From: owner-perf-list-digest ford-trucks.com (perf-list-digest)
To: perf-list-digest ford-trucks.com
Subject: perf-list-digest V2 #165
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perf-list-digest Monday, July 5 1999 Volume 02 : Number 165



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Ford Truck Enthusiasts - Performance
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In this issue:

FTE Perf - Great Parts Site
FTE Perf - Electrical - Help!
Re: FTE Perf - Electrical - Help!
Re: FTE Perf - Electrical - Help!

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Date: Sun, 04 Jul 1999 15:07:05 -0400
From: William A Whited
Subject: FTE Perf - Great Parts Site

Hey, www.wrenchead.com lets you search for parts
without having to know the part number. It's very
similar to the computers most of the part stores use:
year; make; model; engine; so forth and so on.

- --
William A Whited
74 F100 RANGER SUPERCAB 390
77 F100 CUSTOM FLAIRSIDE 302
79 F100 EXPLORER SUPERCAB 302 (PARTS TRUCK)
"IT DON'T GTMO BETTER THEN THIS, SEMPER FI"


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Date: Sun, 04 Jul 1999 16:41:09 -0700
From: George Miller
Subject: FTE Perf - Electrical - Help!

I upgraded my three cooling fans, now a total draw of 27 amps. I have
them hooked into the accessory side of the ignition switch and that
popped the 15 amp bayonet fuse. A 25 amp fuse allowed everything to
operate but now I can hear a noticeable drop in my stereo and A/C when I
engage the fans. I have individual 20 amp line fuses on the fans. The
A/C is on a different circuit, so that really confuses me. I hope maybe
some of you Sparks out there can help clear my non electrical mind:

Will I eventually fry something using the 25 amp fuse?

Have I exceeded the capacity of my 80 amp alternator?

Should I wire the fans directly to a battery circuit and bypass the fuse
box?

Any help would be greatly appreciated.

TIA

George Miller
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Date: Sun, 04 Jul 1999 20:57:56 -0400
From: "Thomas J. Teixeira"
Subject: Re: FTE Perf - Electrical - Help!

At 04:41 PM 7/4/1999 -0700, George Miller wrote:
>I upgraded my three cooling fans, now a total draw of 27 amps. I have
>them hooked into the accessory side of the ignition switch and that
>popped the 15 amp bayonet fuse. A 25 amp fuse allowed everything to
>operate but now I can hear a noticeable drop in my stereo and A/C when I
>engage the fans. I have individual 20 amp line fuses on the fans. The
>A/C is on a different circuit, so that really confuses me. I hope maybe
>some of you Sparks out there can help clear my non electrical mind:
>
>Will I eventually fry something using the 25 amp fuse?

If you just put in a 25 amp fuse instead of a 15 amp, you're probably
overloading some wires in the fuse block and maybe elsewhere. If this is
true, you will eventually cook those wires and possibly catch the fuse
block on fire.

>Have I exceeded the capacity of my 80 amp alternator?

I don't know what else you have, but that seems possible. The fact that
everything else goes dim when the fans are on indicates that the alternator
isn't quite keeping up.

If you do put a higher current alternator in, make sure the rest of the
wiring is up to it.

>Should I wire the fans directly to a battery circuit and bypass the fuse
>box?

That would be better than what you're doing now. Have the in line fuses as
close to the battery/alternator as possible. If you do put in a bigger
alternator, wiring the fans separately will prevent you from overloading
the existing wiring.

>Any help would be greatly appreciated.
>
>TIA
>
>George Miller

Tom Teixeira mailto:tjt world.std.com
94 Taurus SHO 5-speed NESHOC/SHO Registry
'66 Mustang convertible (200 cid auto) http://www.ford-trucks.com//lc/lc.php?action=do&link=http://world.std.com/~tjt
'35 Ford Pickup (flathead V8)


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Date: Mon, 5 Jul 1999 00:16:09 EDT
From: FLR150 AOL.COM
Subject: Re: FTE Perf - Electrical - Help!

George,
First of all wire those fans through a 30-45 amp relay, that will help with
the power drop. Second, yes you are probably close to the maximum draw for
the smallish 80 amp alternator. If you do hook direct to the battery,
although I wouldn't recommend it, make sure you use a relay, and either some
kind of temp sensors to turn the fans on and off, or keep it hooked to the
aux side of your key switch, that way you will have a harder time killing off
the reserve power in the battery and so that you don't forget to turn them
off (if you don't use the temp switches). I am not implying ignorance, I
myself have to come out to a dead battery on an old hot rod because I left
the fans running.
Hope I have helped,
Wayne Foy
'94 Flareside SC
Wayne's Page
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End of perf-list-digest V2 #165
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