home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 11-19-2020, 09:40 PM   #1
seanile
Board Member
 
seanile's Avatar
 
Join Date: Feb 2019
Location: Boston
Default Give electric fan a manual on/off switch? (no a/c)

soooo i'm going to be doing the a/c delete on my '92 240 (see sig for specs), while i also have in my possession a new electric cooling fan that will obviously be rendered useless following the delete.

my [dumb] question is if it would be viable to finagle a manual power switch, perhaps via the a/c button, to turn on the electric cooling fan at will on the stupid hot days. would this overwhelm the alternator? i am not super knowledgeable with circuitry but have some friends who are and would help me if i enlisted them, but i wanted to run it by you all as a feasibility study first.

or should i just sell the fan and move on with life.

thoughts? questions? eye rolls?
__________________
1992 240 GL (4dr, B230F, M47, LH 3.1)
seanile is offline   Reply With Quote
Old 11-19-2020, 09:56 PM   #2
carver
Redblock for life.
 
carver's Avatar
 
Join Date: Apr 2011
Location: Seattle
Default

Those fans are not really meant to be run all the time. Kind of like an E-Fan setup. I wouldn't bother. The question that remains... isn't it wicked hawt in Boston in the summer? AC Delete... you sure?
carver is offline   Reply With Quote
Old 11-19-2020, 10:00 PM   #3
seanile
Board Member
 
seanile's Avatar
 
Join Date: Feb 2019
Location: Boston
Default

totally fair. i wasn't considering it as an all the time thing but just a useful extra tool to keep it cool in stop-and-go on the interstates. could always just pour my iced dunkies over the engine if i'm desperate.
i've never been one to use my a/c anyway, i'm more of a drop the windows and turn up the stereo kinda guy.
seanile is offline   Reply With Quote
Old 11-19-2020, 11:33 PM   #4
Harlard
Hurlurd?Harland?Bueller?
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

In that case it's a waste of time as the car has lots of headroom in terms of cooling capacity.
__________________


Herr Harlard am Erstens

1979 242 DL

Quote:
Originally Posted by t8fanning View Post
My knob has a big chunk of steel on it
Harlard is online now   Reply With Quote
Old 11-20-2020, 06:35 PM   #5
142 guy
Board Member
 
Join Date: May 2014
Location: Saskatchewan, Canada
Default

If you go to Speedway Motors, or JEGS or ..... you can find electric fan controllers. If your radiator tank does not have a fitting for an RTD some of these controllers come with a little rubber seal that fits in under the top rad hose and allows you to slip an RTD in to measure the coolant entrance temperature to the rad. The controllers have an adjustable temperature setting for turning the fan on.

Generally simple installation even for the electrically challenged.
142 guy is offline   Reply With Quote
Old 11-20-2020, 08:14 PM   #6
apachechef
Burnt Sierra Madre
 
Join Date: Jan 2009
Location: Fort Joe Smith, Klendathu
Default

Quote:
Originally Posted by Harlard View Post
In that case it's a waste of time as the car has lots of headroom in terms of cooling capacity.
moreso once you remove condenser
__________________
Quote:
Originally Posted by lummert View Post
Dammit, Lummert.
Quote:
Originally Posted by Jesse8931 View Post
Well keep us updated on how your dumbass plan goes.
apachechef is offline   Reply With Quote
Old 11-21-2020, 07:05 PM   #7
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

What is wrong with you guys? It can't run all the time? Says who? If you aren't interested in his idea, stay out. One person added anything constructive.
I have done this, as an over-ride for a temp switch. Lots of people have done a manual switch. And if that fan is there, I guarantee it was built to withstand a switch sticking on and it running constantly.

OP, some systems have a switch in the lower hose area to tell a fan when the radiator is not removing enough heat. So there's another way to do it. I have even used a headlight switch (or maybe an old pull-switch for wipers) to turn on low and high, using a resistor for low. You can do anything you want.
__________________
Quote:
Originally Posted by leecatd8209 View Post
Being dead has a funny way of messing up your small business, too.
mikep is offline   Reply With Quote
Old 11-21-2020, 09:12 PM   #8
seanile
Board Member
 
seanile's Avatar
 
Join Date: Feb 2019
Location: Boston
Default

Quote:
Originally Posted by 142 guy View Post
If you go to Speedway Motors, or JEGS or ..... you can find electric fan controllers. If your radiator tank does not have a fitting for an RTD some of these controllers come with a little rubber seal that fits in under the top rad hose and allows you to slip an RTD in to measure the coolant entrance temperature to the rad. The controllers have an adjustable temperature setting for turning the fan on.

