racing fuel

[jack-the-ripper]

Would the higher octane (103+) of racing fuel give a little more umph to a chainsaw? I was told that this fuel actually burns cooler too.
Also, does anyone have the name, ph. no., or web address of the place in Wisconsin that bores the Husky 372 and replaces it with the 385 piston?

 

[066 stihl]

U.S. Chrome

866-922-5066

 

[bwalker]

of racing fuel give a little more umph to a chainsaw? I was told that this fuel actually burns cooler too.

Unless you have altered you motor it will not and for the uumpteenth race fuel does not burn cooler.

 

[jack-the-ripper]

thanks

 

[justlearnin]

I don't know about burn cooler. But I use aviation fuel mixed 40:1 with sta-mix oil. And it works great. The shelf life is alot longer. I run it in my weedeater and lawnmower too. Let lawn mower sit out in shed all winter. Hit the primer and pull the cord one time and it's ready to go.

 

[Ruger14]

hey justlearnin. welcome! i was wondering where you baught aviation fuel and whats the cost compared to unleaded. im from evansville so im not to terribly far from you. not many people on here from indiana. enjoy, thanks much.

b

 

[travelr64]

High octane fuel does not run better in a low compression engine . . . . ditto for avgas. I spent several years fueling airplanes for uncle sam, and spent several months in school studying gas and jet fuel.

Octane is not a substance they put in fuel, it's a rating that measures resistance to detonation. The higher the rating, the more heat it takes to ignite. Hence avgas and high octane gas burn hotter. The difference between auto gas and avgas is the rating, that's all. Once the number goes over 100, it's no longer an octane rating, it's a performance rating. It means the same thing.

As far as leaving it in the mower over the winter and firing right up, I do that with regular pump gas all the time. I have an old Ford bus that sat for eight years with pump gas in it, and it also fired right up when I charged the battery and turned the key.

For the most part, unless you're running over 10:1 compression and/or a lot of spark advance, you're wasting your money on high octane fuel.

Coop

 

[Bill G]

Originally posted by travelr64
The higher the rating, the more heat it takes to ignite. Hence avgas and high octane gas burn hotter. Coop

So what is the ocatane rating of alcohol ? Why does it burn cooler?

Bill

 

[travelr64]

Bill

I dunno much about alky, or if it even has an octane rating . . .we didn't use any in the military planes. Actually though, the gasohol they sell here does have a lower octane rating than the straight gas, so I'd guess alky burns cooler and ignites easier than gasoline. Most of the ethanol I see has an octane rating of 87 as compared to 90 for the straight gas they sell in these parts.

To be honest, I don't know a lot about chainsaw motors, but I suspect most have a compression ratio between 9:1 and 10:1, hence the instructions to use premium gas.

Coop

 

[Bill G]

"Gasohol" is a term from the 1970's. It has been years since I have heard that one. I was not referring to 10% Ethanol based fuels that are available at local gas stations. I was talking about alcohol based "racing" fuels. Idf you have ever been around it you would know it. The burning eyes and choking gives it away.

Bill

 

[justlearnin]

The last av fuel I got was from the Paoli airport at 2.10 a gallon. But that was about three months ago. I'm not an everyday chainsaw user but I know several and it's all they use.

 

[sedanman]

The last time I was around an alcohol burning car the exhaust was actually almost pleasant, sweet smelling. It's the nitro burners that attack mucus membranes and cause the burning eyes/choking. It's kind of funny to be in pits when they're warming up a fuel car. They start the car on alcohol and the sound draws a crowd, when they switch over to nitro the crowd starts dropping like flies.

 

[Crofter]

Misinformation

If you seriously want info on octane ratings, performance, ignitability, BTU content and other burning characteristics etc., do a google search and chase down the information leads: even some of the articles there have misinformation in them.

Frank

 

[bwalker]

The higher the rating, the more heat it takes to ignite. Hence avgas and high octane gas burn hotter. The difference between auto gas and avgas is the rating, that's all. Once the number goes over 100, it's no longer an octane rating, it's a performance rating. It means the same thing.

None of this is true.
Octane is a measure of gasoline resistance to detonation. It does not burn hotter as all gasoline has a btu rating that is very close to one another. There is a huge differance between avgas and auto gas. Av gas is made from a high alkalate refinery stream where auto gas is made from what ever crap they can make it out of. The rating sytem for av gas is also way different than the r+m/2 method used for auto gas.

 

[ehp]

There is 3 ways that they use to measure fuel, alcohol has a rating of 130

 

[mryb]

By Sedanman
The last time I was around an alcohol burning car the exhaust was actually almost pleasant, sweet smelling.


In Summit Racing catalog, they have some stuff that you dump in your fuel and it makes it smell good. they have banana, bubble gum and strawberry to name a few...Rick/Saw Slut

 

[Crofter]

I knew Ben was going to jump on that one and rightly so. There are so many myths about Octane and various fuel blends. A lot of what would seem LOGICAL is not. Check out any information well before you swallow it. Be especially suspicious if someone else is regurgitating it!

Frank

 

[Gypo Logger]

Hi Saw Slut, thanks for the sample bottle of cologne additive for my fuel. I chose the SPF- Spruce Pine Fir because it reminds me of New Brunswick.
John

 

[ehp]

you got that right gypo , he was kind of easy with that stuff now was it he, the alcohol /nitro mix didnot bother your eyes now did it in the shed after a couple of runs with the 6400