The motor that I want to put in the '28 will be comming out of my BGF drag boat that I dont run anymore and likely never will. The blower manifold is an older Cragar that does not have a thermostat houseing. This is what we want in the boat since it uses a rubber impeller waterpump that is plumbed with 1" braided teflon lines,into the front of the block (same as a car) and then out of the manifold, and then overboard. Obviously I cant use a constant loss cooling system in the car,but I cant use an automotive waterpump either because the magnesium nose on the Moonyham 6-71 is the short type,there is no room for a waterpump. I can use an electric waterpump , OR, I can use the marine pump,which is almost the same thingbut in some respects better because it does not run at a constant speed,rather its speed varies with engine speed,it is driven off of the camshaft on the front cover,just like an injection pump.The bad news is that it is a positive displacement pump,not a centrifugal type,sothere is no provision to control pressure when it flows more than the system will.The pressure just builds.At 7000 rpm,this will be about 70 psi.It will blow head and intake gaskets where they seal water passages. In a drag boat I controlled this with an adjustable pressure regulator from a hot water tank,thats right a TPI valve and set it at 30 psi. The bypass water is plumbed forward thru the V-Drive water jackets and then overboard. Now the "situation". I can set the TPI down as low as 10psi,but where do I run the bypassed coolant?If I run it back to the suction side I will create a loop and coolant wont ever circulate thru the rad,or will it? The disharge hose off the intake manifold will go to the top tank of the rad,the suction side of the pump will be plumbed to the lower rad tank. If the bypass coolant goes to the top tank ,it will mix with the hot discharge coolant and circulate down to suction. So the engineering delima of the day is "where to run the bypass to???" And of course, Why?
There is another option.I could machine up some aluminum spacers to mount an aluminum L-88 corvette waterpump (I have a couple NIB) away from the motor far enough that the v-belt would miss the blower belt. I could drive it with the v-belt pulley that would bolt to the crank blower drive pulley.I will have to make one of these anyway to drive the alternator.With this setup I would need some kind of remote thermostat houseing between the blower manifold water dishcarge and the rad top tank. I will probably need this with the marine pump too though and someone must make them.
Sorry,no pics of this set up as the motor is still in the boat and the boat is back in toledo.