Exhaust Tube Question

Designs for inboard or outboard power

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bob smith
Posts: 487
Joined: Thu Aug 21, 2008 6:59 am
Location: Chester, SC

Re: Exhaust Tube Question

Postby bob smith » Tue Aug 08, 2017 4:41 pm

I used SS elbows and wrapped them with heat wrap from my local hot rod store. They work fine. Also note that corrugated exhaust hose is quieter due to its ability to absorb exhaust pulses and the ribs act as mini baffles. The effect is to dampen the higher frequencies and reduce the annoying "bark".
Bob Smith
Chester, SC

Ozzieboat
Posts: 225
Joined: Sun Jun 07, 2009 4:40 am
Location: Logan, Queensland, Australia

Re: Exhaust Tube Question

Postby Ozzieboat » Tue Aug 08, 2017 8:37 pm

Jimbob
A fellow Monaco builder down under used mufflers on his PCM343 engine, these were from Eddie Marine. Might be worth a look.

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jenko
Posts: 815
Joined: Sat Mar 19, 2011 2:50 am
Location: Pine Mountain . Vic . Australia
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Re: Exhaust Tube Question

Postby jenko » Tue Aug 08, 2017 11:29 pm

I used these mufflers
https://www.ebay.com.au/i/390375664090? ... dispItem=1
They didn't have stanless internals but the guy made some with stainless internals for an extra $10.00 each . He will also make larger sizes.
no effect on performance and reduced decibells from 98 down to 70 (measured @3000 rpm between exhaust outlets 1 metre away)
I welded them onto the stainless pipes and they are only 1/2'' larger than exhaust tube in diameter
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