AV Gas

[liferider]

AV gas is 100 octaine with no ethanol in it. I have been running it now for over a year in my BD and about 6 months in my HD Ultra with a EVO engine with a stage 3 pushing 10-1 compression. My dyno showed in Nov I was hitting 87 HP on the HD. Has anyone ever had problems with there BIKE running AV gas. I know it is NOT suppose to be run in car's and trucks and will 100% guarantee engine trouble be it the pistons, Cataletic converter, Ect ect.............. But in a bike with 10-1 compression, what harm could it do? My mechanic who is a ex-flat track racer says absolutely non. If anything running shit ethanol regular unleaded is the worst thing to put in a 107 SS motor. What's ya'lls thoughts?

 

[FatDog]

I've run AV gas in snowmobiles and the snowblower and have never had any issues. Have yet to try it in the dog or the hog.

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[IRONHEAD]

I just bought 5 gallons to put in my K9. The shop I take my bike to suggested it when I let the gas go bad over the winter. "It will help clean it out" he said. Also he suggested putting some in before putting up for the winter and it wont go bad like the shitty gas we use now. 110 octane at 7.50 a gallon. You wouldn't want to run it all the time. It would break the bank!

 

[bearman]

The ONLY things aviation gas will hurt are catelitic converters and oxygen sensors and that's if its leaded av gas. If you have a carburator and no cats on the bike you will never screw anything up. All aviation gas does is keep your engine from pre-ignition(detonating or pinging) better than regular gas. Of itself it doesn't change anything. What it does do is let you advance the ignition timeing more before detonation. That is where the so-called extra power comes from. If your engine was pinging or detonating before, then it will run better with it, but if your engine was running fine before you started using av gas, you should not notice any difference.
That being said, the engines that are most suseptable to detonation are large bore, air-cooled motors, so high octane is a good thing in a big dog, just not sure if you really need anything more than 91 or 93 octane.
Just my 2 cents.

 

[texvet16]

If Im not mistaken it will make the engine run a little cooler as well. I use to mix it 2 to 1 with pump gas in my 2 stroke dirt bikes and never had a problem.

 

[liferider]

When I go to Sturgis I bring 6 -5 gallon fuel cans with AV gas 100 Octaine. I fill up the bikes then we reset our odometers. We judge through out the day when we are roughly 1/2 way done riding or about 125 miles till we get back to the house and top off with 93 octane fuel and put Star Brite ethanol additive and a packet of Rocket fuel Octane boost. This gets us back to the Rally Rental House and we fuel up again with AV gas and head out the next day. I have picked up some heavily laden ethanol fuel and my dog coughed and farted for 30-70 miles till I was able to get proper fuel in it. I don't trust some of the fuel stops so like I said. We each bring our own supply. I have a 4 bike trailer, loaded with 3 bikes and 12-5 gal containers where the 4th bike should go. The smell is so sweet. My buddy who rides with me jokes about someone smoking to close to the trailer and blowing everything up. I do however open the roof vent about 1/2 way to get the vapors out while we are driving down the road. The other thing I have noticed is, on my BD Chopper I run Martin Brother Madusa pipes and where the M is, when I was running 86 Octane and no fuel treatment the M was black with carbon. Now running AV gas the M is white. Same thing on my Ultra Classic. The last inch of tail pipe on my Thunder Header is white, not black with carbon.

 

[john sachs]

The only thing it hurts is my wallet. Should never have a need for it.
John

 

[Fibersnake]

Beside the issue of most AvGas have lead in it and will mess with lead sensitive components such as the Cat Converter and O2 sensor on like EFI, the other thing is typically is a lower specific gravity and thus lighter gas, so may need to richen up the A/F mixture a little bit.

 

[Viking]

I have ran Avgas in my boat for years. If there is a write up on an aircraft about the fuel system, they will drain every drop of the fuel and never put it back in the aircraft but dump it. Being in the industry I had mechanics feeding my 3 V8's boat for years.... Awesome fuel and it will NOT hurt your BDM...

