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Old 10-26-2005, 12:00 PM   #1
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Nitro Engine Modifications

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I've heard a lot of mention of people modifying their motors for better performance, and was wondering if anyone has a good source of information on this topic.
I'm specifically looking at modifying an OS RG that I have here for a little more performance. The problem is I can't seem to find what I'm looking for using the search engines on the net. Any help is greatly appreciated.

And since we're on this topic, does anyone out there have any success stories or advice about modifying nitro engines? Maybe some performance tips or tricks? Might as well get a discussion going!
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Old 10-26-2005, 12:10 PM   #2
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I've modded my engine with pretty good sucess. When you take the sleeve out (used engines will have this) there are some dark marks on where the air and fuel mixture travels. Grind this area down as it will create a larger channel for the air to flow. Then angle the port. The key to porting an engine is letting the air flow as best as possible. Angling the port lets the air shoot up into the combustion chamber more easily. So you can do this to your intake and transfer ports. Leave the exhaust port alone. The exhaust output on the engine block can also be opened up, but only if it hinders exhaust gas flow. I don't think it should be a problem on the OS.

If your engine doesn't come with a knifed con rod, you can do that. But be aware that it may weaken the rod.
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Old 10-26-2005, 12:57 PM   #3
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It is not the right motor but it will give you the basics

If you can’t afford to junk your engine, stop now If you can’t afford to throw away your engine, you shouldn’t make any of these mods. If you take your time and are patient, it’s unlikely that you’ll destroy your engine, but a slip with the grinding tool or a mental goof could turn your engine into a paperweight. If you can’t afford it, don’t even consider modifying your engine.
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Old 10-26-2005, 01:35 PM   #4
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ya.. i went looking for tha tarticle as well.. it is a good basic point to start with.. and will work as long as you follow the concepts..
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Old 10-26-2005, 03:40 PM   #5
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I think i'm going totry something with this RG that i have (since igot it so cheap) and i'mnot sure if anyone has done thiskind of thing before. I'm going to send out my piston (not sleeve), con-rod and main bearing to be cold treated. I've beendoing a little reading on this subject and aparantly on some engine applications (automotive type engines) the results are hudge. This process aparantly strengthens the metal and prolongs its life. They use it on all kinds of cutting tools.

More info to come.
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Old 10-26-2005, 04:00 PM   #6
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My uncle owns a machine shop where he manufactures racing engine heads (I mean 1:1 race cars, he did some stuff for Nascar), so he was telling me how he ported his helicopter engine for his .90 size heli, unfortunitely he lives in windsor so I can't exactly just ask hime to do my engine...

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