The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-16-2007, 11:18 AM   #1
magwakeenercew2jh
RAT1968 '68 Cab/'71 Parts
 
magwakeenercew2jh's Avatar
 
Join Date: Feb 2002
Location: Coarsegold, CA
Posts: 2,375
Radiator and Electric Fan

Can any of you guys give me some direction on what is the best set up on this?

'83 Stepper with a 350 transplant, which came with a new 4-core radiator. I guess the fan shroud wouldn't fit, and the guy said, "either big-block fan shroud or electric fan set up".
I'm not going to question why small block to small block caused the shroud to not fit, because I wanted to go to an electric set-up anyway.

So, the question is, what is the hot set-up (no pun intended). I need to have a temp (on/off) control, too.

Thanks.

Starting all over again...This time with an '83 ...That time it was a '72.
Attached Images
 
__________________
M17
Coarsegold, CA
RAT's shiny now.
But always a rat.

Last edited by magwakeenercew2jh; 08-16-2007 at 11:19 AM. Reason: Grammar
magwakeenercew2jh is offline   Reply With Quote
Old 08-16-2007, 12:19 PM   #2
swb85
On a budget like Fred Sanford
 
swb85's Avatar
 
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
Re: Radiator and Electric Fan

I run an aluminum shroud and single 16" s-blade fan, along with a Be Cool thermal switch/relay that turns the fan on at 195* and shuts off at 175*. It pulls enough air to cool my 383 sitting in traffic in 105* ambient temps. You'll want to upgrade to at least a 100amp alternator for an electric setup if you don't already have one. Any fan worth a crap is going to pull significant amperage.
I'm into my setup for just under $200. A couple budget options would be a Mark VIII fan (big airflow, cheap & all over ebay), or a pair of LS1 fbody fans. Both will require some sort of relay & thermal (or manual) switch to operate.
__________________
'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread
'98 Camaro z28: 370ci twin turbo 370ci build
'01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD
swb85 is offline   Reply With Quote
Old 08-16-2007, 03:44 PM   #3
pcmcobra
Registered User
 
pcmcobra's Avatar
 
Join Date: Aug 2006
Location: Florida
Posts: 1,684
Re: Radiator and Electric Fan

Here's my setup on my 86:





LS1 fans off ebay/hawks thirdgen $50, flexalite controller $90 from summit, some angled aluminum stock from metalsdepot.com $12, $5 worth of hardware from home depot.

These things move some air. You could go with a less expensive contriller, there are several good ones out there, I bought the flexalite on a whim, but it works great and has some nice features.
This pic is from when I got the brackets on, and was just fitting the rad/fans back into my truck, I'll try and take some "finished" pics later.
__________________
1986 C10 SWB 6.0/6l90e

Miami...Flee it like a native
pcmcobra is offline   Reply With Quote
Old 08-16-2007, 05:59 PM   #4
magwakeenercew2jh
RAT1968 '68 Cab/'71 Parts
 
magwakeenercew2jh's Avatar
 
Join Date: Feb 2002
Location: Coarsegold, CA
Posts: 2,375
Re: Radiator and Electric Fan

Nice. Thanks, Guys.

If you have any more tips on the thermal controller and connections, etc., I'm a sponge for your knowledge.
__________________
M17
Coarsegold, CA
RAT's shiny now.
But always a rat.
magwakeenercew2jh is offline   Reply With Quote
Old 08-16-2007, 06:56 PM   #5
swb85
On a budget like Fred Sanford
 
swb85's Avatar
 
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
Re: Radiator and Electric Fan

You'll have to pay for them (usually 70-90 bucks), but IMO it's really hard to beat the pre-made controllers like the ones pcmcobra & I both have. All you do is give it 12v and a ground, the wires are labeled so it's nearly impossible to screw up. I hate wiring, and doing it this way is soooo much easier than piecing relays & switches together.
__________________
'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread
'98 Camaro z28: 370ci twin turbo 370ci build
'01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD
swb85 is offline   Reply With Quote
Old 08-16-2007, 10:47 PM   #6
Pyrotechnic
Registered User
 
Pyrotechnic's Avatar
 
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
Re: Radiator and Electric Fan

My dad played hell with a Flexalite VSC on his 2002. It worked decently at first but it was extremely unreliable. After that he bought a harness from Nelson Performance that connects to a pin on the PCM and uses relays to trigger the fans and since then it has been very reliable.

I like the kits that use a temperature switch that screws into the water jacket on the head or intake to trigger a relay, or two relays if you are using dual fans. I would add a manual switch as well, which only takes a switch that grounds out the temperature sensor wire.
Pyrotechnic is offline   Reply With Quote
Old 08-16-2007, 10:55 PM   #7
hardline_42
Registered User
 
hardline_42's Avatar
 
Join Date: Nov 2006
Location: Englishtown, NJ
Posts: 27
Re: Radiator and Electric Fan

I have the Mark VIII setup on my '81 Camaro and will be doing it again on my '87 SWB. I used a DC Controls fan controller which comes with all the hardware you need including a thermostat to wire it so you avoid voltage spikes. It ramps the voltage up slowly and the fan has never gone full speed (not really needed). I've also heard good things about the Spal controller. Coupled with the aluminum radiator I'm canibalizing from my '71 K20, this thing is gonna run super cool.
hardline_42 is offline   Reply With Quote
Old 08-16-2007, 11:00 PM   #8
C&C Chevy
Registered User
 
C&C Chevy's Avatar
 
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
Re: Radiator and Electric Fan

Quote:
Originally Posted by hardline_42 View Post
I have the Mark VIII setup on my '81 Camaro and will be doing it again on my '87 SWB.
Mark VIII? Could you clarify, please.
__________________
Robert

Current:
1986 SWB Silverado 4.3 / TH400

Past:
1985 SWB Silverado 305 / TH350 - sold 1995
1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007
C&C Chevy is offline   Reply With Quote
Old 08-16-2007, 11:17 PM   #9
Pyrotechnic
Registered User
 
Pyrotechnic's Avatar
 
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
Re: Radiator and Electric Fan

Lincoln Mark VIII
Pyrotechnic is offline   Reply With Quote
Old 08-16-2007, 11:32 PM   #10
C&C Chevy
Registered User
 
C&C Chevy's Avatar
 
Join Date: Feb 2003
Location: Midwest City, OK
Posts: 1,001
Re: Radiator and Electric Fan

Any specific years for those fans?
__________________
Robert

Current:
1986 SWB Silverado 4.3 / TH400

Past:
1985 SWB Silverado 305 / TH350 - sold 1995
1987 1/2 ton Silverado - FI 350 / 700R4 sold 2007
C&C Chevy is offline   Reply With Quote
Old 08-18-2007, 07:50 PM   #11
hardline_42
Registered User
 
hardline_42's Avatar
 
Join Date: Nov 2006
Location: Englishtown, NJ
Posts: 27
Re: Radiator and Electric Fan

Try eBay:

http://shop.ebay.com/mark-viii-fan_W...kQ20viiiQ20fan

For the controller (or the whole kit with a brand new fan) try DC Controls:

http://www.dccontrol.com/

The p/n is : F8LH 8C607 AA

Theres some good reading here: http://www.geocities.com/smithmonte/...rkVIII_Fan.htm

Last edited by hardline_42; 08-18-2007 at 07:53 PM.
hardline_42 is offline   Reply With Quote
Reply

Bookmarks

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 Off

Forum Jump


All times are GMT -4. The time now is 10:52 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com