Author Topic: Electric Fans  (Read 217 times)

roadking77

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Electric Fans
« on: April 10, 2021, 07:19:58 AM »
Im most likely going to get a cold case radiator at Carlisle in a couple of weeks. They have an electric fan set up for the second gen as well. Have been going back and forth if I want to go that route. Im looking for a good reason NOT to (I know the cold case guys will tell me why I should).

I am a stock from factory type of guy with cars, however after seeing some reviews and hearing from a couple of guys on here the Cold Case can be installed and not change the overall looks that much.

I had cooling issues originally with my 77 but that was something to do with a 'flex plate' or something in the water pump. Once that was resolved I havent had any problems at all. I had my original radiator cleaned and checked from an old school radiator guy. This tells me as stock it will work. I do have the original radiator for the 79, but I would have to have it cleaned and checked as well for peace of mind at a cost of $150+- , thus my reasoning of putting that money towards a new one.

As far as the electric fan set up, my biggest concern is the change of looks in the engine bay, but if the benefit out weighs that than im all for it.

SO, what is the biggest advantage of using electric?  And is it a relatively easy hook up, by that I mean do I need to rewire the dash? buy an additional $500 worth of controls? etc. etc.
Finished!
77 T/A - I will Call this one DONE!
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79 TATA - Lost to Fire!
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85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
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5th T/A

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Re: Electric Fans
« Reply #1 on: April 10, 2021, 07:48:20 AM »
Kerry,

I installed a Cold Case radiator, for the time being I have elected to stay with the factory shroud and clutch fan. There are pros and cons of both types of fans.

Stock fan setup is simple and looks original.

Electric fans are definitely better for hot climates if you do a lot of low speed bumper to bumper driving. They move a maximum amount of air regardless of engine RPM. If you have a dual fan setup you can stage them, one fan on at a lower engine temp, both fans on as the temperature rises or AC is turned on. Electric fans draw a lot of current, the stock alternator may not be up to the task. Most electric fan suppliers offer kits with a temp sensor, relays and wiring, I think a kit is the way to go.

FYI, I read some unfavorable reviews of the cold case electric fan setup, saying the shroud restricts airflow at higher driving speeds. Sometimes you don’t know who to believe with online reviews. I am sure other TAC members will have good advice.

1980 T/A 4.9 Non turbo

Gone but not forgotten;
1973 T/A 455
1975 T/A 400
1978 T/A W72
1982 T/A cross fire injected

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roadking77

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Re: Electric Fans
« Reply #2 on: April 10, 2021, 11:59:14 AM »
Thanks, thats the kinda of feedback Im looking for. Like I said, I dont have problems with my 77, if it aint broke dont fix it!. But If an easy upgrade would be that big of an improvement......
It gets hot in MD, but not months on end in the 100 deg range. Pros and Cons most of the seat time is in the summer months, however being black on black with non working a/c I dont take it out much on 90 deg days. I have missed more than a few shows (including prob the only POCI convention that will be within driving distance in my lifetime) due to extreme heat.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

MNBob

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Re: Electric Fans
« Reply #3 on: April 10, 2021, 01:00:10 PM »
After having both mechanical and electric fans, I like an electric.  The average mechanical fan uses 15HP to run, some use as much as 30HP.  An electric fan only runs when it needs to, not all the time.  So when the engine is warming up it is not on.  I put a light on my dash so I could see when it runs and it is not that often.  It is also not needed on the highway.

I opted for the biggest electric fan there is, a Lincoln Mark VIII at 5000 cfm.  I set it up using a relay and a temperature sensing switch to turn on at 180 off at 160 degrees.  The first relay melted at the terminal (still worked) so I had to install a more HD one with bolt on connectors.  While this worked, it was still causing surges in the electrical system when turning on and off.

The best way to run an electric fan is with a controller.  The best controllers use PWM (Pulse Width Modulation) to operate the fan. The technology turns the fan off and on at a low speed (so there is no surging) and adjusts the fan rpm in relation to the engine temp. The fan almost never runs full speed keeping it quieter.  Some smaller electrics may not need a controller, I don't know, but mine did.

