Dry Exhaust Connections
 

I've searched the forum and can't find any detail on this topic.

I'm thinking about dry exhaust, and would like to see how the connections are handled (i.e. like what you see in staggered twins or trips applications). The water jumpers are self-explanatory, but how are the pipes connected together? Are both inner and outer tubes welded to a common flange, and then the flanges bolted together with hi-temp RTV for sealing? Any pics of this would help.

FWIW, I modified my exhaust to be a dry setup.... I basically had a high end exhaust shop by me design mine like Eddie Marine sells their dry risers... Theres no water jumpers.. its just one piece all the way out. You drill the transom with 5" hole saw, the 4" pipe will slide through, and then the exhaust flange/gasket seal off the transom from water entering....

[ATTACH=CONFIG]542464[/ATTACH]
[ATTACH=CONFIG]542465[/ATTACH]


And this is the end result.....

[ATTACH=CONFIG]542467[/ATTACH]

I see there is a hose from the manifold to the exhaust
pipe. Is that for cooling? If so where is the water dumped?

Right at the end of the pipe, just as exhaust gasses come out too

That is the raw water/cooling water feed. The tail and manifold is still jacketed to keep cool. The water can be dumped overboard prior to the tip, mix at the very tip or a combo of both.

Does this eliminate reversion?

It has for me! I had mine custom built by a performance exhaust shop... took my original risers, cut them open, welded the inside pipe as long as I needed, and then the outside pipe the same, so there's a water jacket all the way out, and at the end he cut out 3 notches in the inner pipe, then expanded the inner pipe and welded the inner and outer together. And where the 3 notches he cut out, are where the water exits.... which is right at the end of tail pipe so the water pressure alone forces it past where the exhaust gasses could suck it back in. But my understanding is simply mixing the water that much further down the pipe prevents the reversion BC there's less back pressure or whatever further down the pipe

Thanks to you all. This is a great thread!
A lot of good information.

Can someone with a dry exhaust system with multiple pipes and jumpers show some detail photos on how the pipe connections are made? I'm still confused here. Long tails are clear enough.

Yaa.. I'd like to this method as well