Anyone running AvGas in their Harley? Was thinking about it today as I filled up and I was on my way to the airport. High Octane? Why not run 100LL AvGas in the Harley. Can't hurt it, can it? I used to run it in my 65' Impala Super Sport.

 

no advantage to it- it's not gonna run any faster or any cooler.

Mike

 

used to do it all the time in my metric back in the 80's.. havent tried it in the Harley

 

It will ruin your o2 sensors if you still have them. It says ll but ther is alot in it.

 

Yes it will ruin O2 sensors and cats. A pilot told me that 100LL Av fuel has 3 times as much lead as leaded automobile fuel had.

 

100 LL has lead in it. Not to good for cats. Much better gas than auto gas though. Would eliminate any pinging or detonation.

 

Do you get a "deal" on avgas? In the lower 48 avgas is at least $1.50/gal. more expensive than mogas. Street engines only run at 65% and above power output in short spurts and "coast" most of the time. I suspect that there wouldn't be enough heat for the scavenging agents to keep lead deposits from forming on valves, plugs, and combustion chamber surfaces in addition to destroying the O2 sensors. Even if it were free it would be false economy with the increased maintenance expenses. With unleaded mogas being standard for over 30 years, I doubt that engine oils are formulated any more to hold lead from blow-by in suspension until drained. I also have no idea if lead will accumulate on the injectors and slowly clog them. All kinds on unknowns on this experiment.

 

I use 100LL avgas in my 2-strokes and my 454 powered jet boat. 87 octane is all we can get here, so it is the only option for performance toys.

Avgas is less dense than auto gasoline, it needs 1-2 jet sizes bigger, usually. If you are EFI, you would have to re-map for it. It will kill cats and O2 sensors real fast. If you NEED that high an octane, chances are your motor will never have deposite problems, as you will be running it hard enough to burn them off.

 

A local 76 station has 100 octane Sunoco race gas.

After my buddy built his 124" Street Glide he thought it would be cool to run race gas.

We ran against each other afterward, me with my 96" Street Glide with Woods cams. We were neck and neck. He couldn't pass me.

I told him to switch back to 91 and let's run again. He spanked my bike hard.

Higher octane fuels burn more slowly and evenly. If your bike does not have the compression to support it the higher octane fuel is a waste of time and $$.