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Old 02-02-2005, 12:47 PM   #1
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Default just out of curiosity, what would happen if you run unleaded gas?

What would happen if you ran unleaded gasoline in an RC car? Would it even run? I would never try it, just kind of curious as to why they dont use normal gas.
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Old 02-03-2005, 02:13 AM   #2
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It won't run.
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Old 02-03-2005, 11:26 AM   #3
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Also, because you have a 2 stroke engine, you need some sort of oil mixture or your engine won't be lubricated. That's just the first problem.
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Old 02-03-2005, 11:46 AM   #4
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You'll have the same issues that people have when trying to convert a gas full size race motor to methanol. The carbs are setup for a methanol based fuel. Mixture, veturis and porting would be all wrong. Plus gas burns hotter than methanol so expect a 20 to 40 deg increase in temperature.
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Old 02-03-2005, 08:43 PM   #5
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I'm pretty sure you'd never get it to work. I have never heard of anyone using gasoline in a diesel-style engine where compression is what ignites the fuel instead of spark.
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Old 02-03-2005, 08:48 PM   #6
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how does compression ignite the fuel though?
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Old 02-03-2005, 09:03 PM   #7
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compression of the mixture creates heat. The same holds true to our earths core, which is molten due to all the pressure placed on top of it. Pressure=heat=combustion
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Old 02-03-2005, 09:13 PM   #8
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That is how diesel engines run (our model engines are basically a small diesel). The glow plug serves to facilitate ignition to start the engine, but regular running requires compression to ignite the fuel. That's why our engines won't run without an igniter once they wear out.
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Old 02-03-2005, 09:26 PM   #9
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so basically the glo plug just gets the heat going? So your saying if you could somehow (this is just theoretical (sp?)) take the glo plug out, and keep the compression, it would still run? I guess so though, because the glo plug only gets heat when an igniter is on it. Well, things are making more sense now lol. so this is basically why deisels are indestructable lol. (and can like drive through water and stuff without stalling)
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Old 02-03-2005, 09:30 PM   #10
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Exactly.

The glow plug still does get hot during compression, which is why the glow plug temperature can change how the engine runs. Theoretically (although probably not in practice), taking the plug out while keeping the combustion chamber sealed, the engine would still run.
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Old 02-04-2005, 12:50 AM   #11
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Its the air compressing that makes the heat to ignite the fuel, not the fuel itself.
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Old 02-04-2005, 01:02 AM   #12
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Good call. Liquid doesn't compress (to a point).
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