damnit this is the second time i have typed all this it took me 20 mins and pressed post and the damned internet connection had fallen out!! couldnt retrieve the post even in history so here we go again!!
now you must remember im getting old and fragile and have far to many senior moments
but basicaly here is an idiots memory guide to wiring up the i.c fan,
as said i used a aircon switch as it fitted nicely in the dash so looked original, power for the switch came from the live ignition controlled radio wire as it was very close, then ran a wire through the bulkhead and up to the ecu box where i inserted a standard relay in the spare space there, the switch only switches the relay so needs no huge current, then ran a wire from the battery through a standard blade fuse again inserted into the fuse holder so it looks factory fit, to the relay, switched side of the relay ran wire across the front of the car under the fan cover at the front and across to the i.c. side just above the i.c is a rather convenient hole in the inner wing so went down through that to the i.c., then soldered into the original i.c wires,
after making sure the i.c fan worked with this arrangement i then cut the original wres and ran a seperate earth as i was worried about the cooling fans being backfed by the new switched control, this way there was no chance of that happening, this system ran for just over 5 years of almost continuos running (hot here is spain) before the fan motor finally cried enough, replaced it about a month ago whith one from the scrappy which had done no work as it was seized because of the stupid way, vaux controlled it, i.e not being switched on til the engine temp hot almost 100degrees, 5 mins work freed it off, then a ten minute run continously saw it nice and free, I always make a point of switching the i.c. fan on when ever i use the car, to prevent it siezing up again, as the rubber shroud directs all the crap and salt direct onto the fan in the winter its most important!!, ok while you under there you will note the i.c is very close(touching) the wheelarch protector which means there is nowhere for the fan to blow the hot ar out except against the protector!! so a few well chosen drill holes here will help expell the hot air from the i.c!! i started with just ten directly behind the i.c but increased it by a few more later, I could plug tech1 in and drive down the road and watch the inlet emps plummet with the fan switched on and feel the difference in performance!!! strangely enough cos the ecu reads the inlet temps on the early ones like mine, when you are off boost i.e below 1500rpm the ecu see cold temps and increases the fueliing so helps the low down torque!!
so there you have it
hope this helps
Omegatoy
Author
Topic: what figures can i expect with chipping 2.5td (Read 2955 times)