Re: wiring in electric fans
[Re: Sinitro]
#3143567
05/10/23 05:11 AM
05/10/23 05:11 AM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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One crucial point to keep in mind when wiring add-on electric fans.. Since they draw large amounts of current (>30 amps) do NOT use the bulkhead connectors, as it exceeds their handling capabilty.. Just my $0.02.... Yes, but STILL if bulkhead terminals are kept as the main path there is allmost nothing to worry if wired into the CORRECT alt output rate. Just when engine is off, and when this happen as mentioned if you set them up to be on JUST with ign switch on… and if to be automatically off with temo sensor switch, fans will be working for a minute or even less. Still on this stage, bulkhead will hold it nicelly. Take in mind, RELAYS are made with prongs allmost just like the packard terminals, and they handle the load! But sure, when installing those, they are fresh brass… but bulkhead terminals… not. Check and MANTENIENCE is the key Over the years, we have rebuilt multiple Mopars and wiring systems which were modified by less experienced guys for electric fans... Bulkhead connectors and associated OE wires were not designed to handle the high current. Since we have designed & built multiple vehicles for CES and SEMA shows we do know a little bit about this.. Just my $0.02... Sure, it happens… making it wrong sure takes to that scenario. And without considering the correct loads handled on every spot at certain stages.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: Cab_Burge]
#3143568
05/10/23 05:25 AM
05/10/23 05:25 AM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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[ He still needs to check his current draw and charging capacity I installed one large aftermarket electric fan on a drag only car years ago and found that it would draw 70+ amps on startup initially To much amp draw can melt overloaded, to small, wires real quickly I guess it got a 8 gauge wire or so to source it? LOL. Most fans are wired into 14-16 gauge wire rate. Sure the start up instant would require thicker wire if the load for it was constant, but the start up high peaks are not larger than 1/4 of second or so, then the decay is abrupt once the fan stopped inertia is beaten
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NITROUSN]
#3143676
05/10/23 02:35 PM
05/10/23 02:35 PM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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You are not understanding.
NOT WITH AMMETER EQUIPPED CARS,
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NachoRT74]
#3143682
05/10/23 02:59 PM
05/10/23 02:59 PM
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Joined: Jan 2003
Posts: 18,432 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
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You are not understanding.
NOT WITH AMMETER EQUIPPED CARS, I fully understand. I would bypass the ammeter and install a voltmeter. I would also install a fused larger gauge wire at the alternator to either a buss terminal, relay stud or battery, large enough to support the alternators maximum output.
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Re: wiring in electric fans
[Re: NITROUSN]
#3143822
05/11/23 02:03 AM
05/11/23 02:03 AM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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Thats a DIFFERENT STUFF. All my explanation is based on cars still with ammeters in working order and also explaining how ammeter can be kept in place still with upgrades and safe.
The installation you posted is exactly the kind one which, on stock setup, acelerated the bulkhead burning process along the years and get ammeters out of their limits, being constantly stressed.
Now, bypassing ammeter and bulkhead at the same time with the tipical batt/alt jumper wire is, as told by John is a matter of prefferences, but even this must be made on the right way.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NachoRT74]
#3143864
05/11/23 09:32 AM
05/11/23 09:32 AM
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Joined: Jan 2003
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NITROUSN
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Thats a DIFFERENT STUFF. All my explanation is based on cars still with ammeters in working order and also explaining how ammeter can be kept in place still with upgrades and safe.
The installation you posted is exactly the kind one which, on stock setup, acelerated the bulkhead burning process along the years and get ammeters out of their limits, being constantly stressed.
Now, bypassing ammeter and bulkhead at the same time with the tipical batt/alt jumper wire is, as told by John is a matter of prefferences, but even this must be made on the right way. What happens when you are 50 miles from home and the alternator quits. Where does the load go then?
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Re: wiring in electric fans
[Re: NITROUSN]
#3143920
05/11/23 01:32 PM
05/11/23 01:32 PM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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It comes from batt to feed fan, ammeter will show discharge. Sure, bulkhead and ammeter will get the fan loads.
Are we assuming the fan is replacing the stock fan clutch? Or being added to reinforce it?
But if alt quits the right thing is take the car appart and wait for tow, just like if brakes fail or Ign module.
In any case, that’s the exception, not the rule. If we think on every “WHAT IF” posible then don’t try to live.
You can also disconect the fan, and drive back home. Just 50 miles.
Also, if you think on every “what if” well, the same than get small spare parts on trunk, a piece of wire to jump out batt and alt and bypass the amm and bulkhead.
If you are driving at night, lights also will be affected, then the ammeter too.
Alt can fail also with belt broken… which is maybe easier than an alt fail itself.
What about if fan fails?
P.S.: That’s why I’m fan of the stock fan clutch.
Last edited by NachoRT74; 05/11/23 01:34 PM.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NachoRT74]
#3143939
05/11/23 02:49 PM
05/11/23 02:49 PM
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Joined: Jan 2003
Posts: 26,538 Rio Linda, CA
John_Kunkel
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What about if fan fails?
P.S.: That’s why I’m fan of the stock fan clutch.
How many modern cars have an engine-driven fan?
The INTERNET, the MISinformation superhighway
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Re: wiring in electric fans
[Re: John_Kunkel]
#3144296
05/13/23 02:57 AM
05/13/23 02:57 AM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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What about if fan fails?
P.S.: That’s why I’m fan of the stock fan clutch.
How many modern cars have an engine-driven fan? John, how many cars still have carburetors? How many got ammeters? How many have a single coil or even a distributor? That premise doesn’t have sense my friend about the cars we are talking and working.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NachoRT74]
#3144392
05/13/23 02:03 PM
05/13/23 02:03 PM
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Joined: Jan 2003
Posts: 26,538 Rio Linda, CA
John_Kunkel
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But it does reply to the question "what about if the fan fails". The same as if your fan belt breaks, s**t happens and that's no reason to reject a modern upgrade.
The INTERNET, the MISinformation superhighway
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Re: wiring in electric fans
[Re: John_Kunkel]
#3144424
05/13/23 05:25 PM
05/13/23 05:25 PM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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Well, yes… but at the end is cheaper and easier to replace the belt than the fan LOL. And you can get a spare on trunk
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: wiring in electric fans
[Re: NachoRT74]
#3144437
05/13/23 07:06 PM
05/13/23 07:06 PM
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Joined: May 2019
Posts: 6,511 nowhere
Sniper
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Well, yes… but at the end is cheaper and easier to replace the belt than the fan LOL. And you can get a spare on trunk Yes, because OEM electric fans have such a failure rate that it is an issue If you use a non OEM style fan, well you take your chances. I put an electric fan on my 51 Plymouth. Several reasons why. I watched an engine masters dyno test where the fixed style fan my 51 had used approximately 30 hp to run, on a 97 hp (when new, lol) engine. So that was a cheap and easy 30+% increase in HP to the wheel. Not to mention it's quieter and fuel economy improved without that fixed fan running all the time.
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Re: wiring in electric fans
[Re: Stanton]
#3144500
05/14/23 02:45 AM
05/14/23 02:45 AM
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Joined: Aug 2007
Posts: 6,109 Valencia, España
NachoRT74
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Guys, I just said and fan of the stock fan clutch, not saying anything againts the electric fans LOL.
About what I’m not agree is getting the power to the fans from battery without take in mind you have an ammeter, which is a wrong procedement. This is the deal on the thread. Aside the alternator must be upgraded accordingly for it/them.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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