Mike,

At one time I was much younger. In those days, I was planning to turbocharge
the Vanagon diesel. I didn't want to tear down the engine to add oil
squirters, etc, etc. So I researched the cooling system question. (we're
talking somewhere around 1987) I found the Evans system, contacted them and
was very impressed. At their installation, I did a series of thermal images
(HgCdTe camera no less) of a turbocharged VW 1.8L 8V engine being run out on
a dyno. The thermal uniformity of the head was amazing (less than 2 degrees
as I recall). In another area, I mapped another turbo VW pulling less boost
and putting out less power, water/ethylene glycol cooled. Hot spots
everywhere. Moved around with rpm and load, but thermal variations were well
over 20 degrees (most we could map in an image then).

I designed a system with them, and was ready to go. Had an IC reliability
crisis on one of the major deep space missions and the summer was gone before
I blinked. I resurrected the ideas when I did the Gasoline I-4 conversion.
But never quite needed the pushup. I was thinking about it again with the
Audi Turbo 3A engine, but more power will surely trash the transmission.

Its a superb system, now race proven, and probably a good WBX enhancement.
Thermal uniformity in the head -- good. Hot spots - bad.

I'll try to find my notes and drawings again. The key was the location of the
leveling reservoir. I was going to put it in the rear wall, passenger side,
where later models put the rear wiper washer tank.