Well, I had a Pace Chargecooler around the time I had 180bhp. It was not great, so I modified it. I added a second radiator which was a high efficiency motorbike radiator and I piped it all to the boot, where I had a second tank that held about 10 litres (the standard Pace system is around 3 litres from memory), so mine held LOTS more fluid. It still wasn't good at the boost I was running.

Upon removing it and fitting a GRS Intercooler, the difference was like night and day.