brushless 1/5 4wd conversion about to begin! couple questions.

[redshift]

That setup is cool florianz!

Seems to me there would be enough heat dissipated thru just some tubing and a tank with just a few ounces capacity however.
The radiator might be overkill as he probably won't be getting a 240 amp ESC white hot, and at $30 for the SIG pump and a few bucks for a small tank is the way to go IMO.

Ryu, you could even run a mix of water and alcohol, for example, for even better heat exchange.