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Location:
Hornsby, N.S.W
Registered:
September 2002
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engine fan "VS" thermo (electric)
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Thu, 04 November 2004 07:39
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has anyone proven 1,2,or 3 kilowatts by replacing the engine fan with a thermo (electric.
I have tested an electric 12" fan, it has a current draw of 5.5amps, so is it worth removing the engine fan to then put the extra load on the altinator to run an electric fan??????????
thanks
Justin
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 07:41
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When on, there is no way a set of thermos is going to use less power than an engine one provided they work as well. That said, the advantage of thermos is that they aren't always on.
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Location:
c'town, NSW
Registered:
May 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 07:45
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the good thing about the leccy fans is that they dont run all the time
on an efficient setup the electric fan should only really need to run sitting in traffic. Fan on sitting in traffic doesnt sap engine power and u dont need to go anywhere.
the toyota mechanical fans when working properly shouldnt be engaged all of the time but there is still some resistance.
i remember ed having a bodgy mechanical fan on his 7M-GE, it wouldnt cool as it was old and rooted so he rigged it to be engaged 100% all of the time. the car turned into a complete pig as it had to fight this fan all the way thru to 7000rpm.
0.02c
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 07:53
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the thing with mechanical fans is.... as speed goes up, the power required to turn them increases by the square of RPM (or something like that  ie non-linear)
if your motor only turn to 4000, maybe it's not such an issue, but if it turns at 8000rpm.... at then one of the metal blades flies off and punctures your battery.... you start to appreciate elec fans
basically, elec fans are at best advatage against an engine fan that has a solid centre and is attached to a high revving motor.
a vicsous coupled fan will slip when the motor is spinning fast, and reduces the mechanical losses...
if i had a choice, and revved to maybe.. 7000rpm.. (and i had the space) i'd go with a viscous coupled engine fan...
if i was tight for space, or couldn't get a slippery centre fan in there, i'd use electric..
never using solid (metal) fans again
Cya, Stewart
ps, oh as for power gain, i noticed a large improvement, both in rate of engine revving, and also more power at top end.. but never dynoed it way back then..
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 08:02
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thanks for your replys guys, looks as though the leccy fans are a go! i personally think they are better looking and as stated above you dont need them constantly running
Cheers
justin
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 08:29
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What motor is it?
The 12" you have will only have enough capacity to cool a 4 or a small 6.
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 09:12
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4 cylinder (20v)
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Toymods member
I supported Toymods
Location:
Rydalmere, NSW
Registered:
May 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 11:39
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I got a 12V elec fan replacing the standard viscous centre fan (because the turbo would hit it if I kept it in there). When you turn the key to IGN, the fan comes on straight away, in other words it's routed to run full-time. How do I get this sorted out so it ran only when needed like before? A relay or something simple like that again?
Sorry to thread-hijack... 
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Location:
Perth
Registered:
August 2004
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 13:00
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| RAV-GT4 wrote on Thu, 04 November 2004 22:39 |
I got a 12V elec fan replacing the standard viscous centre fan (because the turbo would hit it if I kept it in there). When you turn the key to IGN, the fan comes on straight away, in other words it's routed to run full-time. How do I get this sorted out so it ran only when needed like before? A relay or something simple like that again?
Sorry to thread-hijack...
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You can just buy a thermostat kit... It is just a temperature switch with a brass sensor you tap into your radiator hose...
Connect it to the fan and to 12v (either live or ignition depending on how you want it to run). Get your car to normal operating temperature and turn the knob until your fan starts...
Thats it!!!
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Membership Secretary
Location:
Sydney
Registered:
June 2002
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 13:33
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Repc make a switch just like this andrew, I have one in the wagon paid like $40 I think.
A bulb just sits in te top hose. You adjust when you want the thing t ocome on.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: engine fan "VS" thermo (electric)
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Thu, 04 November 2004 14:01
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or you could just use the stock one.. it grounds (usually) when the temp reaches when the fan turns on, so you provide power to the relays switching coil, and then ground it thru the temp switch...
check out a wiring diagram..
if yours doesn't work that way, you could grab a switch from an Ae82 or similar...
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