Talked to Lightning and even though it has already been stated in this thread, I can't say enough for the customer support I have gotten from them!! They have earned a customer for life. I'm going to ship him my headers today and he is going to dry them for me and hopefully have them back in a couple of weeks!!!

Scott, where would the water be introduced in a design like that?

Past / Just past #232 in that one. The one I have designed on paper , that I keep kicking around the idea of, is very similar to that but less 'bulbous' on the outer pipe. Exact same function though.

We'll see if I get around to it....but would almost wish an exhaust company would incorporate it into their collector / tail...would be better / easier for the consumer.

Edit in: 220 is the inlet side. 232 is the outlet side.

SB i am going to go dry until last 3-4" from tip and introduce the water about 3" behind that with a flare similar to Boatally Insane. since we are extending my risers and a good friend of mine is a top notch stainless/metal fabricator i may have him bulge the 4" slightly around the lower half of the 8" of new section we are adding (it will be water jacketed) and it already has 1 dam at the top bend in exhaust tube but was going to add a second at the new section we are adding on. what do you think? My cam specs are very similar but in a 434 sbc and idle at 950 RPM (112 lsa installed on a 108ICL).

I know this example is headers but my risers off manifolds are atleast this long judging by distance from back of block and make a very similar angle downward sweep. https://www.youtube.com/watch?v=iDiDeYCziU0
**not counting rubber exhaust hose**

and since exhaust will come down to 3-4 " from exit of tip and water will be introduced over extended exhaust pipe about 3-4 inches behind that i was thinking of incorporating this into the water jacketed exit of the water to still cool pipe but give it enough velocity for the molecules to somewhat stay together in a stream pattern till it exits?
https://www.youtube.com/watch?v=LAnkdbDFSeo

**only the external water ring**

COREY331
Where did you end up with this? Did reversion stop?
I am at the same spot today. Fixing to extend the inner tube way out, but dont want the noise.

Well, I sent the headers out to be made dry. Was told it would be a two week job, and its been a month and I'm pretty sure he didn't start on them till last week.

I made the decision to make them dry because I know that's the only way my OCD will allow me to not worry about reversion ever again. I know its going to be really loud, but I figure I can clamp on some nice looking mufflers in the future if it bothers me too much.

I am heading in the same direction except I have Eddie Marine alum manifolds and we are welding on 3" alum tube extensions about to the transom area. Maybe we can stop 3-4 inches short and it will stop the reversion but still let the water muffle it a little. If not, we will add more to the very end.
I also have mega condensation going on in the manifold. Maybe reversion is making it much worse, will see. Fix the reversion then check for condensation.

Let us know how it turns out.