[Boli]

OK.. if you arn't cooling that second loop with a separate radiator... you are basically just going to see the loop as if you had added X litres of water to the loop and second pump... i.e. it isn't going to make much difference in the overall picture.

This is what I would recomend: (providing the ID of the tubing is the same mind)

- mod it so the water flows through the radiator through both circuits (making that a quad pass rad?!?!

OR

- use it two cool separte computers, as a spacesaving idea.

Unless you get these sort for free/on the cheap it would be better for anyone just to get a normal large HC... or two HC depending what takes their fancy.