i did a foolish thing, that has worked out pretty well... after a spate of cooling system problems i ended up making a fully electronic cooling system -- electric pump from Davies Craig via Pegasus Racing, wrote a ton of software for it, and now have a killer cooling system that regulates within a degree or two of setpoint. draws about 200 watts at full blast. been running this for most of a year. new engine, and i've added a separate and additional head/block circulation pump that ensures even heat and measurement separate from the radiator pump. software does full feature warmup, cooldown cycle, etc.
i can't find even one example of such a thing out there. the only use for electric pumps seems to be drag racing, where it's on/off, or crude control. mine's got two P.I.D. software control loops that holds temp tight as you desire.
ran it on a rally, here was the peak test: 26 of august, in Badwater CA in Death Valley, 112F ambient, climbing the 8% grade at full output 60 MPH, temp locked at setpoint 188F at what i estimate 80% capacity. $139 two-row Jegs aluminum radiator. probably 150 hp working hard.
hardware is arduino based, with some fat MOSFETs and two Stewart Warner sensors. controls coolant pump, radiator fan, and (new) circulation pump. half thinking of contacting Davies Craig to see if they want it. anyone interested in messing with this?
