water pressure
 

can anyone tell me if there is a better location to draw water pressure from rather than the bottom side ofthe block.and the best place to install a pop off valve.thanks.

Re: water pressure
 

My pressure is taken from the intake manifolds...the pop-off valves are installed just prior to entering the cross-overs and dump out the side of the boat. Pressure is around 28 psi @ full throttle which is the pressure valves by-pass. The lower block location tend to become clogged over time (fresh water cooled)

Bob

Re: water pressure
 

What kind of pop off valves are most people using??? and do you install it before the water goes into the crossover???

Thanks

Re: water pressure
 

Mercury racing sells them for around $102. (cheap plastic)

installed before the crossover ... and after the oil cooler ...

Bob

Re: water pressure
 

Does anyone else make one??? If not where could I buy the Mercury racing one? Part Number???

Thanks again

Re: water pressure
 

part # 863208A 3 (Mercury Racing)

www.mercruiserparts.com (Bam marine) is where I purchased them.

Re: water pressure
 

bob thanks for the info.where did you tap your water pressure line from the intakes.i have supercharged engines w\no thermostats.

Re: water pressure
 

I used a spare temp sender boss on the front of manifolds.Here are a few pics of the installation

Bob

Re: water pressure
 

each dump is located just outboard of engines ... sorry its not the best picture ...