Hello,

 

I have changed my standard radiator to after market hi-flow rad.

Question is - do i keep original viscous fan (from water pump) or thin fan which came with radiator? (same as in pic).

 

After market one is on electric wiring, where do i connect him? Is he going to be constantly on?

 

The Viscous Fan pushes far more Air than the Electric fan ever can, and controls its speed dependent on Temp.

 

An electric setup can do an adequate job, but most do not. It Requires a very high flow fan setup with electronic temp/speed control.

So it's better to stick with OEM Viscous Fan? its just its too noisy + bulky...

And how do i wire electric fan? How do i make it temp controlled?

My preference is always the viscous, for the simple reason that if the electric fan fails, it'll stop all together, because either the motor will be fried, or the wires get cut/melt, or a loose connection etc. The viscous fan shouldn't fail and if it does, it usually fails in the sense that the viscous unit, which tightens up and loosens off with heat will normally fail in the "ON" position, so your fan will be running overtime, which is acceptable, where as it stopping altogether is not. Provided you keep a close eye on the fan belt with a viscous fan there is less chance of your engine getting too hot and going pop :D

Cheers HollowPoint for info, then i will keep OEM fan ... btw i was told you have rear bootlid with glass for sale? (for SWB) ;)

Cheers HollowPoint for info, then i will keep OEM fan ... btw i was told you have rear bootlid with glass for sale? (for SWB) ;)

 

Don't think its from a SWB to be honest.

 

Ask JeffTT from Zedworld, they've just got a new SWB slickie in for breaking - I'm sure they could help.

So it's better to stick with OEM Viscous Fan? its just its too noisy + bulky...

And how do i wire electric fan? How do i make it temp controlled?

 

Viscous fans when working correctly can be very good, however 20 year old clutch units and driven by a belt and always running often results in poor performance without the driver knowing and overheating can occur.

Look bulky and do take up room, seldom used on modern cars.

 

Electric fans look neater, only used when required and can be effective if using a decent one with a high flow rate.

Most common used type of fan in modern cars now.

 

If going electric, ensure a good quality brand like spal with a high flow rate and a temp sensitive fitting kit, the sensor goes in either the top rad pipe or the top metal alloy pipe to engine ( your choice) the ideal running temp of a Zed engine is 78-82 degrees, so a cut in point of 84 degrees is okay.

For the worrying or just as a safety feature, Fit an override switch in the cabin should the sensor not activate the fan. Ensure you use a decent aftermarket water temp gauge (stock is crap anyway) using a gauge with a warning light set to your temp is best.

 

You'll be taking a tiny bit of drain off the engine, getting rid of something unsigthly and creating a bit more room.

Finally do not get rid of the electric sub fan in front of the rad, though it kicks in quite late, it is better than nothing and also acts as a back up telling you another fault is within the engine.

hth

smithy