FUEL QUESTION?????????
03-19-2004, 10:05 PM
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RE: FUEL QUESTION?????????
I would say that if you have a bunch and want to use it before it spoils. Then go ahead, Be careful of over heating and underpropping. If you have another use for the fuel I would say no. Go get some 10% and 18 to 20% oil fuel. You would save money. The engine really does not need that much nitro. If you are just using it up, I would use it then buy 10% afterwords.
Mark Shuman
Mark Shuman
03-20-2004, 02:24 AM
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RE: FUEL QUESTION?????????
The main difference when using higher nitro is... you burn the fuel faster.
You produce about the same power per ounce of fuel burned... but you burn more per minute. Nitromethane in the amounts we use in the glow engines acts as an accellerant to combustion of the methanol which is the fuel.
There is no NEED for the 20%... but its not an unreasonable abount of nitro to use in any modern glow engine. If the engine is tuned correctly the extra nitro is not going to cause overheating, and won't appreciably decrease engine life.
If you run the engine too lean... yes it can get hotter than it could with less nitro. But the difference in damage done is not going to be something you can easilly compare. Overheating leads to bearing failures, liner plating peel and increased piston wear. How long at what rpm, at what temperature, with how much of which oil will determine how much damage is done. (castor oil is very good at minimizing overheating damage...)
You produce about the same power per ounce of fuel burned... but you burn more per minute. Nitromethane in the amounts we use in the glow engines acts as an accellerant to combustion of the methanol which is the fuel.
There is no NEED for the 20%... but its not an unreasonable abount of nitro to use in any modern glow engine. If the engine is tuned correctly the extra nitro is not going to cause overheating, and won't appreciably decrease engine life.
If you run the engine too lean... yes it can get hotter than it could with less nitro. But the difference in damage done is not going to be something you can easilly compare. Overheating leads to bearing failures, liner plating peel and increased piston wear. How long at what rpm, at what temperature, with how much of which oil will determine how much damage is done. (castor oil is very good at minimizing overheating damage...)
