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CC Advertisers
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07-03-2004, 05:54 AM
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CC Member
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Join Date: Aug 2001
Location: Melbourne,
vic
Cobra Make, Engine: DRB COBRA, 302W, GT40 manifold, E303 cam, Trickflow alloy heads, supra gearbox, LSD, commodore brakes, Autronic computer. The car was modified by Doug Pearce
Posts: 209
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Not Ranked
themo fans
hey all
l was wondering what peoples thoughts were when setting up themo fans what degrees should it turn on and off?
happy motoring
Alvin
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07-03-2004, 06:12 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,554
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Not Ranked
Alvin,
Mine has settings for 160, 170, and 180. I run it at 180 as my motor makes more horsepower at 210 -220, so I installed a toggle switch to keep the fans off until the temp. gets to around 210. So depending on your motor and how it is built, you may want yours to come on at a lower temp. It seems that a lot of the people around here have theirs at around 175.
Ron
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07-03-2004, 06:31 AM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
I'm currently working on a pendulum switch, it will fit in the brake duct and switch on when you slow down/stop, it switches off when your moving, the wind brakes the connection. Never liked the thermo switches, had a couple go bad.
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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07-03-2004, 06:49 AM
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CC Member
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Join Date: Aug 2001
Location: Melbourne,
vic
Cobra Make, Engine: DRB COBRA, 302W, GT40 manifold, E303 cam, Trickflow alloy heads, supra gearbox, LSD, commodore brakes, Autronic computer. The car was modified by Doug Pearce
Posts: 209
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Not Ranked
l forgot to mention that lm runnings autronics computer it switchs it on and off l was just wondering what the temp set at
in C not F
alvin
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07-03-2004, 07:20 PM
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CC Member
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Join Date: Nov 1999
Location: Brisbane, Australia,
Q
Cobra Make, Engine: Contemporary CCX3117 427FE
Posts: 4,381
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Not Ranked
http://www.arkansasrunner.com/calculators/tempconv.htm
My thermostat opens at 180F, and the fans come on at 190F. On winter mornings, the fans don't come on at all as the water in the radiator comes into the motor at about 150F. The guage just keeps moving from 150 to 180 and back as the thermostat opens and closes.
__________________
Craig
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07-03-2004, 09:05 PM
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CC Member
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Join Date: Jul 2003
Location: Noble Park,
Vic
Cobra Make, Engine: RMC, 302Windsor HO Stock
Posts: 78
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Not Ranked
Pendulum switch
Maybe you could include some style of mercury switch rather than a pendulum. Then all the workings are enclosed.
Another idea could be a gearbox switch on first gear (like the reverse to tail lights) then when you slip into first the fan kicks on!!! 
Quote:
Originally posted by 427 S/O
I'm currently working on a pendulum switch, it will fit in the brake duct and switch on when you slow down/stop, it switches off when your moving, the wind brakes the connection. Never liked the thermo switches, had a couple go bad.
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__________________
Please have some sympathy for the HP challenged
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07-03-2004, 09:36 PM
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Senior Club Cobra Member
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Join Date: Sep 2002
Location: Montgomery,
TX
Cobra Make, Engine: CR 427 S/C, 351W, 5 Sp & KMP142 - 427 SO, 4 Spd
Posts: 2,212
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Not Ranked
I have my fan wired to a toggle switch. The only
time my Cobra starts getting close to 200 is if I
am at a light or in slow traffic - at which time I
just turn it on and it drops it to 170-180. Now
I just turn it on if I know I'm going to be sitting
at lights a bit and turn it off when I hit the freeway.
I'm used to watching gauges from flying so that's no
problem. Kiss.
Flip
__________________
Flip
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07-04-2004, 04:04 AM
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CC Member
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Join Date: Jul 2001
Location: Sydney, NSW Australia,
nsw
Cobra Make, Engine: Classic Revival, LS1, T56.
Posts: 165
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Not Ranked
Mine comes on about 180. Not sure if it is good or bad, but at least she don't cook!!
I hate engines that overheat. Must be a hangover from my Datsun Bluebird days.....
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07-04-2004, 04:38 AM
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CC Member
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Join Date: Aug 2001
Location: Melbourne,
vic
Cobra Make, Engine: DRB COBRA, 302W, GT40 manifold, E303 cam, Trickflow alloy heads, supra gearbox, LSD, commodore brakes, Autronic computer. The car was modified by Doug Pearce
Posts: 209
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Not Ranked
sloth try the datsun 1600 days with a sr20 turbo!!!!!
is that about 80 c temp????
Alvin
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07-04-2004, 06:10 AM
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CC Member
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Join Date: Jan 2001
Location: Sunbury,
VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
Posts: 5,391
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Not Ranked
I agree with Craig. Get the ECU to kick the fans in at about 85C.
With a 75- 80 degree thermostat your engine temps on the move will be below the point where the fans will come on. They should only start up in traffic when there isn't enough airflow.
Cheers
__________________
Mike Murphy
Melbourne Australia
Last edited by Aussie Mike; 07-04-2004 at 06:13 AM..
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07-06-2004, 03:16 PM
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CC Member
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Join Date: Aug 2001
Location: Melbourne,
vic
Cobra Make, Engine: DRB COBRA, 302W, GT40 manifold, E303 cam, Trickflow alloy heads, supra gearbox, LSD, commodore brakes, Autronic computer. The car was modified by Doug Pearce
Posts: 209
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Not Ranked
thanks for everyones input it has been a great help
alvin
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