Regarding the heads: you'd be hard pressed to find a DI engine with higher flowing heads than any Toyota D-4S engine. DI heads are going to be more restrictive than a PFI head, because mixture motion is created inside the cylinder. This isn't an S2000.
Quote:
Originally Posted by celek
Small problem there trying to work a pump at slower speed/votlage against fluid is not going to work.
|
So all the BMW's out there with ECU controlled variable speed electric water pumps don't work?
The best way to gain power with an electric pump is to control the coolant temperature with the thermostat and set the coolant temperature and pressure delta across the engine by changing the pump flow rate. This is exactly how mass produced with OEM throttled pumps (electric or mechanical) do it.