WetJet / Westcoast Pipes

QuickMick

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Yes, you are Mick...lol
Its just a old exhaust pipe.

I know what your talking about, I went to college for a year and a half for NDT. Also along with that was metalurgy/welding classes.
We worked with all the principles.
Live sources of Iridium-192 and Cobalt 64 live was pretty interesting to be around!

Anyways, good info on the Wetjet pipe, didnt mean to thread jack.

wow I dont know how I missed this post. Ize just giving Aaron stuff to read.

You can keep any Cobalt sources to yourself. I only read film, not make it.
Actually Im eyeballing a new welding machine for my shop. So I can mig with aluminum and ditch the tig for larger jobs.

Ok now what was the subject?
Oh yea Wet Jet pipes.. DISCUSS.
 
The pipe is jacketed and does not inject water into the pipe. So the first half of the Wet Jet pipe is 100% DRY. Did you plug the exit fitting and run water into the jacket to 100% determine if it did or did not inject water into the chamber? All Pipes have some form of waterjacket.

Yes. I pressurized it with air to make sure there were no ports in the chamber.

Aaron
 
Thanks for the info, I plan on modifying one of these pipes to go with my engine swap. It's always nice when someone has already done what you're wanting to do. Above you stated that the blue pipe was made by West Cost and the black was just a factory wetjet pipe. Mine is more of a purple color but I assume this is what you're calling blue. I'll post a pic once it's complete.
 
I haven't gotten mine running in a super jet yet so from a performance aspect I can't say. They do seem to run well on the wetjet (grew up on two). The weight of the westcost wetjet pipe is where the major difference is. Because half of the pipe is jacketed aluminum (two layers of aluminum pipe ranging in thickness from 1/8"-1/4" separated by air or water when running) and has a heavy aluminum bracket the whole thing is probably like 15 or 16 lbs. It's also huge and up on top of the engine making that side hard to get to when in the boat. (The b-pipe lays flat in the bottom of the boat). Lastly the b-pipe can be tuned for your engine by changing the amount of water injected into the pipe. This cools the exhaust slowing the spead of the sound waves causing the power band to come in at different rps.
 
I haven't gotten mine running in a super jet yet so from a performance aspect I can't say. They do seem to run well on the wetjet (grew up on two). The weight of the westcost wetjet pipe is where the major difference is. Because half of the pipe is jacketed aluminum (two layers of aluminum pipe ranging in thickness from 1/8"-1/4" separated by air or water when running) and has a heavy aluminum bracket the whole thing is probably like 15 or 16 lbs. It's also huge and up on top of the engine making that side hard to get to when in the boat. (The b-pipe lays flat in the bottom of the boat). Lastly the b-pipe can be tuned for your engine by changing the amount of water injected into the pipe. This cools the exhaust slowing the spead of the sound waves causing the power band to come in at different rps.
 
I’m guessing that you cut the stinger off of the pipe and rotated it 180* then welded it back? Someone correct me if I’m wrong but the pisser should tee in right before the stinger on that pipe as well as most other pipes. That way it kinda limits the amount of water entering the waterbox at light throttle and when pressure increases the cooling water that’s needed can make it to the water box. Some people also use flow control valves or limit the inside diameter of the stinger to prevent even more water from entering the exhaust. A main jet drilled out with a 1/8” drill bit, stuffed in the stinger works nicely until lake trash stops up the smaller hole. Those pipes work well but are heavy up top making the ski feel top heavy.
 
Put a T before the stinger for a pisser and was getting zero water out the pisser, all water going threw waterbox.. so I put a flow valve in and everything seems better once I tightened it down some. Gunna put my 5mm on and go test it in a few days
 
We had a wetjet growing up and my dad still has one, I’m pretty sure that stock they dump all water through the exhaust. Not all at the stinger, there is a cast aluminum exhaust elbow next to the jetpump where it dumps the remaining water. Anyways, is it possible that the jacketed section of the pipe is clogged with lake trash or something forcing all the water through the tiny holes inside the pipe designed to cool the chamber? You could try testing it with a water hose just barely turn the hose on. It would be best to test it off of the motor, if you leave the water running and the engine off you will end up with water in the motor once the water level in the manifold reaches exhaust port height. I have seen little sticks plug the cooling lines before and flowing water backwards through the system will often push it out into the jet pump. If you have a hose the diameter of your pisser and know what it looks like normally ridding then kinda whip the hose around and adjust water pressure until you get the waterhose to looks like the pressure coming from the ski. (A non scientific way to get close on water hose pressure)
 
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