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Water pluming for jet boat

6K views 21 replies 7 participants last post by  cordog009 
#1 ·
Hey guys im new to the boat scene and im getting ready to drop my engine in and i have a few questions about the water pluming. It has a 557 ford with bassett thru transom headers and a berkley jg jet pump. According to basset i just need a ball valve coming from the jet (also i know i need to plum in the basset valve for the injection lines and install a ball valve coming out of the engine to set what rpm the injection lines supply water to the headers) to regulate how much flow or pressure? Is going to the engine. I have heard on this forum about some people putting in a water pressure regulator and setting it at 10 psi so i dont have to worry about putting to much water pressure to the block. Would this method be better than using the old style ball valve setup???
 
#2 · (Edited)
You may want to try a search. This has been hashed out quite a bit. I'd throw a pres gauge on there and see if you even need to worry about it. Some guys will tell you to keep it simple(gate valves), some will tell you to get a regulator,some a pressure relief valve, some will say banderlog,ect,ect,ect. Fwiw to plumb it like bassett says the second gate valve goes on the dump line. The more you shut it the sooner(in the rpm range) the headers will get wet. Edit: Ooops I almost left the 4 port thermostat guys out.lol
 
#4 ·
How would you even begin to plum that. It looks like in your pictures that from the jet you have both the block and thermostat plummed together. Which doesnt makes sense to me because the block should be the in and the thermostat is the out, so it can circulate
 
#14 ·
Thanks everyone for all your input. I think i found my solution. Im gona run a electric water controler and a pressure regulator just to be safe. I dont really want to pinch pennies on the water setup and ruin a $11,000.00 engine setup because i didnt wana spend another $300.00
 
#16 ·
The auto water injection setup's are really nice! Just make sure you
put a shutoff valve in-line in case something goes wrong. Oh, & if you
have a descent size cam don't try injecting @ 1500rpm's, set it @ 2000.
The pressure regulator 4trax showed is the same one I'm using also, it
works good. You can get it at McMastercarr.com. Good luck & have fun
plumbing. Also, post some pics when you get a chance!
 
#17 ·
This is what alot of people run.



Header Water Pressure T-Valve

This valve is a must in all water injected headers It is designed to eliminate water flow at an idle while providing water flow under increased rpm's All three connections of the valve are -8AN
 
#20 ·
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