Ok, first thing's first. The water supply hoses to the turbos aren't super fun to replace, that being said, I am glad it was the hose and not the turbo. Second, do NOT leave a car that has a slight engine oil leak on jack stands at an angle for a week cause oil will pool and take a helluva long time (and stink) to burn off. Thirdly Electric cooling fans are so much better then the clutch fan on Twin turbo Zs. I was able to install such a fan ( a flex-a-lite 150) in about 1.5 hours.

Now, the reasons I say this is better then the clutch fan, and feel free to disagree with me are; I believe it will extend the life of your water pump or at the very least keep it from premature failure. I had a Nissan 120k kit water pump fail on me in less then 5k miles due in a large part to a slightly unbalanced load cuased by the clutch fan.

I am not saying that everyone should run out and change thier clutch fan to electric fans but if your clutch fan assembly starts binding up or continually slips you might want to look into it. I got the fan for 188$ came as a kit and it was easy to install.

+ and - went directly to the battery, a wire spliced into the A/C wire and 1 wire went to the ACC (ignition powered circuit) so the fan wouldn't run when the car was off. I am going to put in a 5 min timer so the fan will run for 5 min after i shut down the car, kind of a poor mans turbo timer for extra cooling but other than that its all done and ready to hit the road in 1.5 hours.

When the fan comes on its pretty quiet, difficult to hear when traveling down the road due to road noise but at idle or when the A/C is on its noticable but still quieter then the clutch fan. The car should heat up a little faster in the winter too. Fan does not come on at all highway driving ( I will let everyone know if it makes a difference in gas milage)

The only problem one might have is the clearance between the fan and the front of the engine. I have a Koyo Double core aluminum radiator and its pretty thick and with the electric fan attached to it i have about 2 inches of clearance. I would say this is the minimum you want to have due to engine movement from heavy breaking and downshifting or accelerating. Engines move and they need space to do it so you have to give them a bit of room. I am pretty sure Flex-a-lite makes a thinner fan and there are other brands out thier that I am sure work just as well. if you have aftermarket underdrive pullys or a thick radiator you might want to get measurments before purchase.

 

what kind of timer would you use and how?? good idea... I'd do it on my NA just cause....

 

The way you would use it would be to connect it inline with the ingition on circuit. Set it for however long you want and the relay will be active as soon as you turn on your car and stay active +the time you set it for.

for instance you would connect power to the relay board from the battery to power the circuit (this is for when the car is actually off) it will take place of the ignition power while the timer counts down.

the imput that will "arm" the relay is the same thing you would use to turn the fan on during normal driving operations.(ingnition power)

If you wanted to get a little more fancy you could take the power lead for the relay board and put a switch on it so you can activate or deactivate the timer just make sure the default position for the relay with power off to the board is closed. ( so you don't inadvertantly leave the fan off under normal driving operations. )

i'd mount the board up near the battery for ease of wiring and to keep it warm and safe.


http://www.hometech.com/brains/timers.html