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BEatonNo1
Nobel Prize Winner
USA
1133 Posts |
 Posted - Aug 04 2003 : 02:11:14 AM
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You could pre mix it or add it in at the fuel line, which would allow you to adjust it as you run the motor
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 04 2003 : 3:41:00 PM
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I have not been following the alchohol part of this discussion, but just introducing alcohol into the gas will not result in more power. Now, if you seriously upped the compression ratio and ran the engine pure alcohol...
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Aug 04 2003 : 5:39:24 PM
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how would i do that?
next stop: nobel prize winner! |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 05 2003 : 11:33:57 AM
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You would either have to fill in the combustion chamber (weld it up?) or install a different piston.
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Aug 05 2003 : 3:11:25 PM
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I always thought injecting alcohol into the fuel line gave a slight performance boost. Wasn't that method used on some WWII prop planes? They had a methyl alcohol injection system of some sort. Advice?
Ah, I just did some quick research. Apparently you MIST/INJECT water/alcohol into the carburator. You mix it with the AIR not the fuel.
Here's an even more interesting idea from: http://www.halfbakery.com/idea/Hydrogen_20Peroxide_20Injection
Peroxide is H2O2 so it has lots of oxygen. This guy recommends mixing it with cheap isopropyl alcohol. I think it would be more along the lines of what you are looking for:
quote:
Hot rodders and the military have both been using water/alcohol injection for decades. Water adds thermal efficiency, and helps cool the intake air, while alcohol raises the octane level, and also helps cool the intake. My suggestion is to use cheap 3% hydrogen peroxide (97% water), and mix it with cheap 91% isopropyl alcohol, and spray it as a fine mist into the intake. As the oxygen came out of the peroxide, it would help burn the alcohol, resulting in higher horsepower. Detonation wouldn't be a problem, because the water and alcohol have a strong anti-detonation effect. The basic idea is cheap performance. You could make your own nozzle easily, and a windshield washer pump would suffice to provide pressure.
DK
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Darknight, Jul 08 2003
You can buy both Isopropyl alcohol and peroxide very cheaply at your local drugstore. Be careful with this stuff though, as apparently it can cause a substantial (i.e. too much) pressure boost!
Edited by - kale on Aug 05 2003 3:24:55 PM |
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Aug 05 2003 : 11:00:44 PM
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arrrrg! too much tinking! so if i atomze the the alcohol in the carb, it will boost the preformance? better go buy some gasket kits.
wait a minute, i just read that again and hell, i already have those parts! thanx!.
but still, will the alcahol work?
next stop: nobel prize winner!
Edited by - cirvin on Aug 05 2003 11:02:50 PM |
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BEatonNo1
Nobel Prize Winner
USA
1133 Posts |
Posted - Aug 05 2003 : 11:33:30 PM
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I think that it would. I think thats what they use on funny cars. I also think thats whats mixed with RC gas motors
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Aug 06 2003 : 2:06:20 PM
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Remember to try mixing it with a little peroxide! The peroxide will add more oxygen to the mix and help the alcohol to do its work. Go with low concentrations initially though since you don't want to blow up your engine! Test in baby steps!
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 06 2003 : 3:25:07 PM
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Alcohol cools the intake stream, and has a high resistance to preignition then gasoline. So it's not the alcohol itself that increases power, but the fact that you can run higher compression and more aggressive timing.
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Aug 06 2003 : 4:26:04 PM
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don't forget. its a lawnmower engine. i can't ajust the timing. would the h2o2 react with the alcohol?
i'm lokin for simple, fast, and dirty power.
next stop: nobel prize winner! |
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Aug 06 2003 : 11:50:22 PM
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No, the peroxide just provides more oxygen. Think of it as a poor man's nitrous. Remember to put it in the air intake though, and not the fuel. The alcohol is a coolant to keep the extra heat from burning up your engine. Also, cooler engine gives a performance edge with some tuning, as Aaron says.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 07 2003 : 09:36:27 AM
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You can adjust the timing if you make and adjustable mount for the magneto coil.
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Aug 13 2003 : 4:24:22 PM
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again, tell more please
next stop: nobel prize winner! |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Aug 14 2003 : 10:39:15 AM
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I'm not sure what more I can give you. Build a mounting plate for the magneto that has slots so you can slide the assembly along the flywheel to adjust timing advance and retard.
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Aug 19 2003 : 12:26:03 PM
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Doesn't that assume a mechanical distributer? I'm not very familiar with lawnmower engines.
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propane as nitrus
