Engine & Transmission Post your Engine and Transmission related problems here.
Sponsored by:
Sponsored by:

Stock Radiator Fan

  #1  
Old 04-15-2019, 12:48 PM
Beginning Member
Thread Starter
Join Date: Feb 2019
Posts: 10
StoZR2 is on a distinguished road
Default

Hey guys. Does anybody know the CFM on the stock fan. Anybody have suggestions for an electric fan upgrade. I have a 1998 Chevy Blazer 4.3l v6.
 
  #2  
Old 04-16-2019, 10:34 AM
El_Beautor's Avatar
BF Veteran
Join Date: Jan 2008
Location: Leduc, Alberta
Posts: 2,126
El_Beautor will become famous soon enoughEl_Beautor will become famous soon enough
Default

Not sure on the CFM for the stock mechanical fan, but I used an electric fan from a 99 Intrepid. It's a dual low/high fan that moves a lot of air, and it only cost me $40 from pick-n-pull. I wired mine to trigger based on AC compressor running, coolant temperature, and off a summer/winter switch. I also have a master kill switch so I can turn them both off (with a warning light) if I need them off for a water crossing or other such scenario.

I've had the efan in my 02 Sonoma for 6 months now, and the fan rarely turns on for temperature unless I'm sitting idle in traffic. I do have it wired so that when the ambient temperature stays above 20*C most of the time I'll flip the season switch so that one of the fans is on always, and then it will kick to high when triggered by the coolant temperature switch.
 

Last edited by El_Beautor; 04-16-2019 at 10:38 AM. Reason: adding info
  #3  
Old 04-16-2019, 05:39 PM
New Member
Join Date: Feb 2019
Location: Iowa
Posts: 71
eshaw is on a distinguished road
Default

So is this ran off your computer?
 
  #4  
Old 04-18-2019, 12:25 PM
El_Beautor's Avatar
BF Veteran
Join Date: Jan 2008
Location: Leduc, Alberta
Posts: 2,126
El_Beautor will become famous soon enoughEl_Beautor will become famous soon enough
Default

Originally Posted by eshaw View Post
So is this ran off your computer?
No, I did not get my ECU flashed to control an e-fan, although that is quite possible. I have a mechanical temperature sensor from a port in the lower intake manifold beside the thermostat. I swapped to a lower intake manifold from a '99 Blazer (one that has accommodations for an EGR) because it had a plugged port right below the thermostat. I removed the plug and the port has the same standard thread as the factory temperature sensors. I bought a temperature sensor from Amazon that triggers at 95*C, then turns off again when it has cooled to 85*C. I just blocked off all the EGR ports in the swap LIM because my engine does not use an EGR.
 
  #5  
Old 04-19-2019, 08:48 AM
New Member
Join Date: Feb 2019
Location: Iowa
Posts: 71
eshaw is on a distinguished road
Default

Originally Posted by El_Beautor View Post
No, I did not get my ECU flashed to control an e-fan, although that is quite possible. I have a mechanical temperature sensor from a port in the lower intake manifold beside the thermostat. I swapped to a lower intake manifold from a '99 Blazer (one that has accommodations for an EGR) because it had a plugged port right below the thermostat. I removed the plug and the port has the same standard thread as the factory temperature sensors. I bought a temperature sensor from Amazon that triggers at 95*C, then turns off again when it has cooled to 85*C. I just blocked off all the EGR ports in the swap LIM because my engine does not use an EGR.
Got any pics of this setup? I have electric fans in the works that I'd like to have controlled by the 0411 computer but before I swap to that computer I'd like to control the fans without buying a aftermarket controller before making the switch. I suppose I could just hook them up to a battery with a toggle switch in the interim but the electric fans supposedly draw a lot of amperage on startup.
 
  #6  
Old 04-19-2019, 09:19 AM
blazen_red_4x4's Avatar
Super Member
Join Date: Apr 2014
Location: Lake City, Florida
Posts: 1,298
blazen_red_4x4 is on a distinguished road
Default

I'm running a similar setup with the Intrepid fans. Mine are just wired to a 3 way toggle switch in the cab controlling 2 relays for high and low speed. They're wired to get power with ignition, with switch in one position has them kick on low speed, one position high speed, and the other position is just override off, useful for water crossings as mentioned above and also tinkering around under the hood when you need the ignition on but don't necessarily want the fans running.

I'd post pictures but I'm at work right now and our IT department has locked down our internet connection so much that I can't get PhotoBucket to load up properly and grab the links... so I can post some later this afternoon. My end goal was to have the setup look basically stock, like the truck could have came that way from the factory, and it came out pretty well.
 
  #7  
Old 04-19-2019, 01:40 PM
blazen_red_4x4's Avatar
Super Member
Join Date: Apr 2014
Location: Lake City, Florida
Posts: 1,298
blazen_red_4x4 is on a distinguished road
Default








Never know the wiser looking under the hood, unless you peaked around the upper fan shroud that I kept intact

 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gitch93
Engine & Transmission
9
07-23-2013 08:06 AM
cheesequaker
2nd Gen S-series (1995-2005) Tech
4
04-25-2012 01:44 PM
85kulan
2nd Gen S-series (1995-2005) Tech
6
10-04-2011 09:51 AM
valeria1782
2nd Gen S-series (1995-2005) Tech
8
01-24-2011 04:12 AM
upblazer95
2nd Gen S-series (1995-2005) Tech
6
11-16-2008 03:20 AM


Thread Tools
Search this Thread
Quick Reply: Stock Radiator Fan


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.