switching to aluminum high flow waterpump, questions...

I bought a flowkooler for my 318 a few years ago. It did give me more flow but didn't seem to help with keeping the car any cooler. The down-side is that there's so much flow that it eats away at the stock timing chain cover behind the water pump and actually eats through it causing a leak in a very short time. I'd stick with a standard pump and fix the radiator instead.