@davidnunn posted:The only problem with the long coolant tubes is they increase resistance to coolant flow which in turn increases the likelihood of cavitation at high RPM. If you want to counteract this,...George Pence’s self bleeding mods work well too. That being said, all these mods do is add headroom. A stock cooling system with all the correct parts and properly maintained will cool just fine!
the other nuance is moving the pressure cap from the pump's discharge on the "swirl tank" after converting the overflow to a "pressure tank" on the suction side of the pump
and of course a water pump impeller that design provides internal sealing for pressure vs just volume