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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   Water dumps (https://www.offshoreonly.com/forums/general-q/355532-water-dumps.html)

payuppsucker 07-23-2018 05:42 PM
Originally Posted by vintage chromoly (Post 4639567)

I run a thermostat.
Hmmmm, with a stat and dry pipes I was at 55 PSI without a relief valse.
3/4 inch NPT dump in each tail pipe.
If I remember correctly you also run dry pipes....

vintage chromoly 07-23-2018 05:48 PM
Originally Posted by payuppsucker (Post 4639570)

Hmmmm, with a stat and dry pipes I was at 55 PSI without a relief valse.
3/4 inch NPT dump in each tail pipe.
If I remember correctly you also run dry pipes....
yes, dry pipes with 3/4” NPT dumps.

vintage chromoly 07-23-2018 05:50 PM
My water pickup is on the bottom of the boat. Flush with the bottom.

BenPerfected 07-23-2018 06:15 PM
We manage water pressure by bleeding off water from the front of intake manifold and dumping it thru the transom. With a restrictor in the water dump hose fitting, the water pressure stays at a constant 10-15 lbs.

payuppsucker 07-24-2018 08:37 AM
Originally Posted by BenPerfected (Post 4639576)
We manage water pressure by bleeding off water from the front of intake manifold and dumping it thru the transom. With a restrictor in the water dump hose fitting, the water pressure stays at a constant 10-15 lbs.
Why not bleed it off the rear of the intake and eliminate to possibility of steam pockets?

warlocky 07-24-2018 08:56 AM
Originally Posted by GPM (Post 4639562)
Did you always have to much pressure or is something restricting the exit path of the water, block or exhaust manifolds full of rust or dirt.
Its allways had high presure.WOT is 30 plus.i may have some restrictions.not sure.Just been building the boat the last 2 years.the 2 dumps i added to the rear of the intake worked but i dont get enough water to the front of the motor.

warlocky 07-24-2018 08:59 AM
Thats what i did.I dont get enough water to the thermostat to build any heat and it will run hot.my temp guage wont move even though its hot.no water to front of intake.

payuppsucker 07-24-2018 09:06 AM
Originally Posted by warlocky (Post 4639667)
Its allways had high presure.WOT is 30 plus.i may have some restrictions.not sure.Just been building the boat the last 2 years.the 2 dumps i added to the rear of the intake worked but i dont get enough water to the front of the motor.
I'd keep the bleeds on the rear of the intake but restrict them to the very minimum. This will eliminate the possibility of steam pockets which the engine will be more prone to develop when you install the water pressure relief valves due to lower pressure.

payuppsucker 07-24-2018 09:10 AM
Could you post some pics of your plumbing?

warlocky 07-24-2018 02:08 PM
I need to check this out.


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