Thanks Buck - planning on Friday after work, or possibly Saturday if it rains. Motor was sat down in the boat last night. Going to hook everything up this evening and get the drive back on it. Exhaust shop is going to weld a 3 1/2" diameter pipe in just upstream of the water pipes that will flare out to the 4" inner pipe diameter. The idea is to let it act like a turbulator while also directing the water spray back to the tips. Going to let it extend out the back from the 4" inner an additional inch or so for good measure. I think that should solve my problem. I'll update when it happens. Thanks for the advice and encouragement guys.

Sounds like the great American craftsman is still alive and well. Sounds like a good idea good luck with the maiden voyage.

It's just interesting to me, you having to re-engineer your exhaust with that mild of cam. Please post pictures of what you do to your exhaust.

motor, I'm pretty baffled about it too - never dreamed it would come to this. I selected that cam because at first glance the specs led me to believe it would be ideal with my setup. There are folks running the Crane 731 cam even with silent choice systems, and that appears to be a more aggressive cam on paper. I might be worrying about nothing, but I've come this far on this build so I'm going to do my best to make sure it will last a while. I just want to put the hatch down for a while and enjoy the boat!

I'll post up some pictures when I get them back. Makes me wonder if this would help out the folks who were having issues with killing O2 sensors on their Lightnings.

I do not believe the boat exists. 10 different threads on engines but not one boat thread! We need proof of life on the boat! :lolhit:

You caught me - it's actually an aluminum jon-boat that I'm putting it in. That explains the need for the aluminum heads to keep weight down.

I think the old tub can be seen in the background of a couple of the shots. Definitely retro-ghetto-redneck. :D

After suffering through 18 pages of this dilemma we are entitled to a video soon!!!

HaHa, I'll have to borrow my daughter's GoPro cam.

The Fix is in...
 

Here is what we came up with. He let it run long so I could measure how much I want to cut off. Going to let it run about 1.75" past the original collector on top and slash cut it down to about 1" past on the bottom. He also gradually flared it from 3.5" up to the original 4" inner diameter for minimal disruption of flow. Might add a bung later to bleed off any excess water, but I think this will do a good job of diverting the water downstream and prevent it from getting sucked back in. Hopefully this will fix my problem.

http://i1224.photobucket.com/albums/...612_224020.jpg

http://i1224.photobucket.com/albums/...612_224032.jpg

Back side - thought he did a nice job gradually flaring it out to meet the original pipe:

http://i1224.photobucket.com/albums/...612_224044.jpg

I bet your kids are like "dad when is the boat gonna be done already!?" Lol. Good to see you might have it fixed. Looking forward to this video myself.