I need some help with my jet boat w/ ford 460 berkeley jet. it is still building too much water pressure at 3,000 rpm after install pressure relief valve. It builds 20 psi plus even with the valve all the way open. I used -8 stainless hose through out the whole system. Off the pump I have a tee installed with the pressure relief valve then from there goes to the front to another tee then goes into front cover. Off the intake manifold one port goes to another tee then dumps out of the transom exhaust. the other port on the intake manifold goes to the water injection on the headers. ??? I don't know what to do ???