Created Sep 07, Modified Oct 07

Well initially I wasn't exactly impressed. Although intake temperatures were down on the std unit under boost conditions the idle temperature was shocking. It would rocket to 45-50degC in very little time and just hold there. Admittedly holding the revs at 1200rpm would pull the temps back down to high 30's but it wasn't exactly what I was expecting nor was it anything like I had read on the forums. So looking at the weedy water pump with suspicion I borrowed a Bosch unit from someone who was getting ready to fit their chargecooler system.

In the meantime I had wired up a thermocouple into a mk1.5 that was running the ST185 chargecooler and this was yielding some impressive results. His intake temperature was low 20's while running on the motorway and under boost rose slowly to low 30degC. This was what I was expecting on mine. In traffic temperatures rose to about 30degC. His pump was a fair bit bigger than mine so I was hopeful for the Bosch unit to be the answer.

So we tried the Bosch unit and it was better but not the Holy Grail answer I was looking for. So I bit the bullet and ordered to ST205 water pump and hoped that would be the end of the issues. After fitting the simply huge Celica pump I went off and did some testing almost at the exact moment the thermocouple decided it had had enough! Grrrr. Managed to get that fixed and the results were..... different. My initial results were fantastic but I suspected the probe was not in the correct place. Dyno testing confirmed that one sure enough and revealed the chargecooler is not giving the results expected. I've redone one pipe that had a kink but I'm souring some flexible piping to enable us to move the pump into the engine bay. That and I may fit a variable speed controlled too. Remind me why I started modding my car?