going electric fan?

how much was that centech controller... id like to be able to control when it turns on. i dont like how it doesnt turn on till 185 or whatever the setting is set at.

Cheap fix is wire it up for key on operation. I had my S15 wired like that and never had a prob in 4 or 5 years.

Is it ok to run it constantly on so when I turn the ignition to the "On Position" it is constantly on?

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I never had a problem with this method.

No reason to run it while the vechicle is in motion, just going to wear the bearing out prematurly! Not to mendtion the current draw,

I don't see current draw, while the vehicle is running(alternator is charging) as a valid negative point. Wear perhaps, current draw whilst in motion, not so much.

The only resron you do not want the fan to come on immediately is because the engine runs it's best at a certain temp. range, hence the use of a thermestat to regulate the flow of coolant. When you get in your truck, crank it up and start heading out, you want the motor to get up to operating temperature as quickly as poosible so that it is running like it was designed to. It won't HURT anything, but I still put an adjustable thermostat on all electric fan installs so I can properly adjust it. I crank it up, watch the temp guage and when it reaches the normal operating temp, I turn the adjuster until the fan kicks on and leave it. Sometimes in the winterm I would bump it down a bit. Advance or Autozone has adjustable switches for around $30-40.

i was looking into doing this too but the fans are kinda expensive. i was looking at flex-a-lite fans (which was probably my problem) and they had a kit for the thermostat that was a prod type that you just stuck between a radiator fin. it was also adjustable but dont know how reliable or accurate they are.

I origanly got a flex-a-lite , it had clearance issures on my 88 2wd. The Spal,sits very tight to the radiator!