20-25psi at WOT is a good number to shoot for

Ok so port on front of intake is where my water temp sender is. So block is the only location, Water pressure gauge and all the tubing were installed over the winter in a freshly redone motor, and I am just not reading much of anything. when I rev the needle will jump a little then go right back down, and running I don't see anything really. Like I said motor is fresh, impellar is new, gauge is brand new livorsi gauge, all tubing is new, and no overheating at all with plenty of flow out of the exhaust. We are going to take it apart 1 day this week. I have a crossover kit with bypass, and running a thermostat. Could that effect the pressure I see?

Running on the hose or in the water? On the hose you won't see any pressure, and only a couple pds with a quick wrap of the throttle

Are you running it in the water or on the hose???
If its in the water and you're not getting any or very minimal readings, you probably have a kink in the tubing.

A way to solve the puzzle is use a hose from the intake manifold and dump the excess water out thru the transom. To get some/slight water pressure, we tapped and screwed a restrictor into 90 fitting out of intake sized to achieve the targeted water pressure. We use a 2-stage water pump and hold about 10 lbs water pressure in the intake with a water temp in the 100-115 degree range....no thermostat used.

So I am replacing my current crossover with a Hardin (Bypass), reason being is my current setup wont allow me to run a T-stat because no water could get to the manifolds/ risers until the stat opens, with that said, I see allot of posts here saying they are running gauges to the top of the housing, if so would you not see any pressure until the stat opens?

Both running on the hose and running in the water. Seems to act that same in both situations. I know I am flowing plenty of water, as there is plenty coming out of the exhaust, water temp, and oil temp are low as the water in the river and bay is on the colder side this time of year. So it leaves me to think either 1. The crossover with bypass effects the water pressure, or 2. there is something wrong in my gauge and tube set up. Whether that be the hose is pinched or clogged somehow or something is wrong with the gauge itself even though its brand new. We were out in my buddys 38 AVS sunday, he has cross overs with out bypasses and both his water pressures were registering fine, right about 20psi. So wonder if the bypass flows too much water compared to the flow through the block?

Simple way to check guage. Connect a new tube and put 20 psi of air to it.
I doubt it is the guage. The tubing kinks easily and that is most likely the issue.

Ok, yea that was our plan to pop it with some air and see. I will also check the line for any kinks.

One of my gauges was a little lazy last year - would show some pressure, but quite low. ...then would hold pressure after engine off.

I flushed with compressed air - and this nasty, smelly, gunk came out!!

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