As Layton pointed out jet fuel and aviation gas are 2 different things. Jet fuel being basically kerosene. You would NOT want to use jet fuel for certain. Av gas I believe can be a suitable substitute. You may however want to look into specially made race gas. Brands like VP are very good IMO. I currently use a 50/50 mix of VP C-12 and 93 octane Mobil. The bike has much better throttle response and the jetting was much easier to get down. I did have to jet leaner both the slow jet and main YMMV.
Good luck and as Layton said, do a search. There are several valuable topics along this line.
Good luck and as Layton said, do a search. There are several valuable topics along this line.
IBWFO
Why do you say it is not good for a bike. You may lose throttle response, but I don't think it will hurt the engine, assuming proper jetting of course. Not any more than regular pump fuel will anyway:). I have used Av gas in the past with no adverse effects to my engine. Did it work as well as the VP? No. But it did not hurt anything.
I would be interested to know why you think it is not good for your bike. Where did you find this info. Keep in mind, lack of performance and destructive are 2 entirely different characteristics.
Why do you say it is not good for a bike. You may lose throttle response, but I don't think it will hurt the engine, assuming proper jetting of course. Not any more than regular pump fuel will anyway:). I have used Av gas in the past with no adverse effects to my engine. Did it work as well as the VP? No. But it did not hurt anything.
I would be interested to know why you think it is not good for your bike. Where did you find this info. Keep in mind, lack of performance and destructive are 2 entirely different characteristics.
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I did a search and found a really good thread explaining the highs and lows of Avgas.
Basically the way I read it the conclusion is right along with mine. It is about as acceptable as using pump gas, but you should try to use a racing fuel or mix.
Here is the thread:
http://www.dirtrider.net/forums3/showthread.php?threadid=5277&highlight=aviation+gas
Basically the way I read it the conclusion is right along with mine. It is about as acceptable as using pump gas, but you should try to use a racing fuel or mix.
Here is the thread:
http://www.dirtrider.net/forums3/showthread.php?threadid=5277&highlight=aviation+gas
Im kind of curious why so many people want something better than pump gas. If you want more power, get a better bike or modify the engine. I understand if your bike requires high octane gas due to compression ratios.. but if you dont need it why would you want to increase the operating cost of your bike? I think running a modern 2 stroke costs enuff as it is.
This is a paragraph that Rich wrote on "GAS"
This all brings us back to the octane question : How much do you need. We'll go into more detail in Part II of the series but here are a few suggestions to get you started:
Start simple and work your way up. Try a good grade of premium gas that doesn't contain ANY ALCOHOL. In most states they will have a sign on the side of the pump warning you about the percentage of alcohol (ethanol or methanol) in the fuel. Most well modified normally aspirated engines can run on 95 -100 octane gasoline. Good porting with flow matched transfer ports can significantly lower octane requirement on two cycle engines. If your engine detonates try one (or all) of the measures to lower the octane requirement of the engine. If all these measures fail, try mixing pump gas 50/50 with a good of good quality race gas (Phillips 66, Power Mist, UNION 76, Sunoco, VP, ELF, etc..) with your gasoline. Make sure you use race gas specifically designed for you your type of application. The fuel manufacturers can make recommendations based on your engines rpm range, bore size, and the type of riding you'll be doing. It's best to stay away from AvGas for your bike. We'll go into the specifics of AvGas in the next installment. Keep in mind that octane requirement is lower at high altitude and high humidity. An engine that ran fine at 10,000 feet could very easily detonate at sea-level, or a sudden drop in humidity on a hot day can cause knocking that never appeared before.
Like I said, I's YOUR bike run what you want.
For some reason I trust Mitch Payton?
Regards
This all brings us back to the octane question : How much do you need. We'll go into more detail in Part II of the series but here are a few suggestions to get you started:
Start simple and work your way up. Try a good grade of premium gas that doesn't contain ANY ALCOHOL. In most states they will have a sign on the side of the pump warning you about the percentage of alcohol (ethanol or methanol) in the fuel. Most well modified normally aspirated engines can run on 95 -100 octane gasoline. Good porting with flow matched transfer ports can significantly lower octane requirement on two cycle engines. If your engine detonates try one (or all) of the measures to lower the octane requirement of the engine. If all these measures fail, try mixing pump gas 50/50 with a good of good quality race gas (Phillips 66, Power Mist, UNION 76, Sunoco, VP, ELF, etc..) with your gasoline. Make sure you use race gas specifically designed for you your type of application. The fuel manufacturers can make recommendations based on your engines rpm range, bore size, and the type of riding you'll be doing. It's best to stay away from AvGas for your bike. We'll go into the specifics of AvGas in the next installment. Keep in mind that octane requirement is lower at high altitude and high humidity. An engine that ran fine at 10,000 feet could very easily detonate at sea-level, or a sudden drop in humidity on a hot day can cause knocking that never appeared before.
Like I said, I's YOUR bike run what you want.
For some reason I trust Mitch Payton?
Regards
IBFWO:
So you are saying that mitch payton stated that Avgas will damage your engine more than pump if it is correctly jetted? I would like to know in detail why. Not just say because it's so. I am not saying you are wrong, but I do want facts and quotes not speculation or hearsay.
As I stated in my first post a specially formulated race fuel is the suggested way to go. However just because Avgas may not perform as well as a "race fuel" does not necessarily mean it will damage your engine, which you have implied.
Just because something is not recommended over something does not mean it will "be bad for your bike". This is what I want to clear up.
And no where did I see in any of Rich's posts did he say Avgas run correctly will damage your engine. He mentions pore throttle response, etc... but not damage. Even suggests mixing race fuel and Avgas as an alternative.
So you are saying that mitch payton stated that Avgas will damage your engine more than pump if it is correctly jetted? I would like to know in detail why. Not just say because it's so. I am not saying you are wrong, but I do want facts and quotes not speculation or hearsay.
As I stated in my first post a specially formulated race fuel is the suggested way to go. However just because Avgas may not perform as well as a "race fuel" does not necessarily mean it will damage your engine, which you have implied.
Just because something is not recommended over something does not mean it will "be bad for your bike". This is what I want to clear up.
And no where did I see in any of Rich's posts did he say Avgas run correctly will damage your engine. He mentions pore throttle response, etc... but not damage. Even suggests mixing race fuel and Avgas as an alternative.
