BarFlyFisherman
NAXJA Forum User
Stock XJ Clutch fan pull 2,000 CFM.
Stock XJ auxiliary E-fans pull 1,350 CFM.
Stock XJ auxiliary E-fans pull 1,350 CFM.
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Mechanical fan CFM?
- Thread starter mrtosh
- Start date
O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
Finally, an answer... Thanks BarFlyFisherman. Where did you find the information?
I am running the Ford 8c607 series fan as the prime fan. According to Ford, it is a 3800cfm fan at 14VDC. I run it on low to keep air moving across the alternator using the Ford fan dropping resistor. It switches to high speed when the controller calls for fan. I have also rewired the stock fan to come on when either the controller of the A/C calls for fan. Lifted the entire Ford setup, relays and wire and all, fromt the local u-pull-and-pay. Cost about $30 for the lot. My Heep operates between 194F and 201F all day, every day. I am using a 180 T-Stat and a controller on the electric water pump which allows the engine to get to temp. I only run a T-Stat to decrease warm up time. Otherwise, it would not be needed.
I am running the Ford 8c607 series fan as the prime fan. According to Ford, it is a 3800cfm fan at 14VDC. I run it on low to keep air moving across the alternator using the Ford fan dropping resistor. It switches to high speed when the controller calls for fan. I have also rewired the stock fan to come on when either the controller of the A/C calls for fan. Lifted the entire Ford setup, relays and wire and all, fromt the local u-pull-and-pay. Cost about $30 for the lot. My Heep operates between 194F and 201F all day, every day. I am using a 180 T-Stat and a controller on the electric water pump which allows the engine to get to temp. I only run a T-Stat to decrease warm up time. Otherwise, it would not be needed.
BarFlyFisherman
NAXJA Forum User
I used my sniper anemometer to measure the MPH of the airflow.
With a little math, converted the radius to area, then to cubic feet per minute.
I also did this to verify the advertised CFM of the Triple Threat electric fans that I installed - they were right on the money at 3400 CFM!
With a little math, converted the radius to area, then to cubic feet per minute.
I also did this to verify the advertised CFM of the Triple Threat electric fans that I installed - they were right on the money at 3400 CFM!
blubullett
NAXJA Forum User
- Location
- Modesto CA
So the tripple threat fans do pull 3400. Awesome. Is that for the kit with the fan shrouds or the kit without them?
I ran that kit all last year with only 2 of the fans because I lunched one due to bad engine mounts and it never got hot.
I ran that kit all last year with only 2 of the fans because I lunched one due to bad engine mounts and it never got hot.
- Location
- Roanoke VA
A thread from the dead!
Anyway, i'm running dual 97+ e-fans on my RENIX and they keep up fine. I kill so I can just leave them on if I need toed 3 of the Hayden adjustable fan controllers before I switched to the Hayden "Snap Switch" and dual relays.
The Snap switch comes on around 200 and cuts off around 170. On a average day, 80 degrees, they will cool the engine from 200 down to 170 in a matter of minutes and rarely cut on while driving down the road. I have a LED indicator inside to tell me when they are running and I have a overide switch so I can leave them on full time if needed.
Anyway, i'm running dual 97+ e-fans on my RENIX and they keep up fine. I kill so I can just leave them on if I need toed 3 of the Hayden adjustable fan controllers before I switched to the Hayden "Snap Switch" and dual relays.
The Snap switch comes on around 200 and cuts off around 170. On a average day, 80 degrees, they will cool the engine from 200 down to 170 in a matter of minutes and rarely cut on while driving down the road. I have a LED indicator inside to tell me when they are running and I have a overide switch so I can leave them on full time if needed.
LyonsXJ
NAXJA Forum User
- Location
- New Jersey
At what RPM and temperature did you test the mechanical fan to get the CFM results? I'm intrigued by your method.
My experience.....
I've been running a 180 t-stat and 2 stock 97+ auxiliary fans for over a year now and never once had an issue with overheating. I have them switched separately and normally run 1 fan constantly while offroading. The 2nd fan kicks on occasionally when needed (217*) or when I turn the AC on (99XJ) It's great in the fall/winter time because the Jeep runs so quiet, the noise does get a little annoying on the trails though. I guess it's that or sounding like a school bus going down the road with the mechanical fan. Just have to pick your poison.