Generally simple installation even for the electrically challenged.
that does sound reasonably doable option to have, thanks. i've got nissens 3 row i'm planning on installing this coming spring. haven't looked closely at it and it's packed away at the moment so i'm not sure what fittings it has available.

Quote:
Originally Posted by mikep View Post
I have done this, as an over-ride for a temp switch. Lots of people have done a manual switch. And if that fan is there, I guarantee it was built to withstand a switch sticking on and it running constantly.

OP, some systems have a switch in the lower hose area to tell a fan when the radiator is not removing enough heat. So there's another way to do it. I have even used a headlight switch (or maybe an old pull-switch for wipers) to turn on low and high, using a resistor for low. You can do anything you want.
excellent, that's exactly what i was looking for. i appreciate your input.
seanile is offline   Reply With Quote
Old 11-22-2020, 01:34 AM   #9
carver
Redblock for life.
 
carver's Avatar
 
Join Date: Apr 2011
Location: Seattle
Default

Ok to be a little more constructive. Here's a way to use an 850 E-Fan relay to turn on a fan. No switch necessary if you just use a relay, turns on and off with the car. Temp switch only turns fan on at whatever temp your switch is rated. Get one of these:



Wire it in like so...



I don't really know the particulars on the AC fan but here's a thread that addresses it.

Questions? PM me anytime.
carver is offline   Reply With Quote
Old 11-22-2020, 06:35 AM   #10
OttoB
Board Member
 
Join Date: Aug 2006
Location: E(Seattle!Vancouver! San Francisco!LA!) Helsinski
Default

When i was innovative (lazy) i used brake light switch to turn on the efan.
OttoB is offline   Reply With Quote
Old 11-22-2020, 09:27 AM   #11
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

C'mon, kid, don't waste your Dunks like that. I'll meet you in the pahkin lot at Kelly's Roast Beef over in f*hkin' Saugus there and we'll take care of it.

In all seriousness yeah, you could use that switch. I would wire it to a relay, not so that it carried all the current through the switch. I'm sure it's not rated for that.
__________________
I AM THE MODAL AMERICAN. Planet money #936.
shoestring is offline   Reply With Quote
Old 11-22-2020, 01:50 PM   #12
seanile
Board Member
 
seanile's Avatar
 
Join Date: Feb 2019
Location: Boston
Default

thanks everyone, very helpful. this gives me a lot to work with.
carver, i'll likely shoot you a note in the spring when i get into installing the new radiator, appreciate the offer.

dammit i haven't been to kelly's in too long, thanks for the reminder to get my ass back over there shoestring
seanile is offline   Reply With Quote
Old 11-22-2020, 02:16 PM   #13
Redwood Chair
K-jet For Life
 
Redwood Chair's Avatar
 
Join Date: Mar 2007
Location: - Stock PSI Or Bust -
Default KISS

Or stick to your original plan with amp rated wiring & a switch installed in a blank plate on the center stack console.
__________________
Raise The Lowered


Image hosted by servimg.com

Quote:
Originally Posted by hiperfauto View Post
Folks on here don't know a good deal when they see it.
how psi stock cna support?


Redwood Chair is online now   Reply With Quote
Old 11-22-2020, 03:32 PM   #14
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

Quote:
Originally Posted by shoestring View Post
C'mon, kid, don't waste your Dunks like that. I'll meet you in the pahkin lot at Kelly's Roast Beef over in f*hkin' Saugus there and we'll take care of it.

In all seriousness yeah, you could use that switch. I would wire it to a relay, not so that it carried all the current through the switch. I'm sure it's not rated for that.
I think he's all set, then. Are we all set? I'm all set.
Watch out for that one guy, though. He's storrowed again.
mikep is offline   Reply With Quote
Old 11-22-2020, 05:52 PM   #15
Redwood Chair
K-jet For Life
 
Redwood Chair's Avatar
 
Join Date: Mar 2007
Location: - Stock PSI Or Bust -
Default

Quote:
Originally Posted by mikep View Post
I think he's all set, then. Are we all set? I'm all set.
Watch out for that one guy, though. He's storrowed again.


All set except for the fuse.

