Of carbs and pipes - RCCanada - Canada Radio Controlled Hobby Forum
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Old 01-01-2005, 08:33 PM   #1
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Of carbs and pipes

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Looking around my bench last fall I decided I was only a few parts short of having being about to build a Gas Ergo. As I already had a .90 Nitro Ergo and a few other machines I rounded up the parts and have been slowly putting the new model together.

Now I've come to the part where I need to buy an engine. I've pretty much made up my mind I want a Zenoah G26 Heli, but am having trouble deciding on a carb and pipe.

I see WT643 and WT677 carbs listed for this engine at Horizon, does anyone know which is the better buy? Why would I want a WT677 over the WT643 (or vice-versa).

As for a pipe, I've only found two choices. Either run the stock muffler or get a Hanson pipe. Does anyone know of alternatives? I'm kinda used to the power of a .90 nitro so I'm not sure I'll be too happy with just the muffler but I've heard the tuned pipe can be very loud. Is this true?

There aren't many gas heli fliers in my area (which is part of the appeal for me building the machine) so any help/guidance is very appreciated.

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Old 01-04-2005, 08:51 AM   #2
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I am: Colin B
Join Date: Jun 2003
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I don't find generally that mufflers make a big difference on the power other than for flow and most importantly noise. The port timing is basically modified weed wacker. I had tried a Mac's quiet pipe which did boost power notably, but it was real long. Some basic pipe theory linked below.

For the carbs it depends on the gear ratio, blades you swing and which version of the G-23.

Align R/C, OS Engines, Futaba, Great Hobbies, Hatori, SGP, Morgan Fuels, Castle Creations
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