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Cooling Discuss all of the aspects of cooling that you can think of! Radiators, transmissions, electric fans, etc.

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Old 09-16-2009, 04:25 PM   #1
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Join Date: Jul 1999
Location: Long Island, NY
Posts: 780
Car: 1987 GTA
Engine: 645hp/656 ft lb Blown 383
Transmission: 700-R4 3,000 stall
Axle/Gears: 3.45

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dual fan amp draw

I have twin electric stock fans in my 87 gta. I wired them together, on a 30a circuit with a relay for ignition on operation. I drove the car for a half hour or so and the fuse blew. What is the amperage draw for the two fans together??? I wired in a fan switch to the manifold on the ground, so that the fans don't run constantly, i'm thinking that will help, but i am still wondering why 2 fans would blow 30a circuit. Hoping withthe fan switch that it won't happen again, but just want to make sure it's safe.
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87 GTA: 645hp/656 ft lbs. at 5300, (tossed blower belt across room). 383 stroker: je pistons, manley rods, chromoly crank, 8.38:1 CR. Vortech V-1 14lbs boost, Vortech carb enclosure, 750 mighty demon, Trickflow 2.02 ported heads. 8 point roll cage (MBRC). Freddy Brown full manual custom 700-R4, 10" converter.
Old motor. Best ET 12.689 @ 109.4 w/ a 1.85 60 on 255 street radials. tranny was slipping real bad, had to pedal it to shift. looking for 10's now.

Last edited by Justin 87 GTA; 09-16-2009 at 04:33 PM.
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Old 09-16-2009, 04:56 PM   #2
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Re: dual fan amp draw

I could be wrong but i thought it was 20A per fan...
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Old 09-16-2009, 07:33 PM   #3
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Re: dual fan amp draw

I tested a set of those fans once and found each fan
motor pulls 7.5A once up to speed,getting up to speed
(first couple seconds)each motor pulled over 20A,so if
you use a seperate fuse of 20-30 for each motor setup
should work fine.
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Old 11-10-2009, 11:25 AM   #4
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Join Date: Jul 1999
Location: Long Island, NY
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Car: 1987 GTA
Engine: 645hp/656 ft lb Blown 383
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Re: dual fan amp draw

its been cold out, but it seems to be working on the switch, doesnt blow fuses now
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Old 11-10-2009, 11:25 AM
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