 

[ringo]

back in the day I ran half & half AV gas in my Z. Then someone suggested to run race fuel, which was alot easier to deal with. No more 5 gal cans or trips all the way out to the airport. Ask your local racers, they'll tell you where to go.

 

[STROKER]

I've been running a gas for several yrs. Not one problem with it. Has nearly unlimited "shelf life" after 3 or 4 thousand miles it does seem to lead up the plugs some, so I usually bead blast them,and carry an extra set with me. Also it helps working at the airport, and I usually get stuck with doing the sumps, so I have access to all the AV gas I need.

 

[Motorcycle Parts Man]

I went to a Aviation fuel specialist school, the thing about avgas is that it is blended for use in constant speed aircraft where there is not much idling, jus preety much balls to the wall , so there are no blended cheimicals for all the up and down changes with throttle in a motorcycle in avgas, eventually you will burn your valves out of the bike , its ok to run 93 in the bike mixed with a little avgas but dont run straight the bike will go like a raped ape until the valves start to burn up .

 

[john sachs]

I went to a Aviation fuel specialist school, the thing about avgas is that it is blended for use in constant speed aircraft where there is not much idling, jus preety much balls to the wall , so there are no blended cheimicals for all the up and down changes with throttle in a motorcycle in avgas, eventually you will burn your valves out of the bike , its ok to run 93 in the bike mixed with a little avgas but dont run straight the bike will go like a raped ape until the valves start to burn up .

I'll guarantee if your bike is tuned properly, and your compression is within reason, you WILL NOT pick up a half of a horsepower. In fact you may lose power. :bang:
Also if using leaded gas you're into a big buck overhaul on your heads prematurely. :angry:
John

 

[Viking]

I have ran Avgas in my boat for years. If there is a write up on an aircraft about the fuel system, they will drain every drop of the fuel and never put it back in the aircraft but dump it. Being in the industry I had mechanics feeding my 3 V8's boat for years.... Awesome fuel and it will NOT hurt your BDM...

I've been running a gas for several yrs. Not one problem with it. Has nearly unlimited "shelf life" after 3 or 4 thousand miles it does seem to lead up the plugs some, so I usually bead blast them,and carry an extra set with me. Also it helps working at the airport, and I usually get stuck with doing the sumps, so I have access to all the AV gas I need.

I went to a Aviation fuel specialist school, the thing about avgas is that it is blended for use in constant speed aircraft where there is not much idling, jus preety much balls to the wall , so there are no blended cheimicals for all the up and down changes with throttle in a motorcycle in avgas, eventually you will burn your valves out of the bike , its ok to run 93 in the bike mixed with a little avgas but dont run straight the bike will go like a raped ape until the valves start to burn up .

Experience VS. Theory at its best.....

 

[hsmunoz]

I ran LL100 AV gas for many years in 2 stroke race ski's. The reason was that the lead lubricated a bit and the high compression motors would not detonate. I don't recall performance "increase" by using it. I used it to keep "performance modified" boats from blowing up. and it was alot less expensive than VP103 at the time.
plus as someone mentioned the shelf life was like indefinite.

 

[liferider]

I ran LL100 AV gas for many years in 2 stroke race ski's. The reason was that the lead lubricated a bit and the high compression motors would not detonate. I don't recall performance "increase" by using it. I used it to keep "performance modified" boats from blowing up. and it was alot less expensive than VP103 at the time.
plus as someone mentioned the shelf life was like indefinite.

That's correct, the shelf life is much longer, there is no Ethanol to gum up the carb. It's the ideal fuel to fill your tank with to make your last ride of the year before winter hits and you storage your bike like many people up noth do. I just like it for the fact #1 NO ethanol to gum up the carb, #2 high octaine 100%, motor doesn't pop or ping with it. #3 Long shelf life. Lets also look at one other factor. How many of us buy 90-93 octaine and add octaine boost. I do when I am out on the road plus I add Star brite Ethanol enzime treatment to my fuel. But what exactly is my Octaine level once I have done this? I use Rocket Fuel Octaine boost.