Here is the controller I purchased and plan to install this summer (Auto Cool III in black see bottom of the page):

https://www.autocoolguy.com/product-page/auto-cool-50-pwm-controller
1979 TATA Extreme TKO .64
Hedman elite; Pypes 2.5; Borla XS; MSD 6A; Performer intake; open scoop; Sniper QJ;  110 Amp Alt; 4 core radiator/Mark VIII fan; RobbMc mini starter; subframe connectors; solid body mounts; fiberglass rear springs; poly sway bar and link bushings; 81 master; D52’s; Blazer disks; 225/60 & 235/60 17's TrueContact's; relays for PW, PDL, lights; keyless entry

737driver

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Re: Electric Fans
« Reply #4 on: April 10, 2021, 09:50:38 PM »
I think the electric fans are worthwhile. Pretty much can second the “pro” opinions.  If you have a 100 amp alternator that should work fine. One thing I do like is that it opens up the engine area, with no mechanical fan and shroud. The wiring process isn’t complicated in my opinion, pretty much straightforward. The cooling is much better at low speeds and at idle.
Jim
1979 Trans Am- Heritage Brown -W72 (Pontiac 400) -4Speed-WS6
1972 LeMans Convertible
1977 Trans Am
1972 Firebird
1971 Firebird
1977 MGB  Roadster Convertible

Re: Electric Fans
« Reply #4 on: April 10, 2021, 09:50:38 PM »

MNBob

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Re: Electric Fans
« Reply #5 on: April 11, 2021, 06:51:56 AM »
There are a ton of aftermarket fans available now.  Most come with an integrated shroud which is what you want.  Some come in combination with a radiator that they are designed to mount to.  Some can be mounted in front of the radiator.  Some come with built-in electronics and sensors.

Summit lists hundreds of them.  They list dimensions, mounting depth and amp draw for most.  Here are a couple of examples:

https://www.summitracing.com/parts/der-16927

https://www.summitracing.com/parts/flx-180
1979 TATA Extreme TKO .64
Hedman elite; Pypes 2.5; Borla XS; MSD 6A; Performer intake; open scoop; Sniper QJ;  110 Amp Alt; 4 core radiator/Mark VIII fan; RobbMc mini starter; subframe connectors; solid body mounts; fiberglass rear springs; poly sway bar and link bushings; 81 master; D52’s; Blazer disks; 225/60 & 235/60 17's TrueContact's; relays for PW, PDL, lights; keyless entry

roadking77

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Re: Electric Fans
« Reply #6 on: April 11, 2021, 08:01:24 AM »
Thanks again,  Thanks Bob, I knew you did an electric settup on your car, was hoping you would chime in.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

DeVilliers

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Re: Electric Fans
« Reply #7 on: April 12, 2021, 03:14:08 AM »
Wiring is pretty straight forward. Buy a wiring kit for what you want to do.

Not having the original motor in there, and with the 350 Chevy in there, I can't do much about looks now.
I kept the original fan and shroud. The previous owner actually had the fan wrong way round and instead of fixing this, he removed the thermostat.  :-?

When I re-built the motor I put the thermostat in. On first start I realised the fan is "pushing" instead on "pulling". Sorted that out. I also decided to add an additional 16" electric fan on the front of the radiator that will push air to the other side. The two fans would then work together.
I bought this
https://www.ebay.com/itm/Electric-Fan-Relay-W-Thermostat-Install-Kit-Hardware-Kit-180-200/262495842468?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111314%26meid%3D642021cb9f1d48d78de3e5e49bb23a5d%26pid%3D101195%26rk%3D3%26rkt%3D12%26mehot%3Dco%26sd%3D373433585259%26itm%3D262495842468%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseUnbiasedWeb%26brand%3DCustom&_trksid=p2047675.c101195.m1851

The electric fan will only come on then needed. Especially in traffic.
1979 Trans Am

Re: Electric Fans
« Reply #7 on: April 12, 2021, 03:14:08 AM »
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