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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Port Matching the TT mufler...
11-04-2004 06:25 AM  13 years agoPost 1
skwarwheels

rrNovice

Santa Clara, Ca

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I just purchased a used Raptor with a TT50 engine and the TT HiPo muffler.

While taking things apart to see how they work (hehe!) I noticed that the exhaust port on the muffler is a good 20% smaller than the exhaust port on the engine.

Has anyone out there tried hogging this out... I mean port matching this exhaust to the engine?

Can I expect 20% more power by doing so? Can I expect ANY more power by doing so.

I noticed that some people are happy with the power from the stock motor, and others wouldn't have it any other way than to have a MP2 or a Hatori. I was just wondering if I end up with something kinda in the middle for free.

Let me know what you think...

Michael

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11-04-2004 06:29 AM  13 years agoPost 2
zoro

rrApprentice

Cairns

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Have a go Micheal and let me know what the results are.
Regards,
Kent

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11-04-2004 08:27 AM  13 years agoPost 3
Gadgets

rrApprentice

South Africa

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I normally smooth the sharp edge out.

So that the air does not hit head on.

I will post a pic when I take one





I see plank flyers!!!

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11-04-2004 08:53 AM  13 years agoPost 4
steve69

rrApprentice

Berkshire, UK.

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I always port match the exhaust and it always make a small but noticable difference

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11-04-2004 09:02 AM  13 years agoPost 5
frogbaiter

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Oxford UK

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Is that why you took the end off your MP, Steve?


Steve
www.helicollective.org.uk

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11-04-2004 10:59 AM  13 years agoPost 6
steve69

rrApprentice

Berkshire, UK.

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Well it must of been more powerfull cos it was LOUD!!!!

Strangely thats the only pipe that didnt need porting to fit.

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11-05-2004 05:49 AM  13 years agoPost 7
skwarwheels

rrNovice

Santa Clara, Ca

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I just took a better look. There is a good 2 to 3 mm on each end of the opening. The problem is that the throat tapers on the outside too much to open it up on the inside properly. The best I can do is create a taper so that it doesn't have to hit it square on, like Gadgets said...

Very sad...

Looks like there's a MP2 in my future.

Michael

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11-05-2004 06:38 AM  13 years agoPost 8
TMoore

rrMaster

Cookeville, TN

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IMHO, you are wasting your time.

Unless you have a dyno and can measure the before and after you don't really know for sure if there is a gain. I've tried it and it isn't worth the effort. If there was an improvement companies like Hatori, KSJ and Funtech would port match their mufflers.

Most of the contest pilots that I know don't bother. They need all the power they can get but don't look for it at the exhaust port.

TM

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11-07-2004 02:27 AM  13 years agoPost 9
skwarwheels

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Santa Clara, Ca

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TM, I agree with you on the waste of time. I thought that I had stumbled onto something free and easy...nope!

Michael

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