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 Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-30-2013, 05:15 PM   #1
rs74
Senior Member
 
rs74's Avatar
 
Join Date: Jun 2010
Location: Illinois
Posts: 1,997
Blower motor upgrade

Alot of you may already know about this but I just came across it today. Supposedly if you take a blower motor and fan for a 94 Chevy truck and put it in a square with air that it blows alot more air. Somebody on FB was saying something about it then posted a link. So here it is. Something to look into.

http://forum.73-87chevytrucks.com/sm...&topic=19365.0
__________________
Roy
85 Short Bed Silverado- Work in progress.
85 K30 RC Dually-6.2 Diesel,400,205 on 33's
84 K30 C&C 454,400,205 SOLD
rs74 is offline   Reply With Quote
Old 10-30-2013, 08:04 PM   #2
Rubble
Registered User
 
Rubble's Avatar
 
Join Date: Feb 2012
Location: Big Valley. Alberta
Posts: 583
Re: Blower motor upgrade

Replacing your old blower motor with a new stock one will make a big difference.I just did this in my crew.Also on my crew,most of the a/c stuff is long gone,so I pulled the evaporator core out of the heater-a/c box when I was replacing the heater cire& this really helped with air flow too.
__________________
1986Chev K20 350/465/208/14bolt ff 7" lift on 35s DD
1981GMC CCLB 454/400/205/60/14 bolt. D.D.
1982 GMC K25 6.2/A833/208/14bolt sf,6" lift on 35s
1980 Chevy C20,350/465/14 bolt
1986 GMC K25 6.2/400/208/14 bolt ff/ 4 inch lift/33s
" Rock n Roll ain't noise pollution"
Rubble is offline   Reply With Quote
Old 10-30-2013, 08:30 PM   #3
Rascal_one2001
Registered User
 
Rascal_one2001's Avatar
 
Join Date: Dec 2006
Location: North Carolina
Posts: 270
Re: Blower motor upgrade

nice mine has been getting weaker and weaker I guess I know what I am going to replace it with.
__________________
1985 1500 454, 700r4, 12 bolt, 5/6 drop, 20s
Rascal_one2001 is offline   Reply With Quote
Old 10-30-2013, 09:40 PM   #4
rs74
Senior Member
 
rs74's Avatar
 
Join Date: Jun 2010
Location: Illinois
Posts: 1,997
Re: Blower motor upgrade

I guess it is supposed to spin alot faster than what ours call for.
__________________
Roy
85 Short Bed Silverado- Work in progress.
85 K30 RC Dually-6.2 Diesel,400,205 on 33's
84 K30 C&C 454,400,205 SOLD
rs74 is offline   Reply With Quote
Old 10-30-2013, 10:41 PM   #5
Edahall
Registered User
 
Join Date: May 2011
Location: Goliad, TX
Posts: 485
Re: Blower motor upgrade

It's the same size motor. If you old one is still good, you can just lube the bearings and it'll run just like the new ones.
__________________
1990 ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive - HX35 Holset Turbo
-NP205 iron transfer case
-3.73 gears -2" Lift
Edahall is offline   Reply With Quote
Old 10-31-2013, 09:04 AM   #6
motornut
78 & 79 Jimmys
 
motornut's Avatar
 
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,003
Re: Blower motor upgrade

check the connections too,try adding a ground wire see if it gets better
take the blower out,clean out the "hampster wheel" mice may even have used it's space for nesting
__________________
John http://www.youtube.com/user/TheMotornut

2002 Fleetwood Prowlerhttp://67-72chevytrucks.com/vboard/s...d.php?t=431859
1978 Suburban4X2-hit while parked RIPzez
1978 OldsCutopless-CanadaDayCar
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...d.php?t=421767
1979 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=2
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez http://67-72chevytrucks.com/vboard/s...=417457&page=4
1989 Suburban4X2 - square igloo/SOLD
2003 Grand Am 2.2 his DD
2005 Malibu 2.2 her DD
2009 Vibe from Dad
Love em low,but get me higher
motornut is offline   Reply With Quote
Old 10-31-2013, 11:14 AM   #7
85/Silverado
Registered User
 
85/Silverado's Avatar
 
Join Date: Nov 2011
Location: Port St. Joe Fl.
Posts: 104
Re: Blower motor upgrade

"hampster wheel" mice may even have used it's space for nesting

Do you mean a work-out-area.
85/Silverado is offline   Reply With Quote
Old 10-31-2013, 01:45 PM   #8
motornut
78 & 79 Jimmys
 
motornut's Avatar
 
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,003
Re: Blower motor upgrade

Quote:
Originally Posted by 85/Silverado View Post
"hampster wheel" mice may even have used it's space for nesting

Do you mean a work-out-area.
yup, lol
__________________
John http://www.youtube.com/user/TheMotornut

2002 Fleetwood Prowlerhttp://67-72chevytrucks.com/vboard/s...d.php?t=431859
1978 Suburban4X2-hit while parked RIPzez
1978 OldsCutopless-CanadaDayCar
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...d.php?t=421767
1979 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=2
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez http://67-72chevytrucks.com/vboard/s...=417457&page=4
1989 Suburban4X2 - square igloo/SOLD
2003 Grand Am 2.2 his DD
2005 Malibu 2.2 her DD
2009 Vibe from Dad
Love em low,but get me higher
motornut is offline   Reply With Quote
Old 10-31-2013, 07:39 PM   #9
Sabaka454
Registered User
 
Sabaka454's Avatar
 
Join Date: Jul 2005
Location: CT
Posts: 105
Re: Blower motor upgrade

Did you happen to catch this post?

