Alot of the guys on the MB forums mount a big tank of ice water in the back of their car. It does work for them but the ice melts real quick. There is also an option of a A/C cooled tank of water called the Killer Chiller. Read-expensive. I'm working with what I have, on a limited budget. The two pumps did help me but I want to drive my highway commute first before I post some results.

Thanks and that would be a really cool test!