Before I began the fabrication of my twin turbo set-up, I knew I would need all the real estate I could get. Along with a few other things, I chose to go with an electric water pump. I also don't have any other accessories except for an alternator. And I also use the champion low-mount bracket for the alternator.
My cooling system is supper efficient! I have no doubt that the electric water pump plays a big part in this equation. My car is only street driven (see signature below). Somewhere between 3,000-5,000 miles per year and usually only during the hottest months. And rarely at night. On 90+ degree days, I never fear my car will overheat. I have the pump powered to a switch. But I always leave the switch on. I use the main battery cut-off to power down the car every time I shut the ignition.
Because an electric water pump may/or can blow a fuse without warning or just go off for some other unknown reason, I have programmed some safety measures into the XFI's tune. In every "coolant temperature vs. something" map, I make an attempt to stall the motor after the temperature reaches 185 degrees. This may seem like I'm being a little too careful, but my car's temperature never gets above 172. And that was only a few times on very hot days. So anything after 175, I have to assume that there is a problem that needs to be investigated.
I also installed a big-ass coolant temperature warning light with a 200 degree switch. I only saw this light once, and by that time, the car was drowning in fuel and had no timing left because the XFI was already trying to stall it! Saved my ass...............I forgot to turn on the switch, of course!
It's been 12 years now and this pump has never given me one bit of trouble.