Quote:
This is not an upgrade, they're the same motor

1978 C10 with AC part # 35334 is the same as 1994 C10 with AC part # 35334

Sorry to burst the bubble
Sabaka454 is offline   Reply With Quote
Old 10-31-2013, 07:47 PM   #10
rs74
Senior Member
 
rs74's Avatar
 
Join Date: Jun 2010
Location: Illinois
Posts: 1,997
Re: Blower motor upgrade

Quote:
Originally Posted by Sabaka454 View Post
Did you happen to catch this post?
Why yes I did. I looked on O'reillys site for a motor for an 85 and one for 94. They were two different part numbers. They were not AC parts brand though.
__________________
Roy
85 Short Bed Silverado- Work in progress.
85 K30 RC Dually-6.2 Diesel,400,205 on 33's
84 K30 C&C 454,400,205 SOLD
rs74 is offline   Reply With Quote
Old 10-31-2013, 10:35 PM   #11
SkinnyG
Registered User
 
SkinnyG's Avatar
 
Join Date: Feb 2012
Location: Sunny Okanagan, Canada, eh?!
Posts: 165
Re: Blower motor upgrade

We had a similar thread here a while back on the same thing. http://67-72chevytrucks.com/vboard/s...d.php?t=593977 I had made the bold but cryptic statement that the perceived improvement was merely a result of "new" being better condition than the "old" fan it was replacing.
__________________
The Crusty Chevy: 1977 Silverado, shortboxed & dropped, potato-potato.
SkinnyG is offline   Reply With Quote
Old 11-01-2013, 12:37 AM   #12
Rubble
Registered User
 
Rubble's Avatar
 
Join Date: Feb 2012
Location: Big Valley. Alberta
Posts: 583
Re: Blower motor upgrade

Quote:
Originally Posted by SkinnyG View Post
We had a similar thread here a while back on the same thing. http://67-72chevytrucks.com/vboard/s...d.php?t=593977 I had made the bold but cryptic statement that the perceived improvement was merely a result of "new" being better condition than the "old" fan it was replacing.
Pretty much what I said too......
__________________
1986Chev K20 350/465/208/14bolt ff 7" lift on 35s DD
1981GMC CCLB 454/400/205/60/14 bolt. D.D.
1982 GMC K25 6.2/A833/208/14bolt sf,6" lift on 35s
1980 Chevy C20,350/465/14 bolt
1986 GMC K25 6.2/400/208/14 bolt ff/ 4 inch lift/33s
" Rock n Roll ain't noise pollution"
Rubble is offline   Reply With Quote
Old 11-01-2013, 10:14 AM   #13
bnoon
Senior Member
 
Join Date: Jul 2012
Location: Des Moines IA
Posts: 754
Re: Blower motor upgrade

Has anyone thought about a voltage stepper for the high setting? That's what I'm looking into. Since the connectors appear to be simple spade connectors, something could be made plug-and-play without hacking the harness even.
__________________
- 1974 GMC Super Custom 1500 - UPDATE: GOING 5.3 TURBO! - "Mr. Green Jeans"
- 2002 BMW M3 'vert - SMG trans, intake, tune - "Fraulein"
- 2008 Toyota FJ - 4WD, ARB front/rear bumpers with Warn winch - "The Wench"
bnoon is offline   Reply With Quote
Old 11-01-2013, 04:05 PM   #14
SilverMiner
Registered User
 
SilverMiner's Avatar
 
Join Date: Oct 2005
Location: North Idaho
Posts: 113
Re: Blower motor upgrade

I installed a new blower motor for a '94 into my '80 this summer as well, and I took advantage of an opportunity to take some measurements with a calibrated anemometer before and after the upgrade. I reported my results in this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=594506

Basically it was a bit of a disappointment in the sense that the increase in flow was barely perceptible, but it was measurable. Given the very low cost of a new blower motor I decided it was definitely worth the money spent. For $20 dollars or so I realized nearly a nearly 15% improvement in air flow.

Perhaps my blower had been replaced years ago, and if it had been the original stock blower from 35 years ago I'd have seen a much greater improvement. I'd say if a person has any doubts about their blower, just plunk down the money and see if things get better. But unless you have a way to measure the difference, it is very possible you won't be able to tell.
__________________
1980 K10 Suburban Silverado
SilverMiner is offline   Reply With Quote
Old 11-01-2013, 04:14 PM   #15
SilverMiner
Registered User
 
SilverMiner's Avatar
 
Join Date: Oct 2005
Location: North Idaho
Posts: 113
Re: Blower motor upgrade

Quote:
Originally Posted by bnoon View Post
Has anyone thought about a voltage stepper for the high setting? That's what I'm looking into. Since the connectors appear to be simple spade connectors, something could be made plug-and-play without hacking the harness even.
I'm VERY interested to hear more about this idea. Given the relatively low cost of the blowers and how easily they can be replaced, even if a voltage increase significantly decreases the useful life of the motor it might be worth the tradeoff.

But isn't the blower already getting maximum system voltage when the fan is set to HIGH? How would you increase the voltage even further?
__________________
1980 K10 Suburban Silverado
SilverMiner 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 -5. The time now is 12:40 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com