Wet Exhaust Exit Gooseneck x2 Lift?

[Delancey]

I am doing some studying on wet exhaust systems and have ran across a couple references about including a gooseneck or swan's neck at the exit as an additional guard against back flow similar to the one in the attached image.

While not directly increasing the amount of water the muffler must contain, this would seem to me to increase the overall amount of lift and therefor the overall amount of back pressure in the system.

Is this a concern or does it not matter?

[Terra Nova]

Run the exhaust line as directly as possible from the water lift muffler to the highest point in the run, then down to the exit, with no traps in it.

[model 10]

Originally Posted by Terra Nova

Run the exhaust line as directly as possible from the water lift muffler to the highest point in the run, then down to the exit, with no traps in it.

With as stiff as this hose is , a loop like that is more realistic that some sort of bend.

[Terra Nova]

No...Traps!

[OwenMcCall]

I was worried about back pressure when I set up my system, as the total rise was large (~6 ft.). So I measured it; was way, way below the maximum acceptable (but I did use very large diameter hose - that helped me out I'm sure).

[chris95040]

None of the wet exhausts I've ever owned had that loop, but I have seen that described. Always just rose up up up, then down 1-2 feet at the exit.

One thing I never satisfactorily understood is how to figure out if your exhaust line is going to flood your muffler (and beyond, back to the engine) when you shut down. It seems figuring out just how much water is really in that line at any given moment is impossibly complex, it's some raging mix of exhaust and water...

On the other hand, usually your exhaust riser is up high enough to help minimize concern of reaching the engine. I dunno..