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How Important Are Thermo Fans?

Matthew Squarepants
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Matthew Squarepants Explorer

Matthew Squarepants

Posted
Posted

Hey guys,

Changing my radiator this week and was wondering how important are thermo fans? Do you need to get them, or could I just change the radiator without them?

Car is a R34 GTT 220kw daily driven for now although I plan to take it to the track in the future sometime.

Any help will be appreciated.

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https://www.sau.com.au/forums/topic/443305-how-important-are-thermo-fans/
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GTRPSI Mentor

GTRPSI

Posted
Posted

You mean electric fans, instead of clutch fans.

Many here will tell you the clutch fan works better, flows more air than the electric thermo fans.

There was a thread about it a while back....

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Matthew Squarepants Explorer

Matthew Squarepants

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Posted

So it'll be alright just to change the radiator to an aftermarket one while keeping the factory fan with shrouds and everything else, yes?

Just have a bunch of car guys at work saying I need to buy thermos when changing to aftermarket radiator... Then have other guys telling me I don't :P

75coupe Grand Master

75coupe

Posted
Posted

Is you existing radiator stuffed?

Is your car overheating from radiator problems?

Has the radiator got a leak?

If the answer is no why change it?

Im still running the original radiator with no issues and have modified pretty much everything except motor internals...

But yeah from others experiences std clutch fan works best

Matthew Squarepants Explorer

Matthew Squarepants

Posted
  • Author
Posted

Yes radiator is stuffed! Was going to source out a cheap oem radiator until I found a good deal on a brand new Koyo rad I couldn't pass up. He's also selling thermos for an extra $50 and insists on me buying them. So I was asking around for advice and decided I'm going to stick with the clutch fan.

Thanks for the help guys.

jjman Mentor

jjman

Posted
Posted

no clutch fan, running thermos works fine :)

if your new rad is too thick and you can't run the clutch fan, get 'S' bladed fans as they work heaps better then straight ones

when I was doing my research on thermofans it was said that straight blades are better, just noisier. (sblades have less surface area at the tips where the most velocity is and air moving potential).

Can you clarify this?

mic087 Community Regular

mic087

Posted
Posted

Yes radiator is stuffed! Was going to source out a cheap oem radiator until I found a good deal on a brand new Koyo rad I couldn't pass up. He's also selling thermos for an extra $50 and insists on me buying them. So I was asking around for advice and decided I'm going to stick with the clutch fan.

Thanks for the help guys.

Be sure to measure and make sure it will fit in with your standard clutch fan...

If not I would grab the offer now @ $50 extra for thermo fans... most thermos fan kits with an aluminimum shroud for an R33 go for about $100 on ebay

89CAL Grand Master

89CAL

Posted
Posted

when I was doing my research on thermofans it was said that straight blades are better, just noisier. (sblades have less surface area at the tips where the most velocity is and air moving potential).

Can you clarify this?

Sounds about right, this is worth a read

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