TD5 viscous v electric, who's done it. what are the options?

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Originally Posted by manic

Mick, are you talking about the ac condender fans? They only come on with AC or if your motor is overheating. Basically without AC on, those fans shouldnt be required. Was your radiator blocked up by any chance?

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Yes, that's them. Couldn't run the air-con without them. They didn't like the water, although the air con was off for crossings. Radiator was new.

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Originally Posted by Tombie

Manic - and you don’t think I’ve had these experiences?
Tried and tested these types of device to see what happens?

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I've not disagreed with the general consensus in this thread. I'm interested to hear of any experience with e.fans on a TD5, including yours, how far you took it, etc. And whilst the e.fan mod is not advised for a number of valid reasons, someone may still have an angle on it. Discussing ways in which it could be attempted, after considering the experiences of others, makes for interesting conversation - I think.

The contributions in this thread have convinced me that simply removing the belt-fan and bolting an off the shelf efan kit to a TD5 is not going to be good enough. But if the challenge was set, might someone come up with something that works, or would you say it is entirely impossible?

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Originally Posted by manic

I've not disagreed with the general consensus in this thread. I'm interested to hear of any experience with e.fans on a TD5, including yours, how far you took it, etc. And whilst the e.fan mod is not advised for a number of valid reasons, someone may still have an angle on it. Discussing ways in which it could be attempted, after considering the experiences of others, makes for interesting conversation - I think.

The contributions in this thread have convinced me that simply removing the belt-fan and bolting an off the shelf efan kit to a TD5 is not going to be good enough. But if the challenge was set, might someone come up with something that works, or would you say it is entirely impossible?

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I don't think that anyone has said it is impossible.
many have said it is unnecessary (myself included) Then you have to think about is it economically viable and is it actually worthwhile going to the expense and effort in the first place.

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Originally Posted by manic

But if the challenge was set, might someone come up with something that works, or would you say it is entirely impossible?

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It would be technically possible. Economically horrendous though.

You’d also need to step up at the front with push fans on the IC and Condenser that were far stronger than currently there.

Add a control system - something tied into boost, inlet temp etc and you’d potentially have something.

I didnt take pics but the biggest rusian 600W fan had blades and dimension quite similar with the viscous and i addapted it to the original housing but even then it couldn't cool enough, IMO at least 1000W motor is needed which is not a valid option for me whatsoever... IMO if somebody thinks that a 250W e-fan can substitute the viscous unit is let's say "naive"

Tombie reckons the belt fan pulls outaround 5000 cfm on the revs. *Not sure if thats measured or calculated but sounds about right

A 600w efan pulls around 50amps which should translate to roughly 5000cfm. So you gotta wonder why it didnt work!

I would expect 1000w would be around 8000cfm!!

I can't understand how you can convert 600W electric power to cfm as long as the number, dimensions, shape of blades and the rpm of the motor are all unknown ... it seems simply impossible to me, what i know is what i experienced and based on that i wouldn't fit again an electric fan instead of the viscous whatsoever

True, all those factors plus positioning and shroud will effect actual cfm pulled through the radiator.

I wrote 600w 'should' be able to pull ~5000cfm. But as you found out, getting that through the radiator is less likely. I have no idea what your 600w fan was pulling, although im interested to know more about it - what size was it, russian you say?

Any one with an airflow meter care to take some measurements right infront of the radiator at various rpms with the fan clutch locked? Or has that already been done?