Water dumps
 

I have a warlock 25 sxt with a carb 502.i have to much water presure.I put 2 dumps off the rear of the intake with values to controll the flow but the motor dosnt get enough water to the thermostate.where is the best place to put my dumps.Thanks.

Put an adjustable pressure relief valve in the main water supply hose.

Wher did you get them and where do you install them at.

Hardin Marine or CP Performance. I prefer to put them in the hose that goes from the oil cooler to the motor so you get full flow through the oil cooler.

Smart.
Merc racing suggests to put there's and all water psi regulators after the oil cooler but before the block..

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.

Why not bleed it off the rear of the intake and eliminate to possibility of steam pockets?

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.

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.

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.

Could you post some pics of your plumbing?

I need to check this out.

couple things can cause high water psi. Depth of the water pickup on the hull, restrictions on water exiting the engine. Such as, thermostat, too small lines to exhaust, etc. Personally, before bleeding water off, i try to make sure there is no exit restriction. if there isnt, than I'd take a good look at the pickups, If they are thru hull, and mounted excessively deep, raise them/trim them. Having them deeper than they need to be, only to blow the water off the side of the boat , is a waste, and on some boats, can scrub a bunch of speed. The pickups on my fountain are almost even with the bottom like Vintage's .

My pick up is on the drive.dravo 1 standard unit

are you running the stock circulating pump or a crossover? If a crossover, what size is the bypass and lines going to exhaust?

all stock stuff.side mounted water pump,running stock circulating pump.going to check my exhoust.pull the risers and see if there are stoped up.i have my water presure line in the block wher the side drain is.will that make a difference how the presure reads.

keep bleeders at rear of intake, the ones you're currently using are likely too big and are bypassing too much water, -4 hoses will flow enough water out and away from rear cylinders. (typically the problematic area of BBC) and rid potential steam pocketing of rear cylinders, what is your water pressure at speed?

That location works fine, but the hose may clog easily.. Thats where it was on my Pantera and clogged all the time. The ones on my AT are in the intake manifold and never clog.

I added a presure value to the intale line after my cooler.the hose was allready cut there.......got it set to the lowest possible rate.check all lines,exhoust risers are clean.move my presure line to the intake.i still peg the gauge.if my s pipes are to close to the exhoust will this raise water presure.i might cut the y pipes off to get them away from the riser pipe......can i get block off plates for a bravo 1 that draws water at the sides.

Post a pic of your setup.............

It wont let me post photos.

https://cimg6.ibsrv.net/gimg/www.off...4e3201a4ef.jpg
https://cimg1.ibsrv.net/gimg/www.off...4283b96f2e.jpg

You said you have the regulator set to the lowest rate...........meaning you have it screwed all the out.....counter clockwise?

yes.thats where i get the most water

The most water coming out of the dump or relief port?

only exit i have are the exhaust and one dump with the relief value

You said gauge is pegged.........what's the range of the gauge? 0-15, 0-30, 0-50?

0 to 35

There has to be a blockage somewhere. You still have the dumps off the rear of the intake?

no.The only restriction i can think of is the s pipe is to close to the end of the riser causeing a back up kinda.everything is clear.i think i saw some deals you block off some of the holes on a bravo to decrease the water intake to help this sence my lower unit is so deep in the water

You shouldn't need to do that with the relief valve. At what speeds/RPMs are you seeing the excessive pressure?

mid to wot