Exhaust Cones

Automotive powered airboat discussion.
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digginfool
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Exhaust Cones

Postby digginfool » Wed Jun 13, 2018 10:42 am

Has anybody ever used exhaust cone inserts like the Vortex? I recently had to ditch my mufflers due to excessive back pressure. Right now running open exhaust (I have 4 feet of 3" flex pipe after the headers) which I'm sure doesn't make me any fans. I don't see how an insert could reduce sound levels that much but worth a consideration. Also, open to any muffler suggestions. I need to keep overall length as short as practical and want stainless. I'm looking at offerings from Kook that are about 16" overall. Magnaflow and Dyna have mufflers in the 19" range but 16" sounds closer to what I'm looking for. The long tube headers and through hull exhaust makes it tough to fit long mufflers.
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John Fenner
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Re: Exhaust Cones

Postby John Fenner » Wed Jun 13, 2018 11:14 am

I put cones inside mufflers on Geralds screamin eagle, I build them from perforated stainless, and make them longer than store bought units, can insert them into 3' tube of any length needed.
I never finish anyth,,,.

diamondback0320
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Re: Exhaust Cones

Postby diamondback0320 » Wed Jun 13, 2018 11:34 am

John do you make them for 2.5in also..have a pic?

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John Fenner
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Re: Exhaust Cones

Postby John Fenner » Wed Jun 13, 2018 11:47 am

Yes I do, will have to search up a pic.
I never finish anyth,,,.

ladyblackwater
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Re: Exhaust Cones

Postby ladyblackwater » Wed Jun 13, 2018 12:40 pm

Diggin MagnaFlow makes them smaller than 19" over all length. My opinion MagnaFlow is the way to go. They last a lot longer and they actually cut back on the noise. What boat are you looking at them for? I can get you any MagnaFlow you want. I'll look in my book when I get home to see what is the shortest I can get. I know the ones I run are only 11" complete length.
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diamondback0320
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Re: Exhaust Cones

Postby diamondback0320 » Wed Jun 13, 2018 1:17 pm

not to hijack the thread but I'm also trying to find the shortest for aircraft.. I'm in same boat as diggin..the way my cage etc is setup & thru hull exhaust I keep breaking the flex in 2mnths because it's under so much stress..

SWAMPHUNTER45
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Re: Exhaust Cones

Postby SWAMPHUNTER45 » Wed Jun 13, 2018 8:04 pm

Like I said

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