CA18DET Installation 10 - Cooling and air piping rationalisation              Last Updated: 06/10/2008 There are just too damn many pipes around my CA....trying to work out what goes where is a nightmare, I don't even need half of these pipes to run the CA in the 1200, so time to get rid of some of them. First thing to go is the air regulator, the job of this unit it to allow more air bypass the throttle body when the engine is cold, as it warms up this unit closes off....on the race car I say not required. I pulled of the pipes and removed the metal pipe that runs air from the regulator up to the idle control valve Removed the other air regulator pipe, I also had to remove one of the water pipes to the throttle body so I could get to the bolts holding the air reg on. The second air reg bolt involved some serious trickery with a uni joint on the socket - otherwise the thermostat housing would have to have been removed. This water junction pipe now swings free (it's held by the same bolt). I pulled the junction pipe away, exposing the outlet from the water pump that runs all water around the car (besides the radiator). In a normal car is warms the intake air, runs the cars heater, etc... All I want to use it for is cooling the turbo and run the rest straight back into the block.   Remove the other side of the throttle body hose (previous removed the other side of this hose from that junction pipe) This is the main water pipe which manages all the water connections I wont need!     I'm thinking of keeping these two pipes I think they are a simple in and out - it just lines up nicely with the pipe around the back of the block that cools the turbo Also this vacuum line rack seems useless to me it runs to the carbon canister and control all manner of emission control, something that's not a problem for the race car. It also controls when the secondary butterflies open....but I'm going with a more simple method (see below) So here is my simplfied cooling/water pipe system. Comes out above water pump and straight back into the block at the back Two more superfluous water pipes no longer needed My simplified vacuum pipe arrangement - just fuel pressure reg and secondary butterfly control directly from manifold vacuum One more addition to the cooling system is turbo water cooling - I will T piece into the rear elbow to supply water to the turbo Drilled a hole - now just need a welder.... Welded up (thanks Murray!) Fitted to the new cooling system routing Now just 3 Vaccy lines to sort! Clamped up the new cooling system (all it cools is the turbo) I found doing the pipes at the front of the engine first made life a bit easier. First the long, then the connection for front of engine, then rear Blocked of the vaccy lines - just a screw up a short length of vaccy line I think will do the trick...