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HomeAircraftHelicopterHelicopter Main Discussion › Is it okay to run a slightly bigger muffler on OS 37?
04-10-2018 11:57 PM  7 months agoPost 1
Infarcted

rrApprentice

downunder

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Well ,hate to bore you guys in asking an old school question ,especially in electric era , but I have new .46 ARK muffler with rubber cap which I want to use with an OS37 in a Raptor 30.I'm really just seeking some answer if this will be compatible or not, not really concerned about mount hole sizes ,etc. Thanks in advance.

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04-11-2018 12:07 AM  7 months agoPost 2
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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That's an odd question.
Is it okay? I don't think anyone will care.

The real question should be "Will the power be better, worse or the same as a tuned pipe / tuned muffler".
That, I don't know.

I suspect it will be a little bit louder and less power than a tuned pipe / muffler designed for an OS 37.
... just seeking some answer if this will be compatible or not, not really concerned about mount hole sizes ,et
You seem to think it will be.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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04-11-2018 12:14 AM  7 months agoPost 3
JuanRodriguez

rrProfessor

The Villages, Florida

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I don't think you will have any issues....

Been there, done that and old enough to know better.....

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04-11-2018 12:40 AM  7 months agoPost 4
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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Give it a try, I foresee a lack of back pressure and not to sure if it will provide enough pressure for the fuel tank. It may cause the engine to run leaner.

Check the engine temperature often.

spending time, paying attention

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04-11-2018 01:08 AM  7 months agoPost 5
Dr.Ben

rrMaster

Richmond, VA, USA

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I did it. Used an old 60 sized Hatori 666. Worked great but I had to sleeve the exhaust opening a bit to get enough back pressure for proper needling. Made great power once I did that. Nice and quiet too.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-11-2018 10:11 PM  7 months agoPost 6
oldfart

rrProfessor

Vancouver, Canada

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That ARK 46 muffler will work fine with your OS37. The only problem you will have to work around is relocating one of the mounting bolt holes inward as the spacing is different on the OS37 then on the OS46

Phil

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04-11-2018 10:27 PM  7 months agoPost 7
grimthenoble

rrApprentice

Viroqua, WI

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sell the 46 pipe and buy a 37 pipe?

Never go Full Retard!

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04-12-2018 07:05 AM  7 months agoPost 8
IYKIST

rrKey Veteran

London united kingdom

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The 46 pipes had less volume than the the pipes or mufflers for the 37's of today, I doubt you would have a problem using it as long as it mount right.

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04-19-2018 12:47 PM  7 months agoPost 9
InvertedDude

rrVeteran

USA

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OS37 with TT50 pipe
I run these combo, had to bore out the holes to match the OS37 port. It runs mean and fast. I think better than a 30 tuned pipe. No power on bottom end but mid and upper just sings.

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