falling out of the sky, not to make HP. You make more HP with unleaded fuels when you set up for them. avgas and ULP require different set ups which is why I can never understand the 'half pregnant' 50/50 mixes.

From my understanding people run the 50/50 mixes to get the higher volatility of pulp and the higher octane of av.
What do you think of BP's 98unleaded? seems to work pretty well for me, just ran a tank through with my reset squish and all the readings are good.

[TMKIWI]

I used to run 98 when I got the bike but when really pushing it , it would pink.
Since changeing to avgas and richening to suit the bike runs great.
I have thought of having the head modified to suit pump gas but with the price difference between the 2 types I havn't bothered.
From what I have read TM changed the shape of the head on later models ( 09 < ?) to run better on pump.