Offshoreonly.com - Affraid of reversion, exhaust HELP?

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - Affraid of reversion, exhaust HELP? (https://www.offshoreonly.com/forums/general-q/372500-affraid-reversion-exhaust-help.html)

JaniH

12-05-2021 01:36 PM

Quote:

Originally Posted by ctuck0659 (Post 4814101)

Just a thought- take the risers to a skilled tig welder and have him extend the inner 3" pipe through the transom. That's what I did when I got tired of worrying about reversion.

Offcourse, but the silent choice is a must for me.

JaniH

12-05-2021 01:41 PM

Quote:

Originally Posted by 1MOSES1 (Post 4814133)

This is what we did when we were concerned…run dry exhaust.

https://cimg5.ibsrv.net/gimg/www.off...c2b8daf4d.jpeg

My ears hurt just for looking the picture :D. And yes, i love the big inch bbc sound but not in every situation.

Gboat

12-05-2021 10:26 PM

Quote:

Originally Posted by ctuck0659 (Post 4814101)

Just a thought- take the risers to a skilled tig welder and have him extend the inner 3" pipe through the transom. That's what I did when I got tired of worrying about reversion.

I totally agree with this^^^ it works, you should give it a try.

JaniH

12-06-2021 02:18 AM

Quote:

Originally Posted by Gboat (Post 4814197)

I totally agree with this^^^ it works, you should give it a try.

Allready extended to the transom, check the pictures of the first post. I have a pair of CMI sound eliminators, but dont know how much those will effect, not much info about them in the internet.

JaniH

12-06-2021 04:44 AM

Quote:

Originally Posted by JaniH (Post 4814201)

Allready extended to the transom, check the pictures of the first post. I have a pair of CMI sound eliminators, but dont know how much those will effect, not much info about them in the internet.

https://cimg8.ibsrv.net/gimg/www.off...2ed0341e40.jpg

SFOcean

12-07-2021 08:11 PM

I used to run CMI sound eliminators, they work well and are convenient as they are automatic.
However they don't work well for engines over 700 HP as they can't flow enough exhaust gas.

Griff

12-07-2021 11:49 PM

Quote:

Originally Posted by JaniH (Post 4814161)

Offcourse, but the silent choice is a must for me.

The extended risers you show with the silent choice you have pictured makes no sense. How could that possibly work??

JaniH

12-08-2021 01:25 AM

Quote:

Originally Posted by Griff (Post 4814393)

The extended risers you show with the silent choice you have pictured makes no sense. How could that possibly work??

Thats true. the diverter is just laying on the inner pipe extension , wich is not cutted yet, but it is impossible to know the correct extension lenght before the engine is installed to the boat. Trying to get the diverters as near as possible to the transom, so the diverter outlets for the y-pipe is going to be cutted of and turned 180deg, that is not yet done in the picture, but i tought it would give an idea how it looks like when it is done. the riser dimensions in the first post are rough estimates of the final dimensions when everything is fitted. Hope this makes sense.

phragle

12-08-2021 07:25 AM

Isnt the diverter location dictated by the y pipe location?

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