Redwood Chair is online now   Reply With Quote
Old 11-22-2020, 06:22 PM   #16
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

Quote:
Originally Posted by mikep View Post
I think he's all set, then. Are we all set? I'm all set.
Watch out for that one guy, though. He's storrowed again.
Storrowed? I thought he was Makin' it in Massachusetts...
shoestring is offline   Reply With Quote
Old 11-22-2020, 06:38 PM   #17
VB242
Dann sind wir Helden
 
VB242's Avatar
 
Join Date: Sep 2011
Location: 4D space-time
Default

I had it hooked up to switch the ground on position 85 on the above diagram. 86 had power from another relay that turns on with the key. I used an all blue a/c switch and grounded one side of the switch to the steel frame.
__________________
"i will destroy all of you!"
-Sheldon Plankton

Booty Scooty
https://youtu.be/i4oAOZ8nbq4
VB242 is offline   Reply With Quote
Old 11-22-2020, 07:40 PM   #18
mikep
The MP
 
mikep's Avatar
 
Join Date: May 2003
Location: 38° 27' N 75° 29' W
Default

For those of you following along at home:
https://en.m.wikipedia.org/wiki/Storrow_Drive
mikep is offline   Reply With Quote
Old 11-23-2020, 09:39 AM   #19
esmth
Board Member
 
Join Date: Jul 2016
Location: MA/NH
Default

Storrow/Soldier's Field is a fun drive at 1am.
__________________
1991 244 LH2.4 M46 341k miles
esmth is offline   Reply With Quote
Old 11-23-2020, 02:12 PM   #20
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

Quote:
Originally Posted by mikep View Post
For those of you following along at home:
https://en.m.wikipedia.org/wiki/Storrow_Drive
I like the picture of "Storrow drive mid-afternoon". Looks like they photoshopped all the cars out.

Last post from me on this. Sorry to jack this thread.
shoestring is offline   Reply With Quote
Old 11-23-2020, 02:26 PM   #21
seanile
Board Member
 
seanile's Avatar
 
Join Date: Feb 2019
Location: Boston
Default

all good, i've watched a semi being backed up from the BU bridge by staties before. ****in hilarious.
my favorite part is the wiggle under the longfellow overpass. makes the tires chirp every time.
seanile is offline   Reply With Quote
Old 11-23-2020, 02:54 PM   #22
brickcupra
Board Member
 
Join Date: Sep 2016
Location: Chicago Il
Default Fan switch

Hey , It might be a little hard to do wiring, but all the ideas above sound good. Just a tip, make sure you have heavy duty gauge like # 8 or so to power the relay and the fan. Also use a fuse between the power supply ( Battery or any place with heavy gauge power) and a good clean ground. It might be a good idea too to use a diode to prevent power back feed into the relay . I used a temperature controlled switch but I swap my engine to a supra 7mgte and I had an extra port in the coolant thermostat housing.
Good luck. the a/c fan is a push fan. It will be a good a idea to use a pull fan ( behind the radiator) and eliminate the fan clutch system , Youll safe some horse power.
Take care
DZ
brickcupra is offline   Reply With Quote
Old 11-23-2020, 06:41 PM   #23
Harlard
Hurlurd?Harland?Bueller?
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

Quote:
Originally Posted by mikep View Post
What is wrong with you guys? It can't run all the time? Says who? If you aren't interested in his idea, stay out. One person added anything constructive.
Mike, it will literally cool better with the little auxiliary fan and the evaporator out of the way. Hell, a car making 3-4x the power will handle the extra heat output just fine with the same hardware OP has. If an auxiliary fan is needed, then there is something broken with the system that needs to be addressed. Plain and simple.

Furthermore it will actually be a nice little chunk of change for OP if they put those things up for sale as the late model dual pass stuff is pretty desirable
Harlard is online now   Reply With Quote
Old 11-23-2020, 09:37 PM   #24
Marvelous3
Who engineered this?
 
Marvelous3's Avatar
 
Join Date: Nov 2002
Location: Atlanta
Default

Yes, it can be done. My old grey car had a manual rocket switch that controlled the pusher fan for the ac. It’s a simple single pole relay, some wiring, and a rocker switch. Probably take you an hour or two to wire up and make it look nice.
__________________

1990 240dl Kaplhenke Coilover Daily
1991 245+16 Valve Turbo Microsquirt
Need Hyundai or Genesis parts? PM me for Genuine Hyundai or Genesis parts
Marvelous3 is offline   Reply With Quote
Old 11-28-2020, 09:17 AM   #25
dalek
Benchracer Tribe
 
dalek's Avatar
 
Join Date: Oct 2005
Location: Orange Alert, NC
Default

I thought the turbobricks way was to have an exposed wire you grounded to an exposed frame part to turn the fan on.
__________________
"you can't leave your thingy hanging in public... you can get arrested."
"What's Arkansas supposed to be, Kansas for pirates?" Forg
"I think I can touch the tire. Damn! I can touch the tire! That hurts!" 240Psycho (on the back seat of my 94 Jetta while I was driving to a J/Y)
"Use the barbed adapter like what I use to inflate the air camping mattresses and my dates." FTF Engineering
i am inspired. i will replace my windsheild... with an intercooler.swedishK
Feedback!
dalek is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 08:20 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.