Radiator Fan/relay

psychoSEAL · #1 (**permalink**) 12-30-2009, 10:43 AM

After a good conversation with Blas and your replies concerning my fan. I have come to the conclusion that this fan, while in the high speed is just to much to handle on my current system. The 40/50 amp relay and the 30 amp fuse is just not enough. After doing some research I found that a Taurus 3.8L fan can produce approx 4000 cfm while drawing around 45 amps. At the low speed a good 2500 cfm and 25 amps. So before I go out and change the entire fan/radiator/wiring I am going to replace the relay and the inline fuse while wiring to the low speed setting. This should be ample enough cfm to cool this motor. I'll keep you informed of my progress. Thanks!

undy · #2 (**permalink**) 12-30-2009, 03:10 PM

Quote:

Originally Posted by psychoSEAL

After a good conversation with Blas and your replies concerning my fan. I have come to the conclusion that this fan, while in the high speed is just to much to handle on my current system. The 40/50 amp relay and the 30 amp fuse is just not enough. After doing some research I found that a Taurus 3.8L fan can produce approx 4000 cfm while drawing around 45 amps. At the low speed a good 2500 cfm and 25 amps. So before I go out and change the entire fan/radiator/wiring I am going to replace the relay and the inline fuse while wiring to the low speed setting. This should be ample enough cfm to cool this motor. I'll keep you informed of my progress. Thanks!

Hollister makes a trick relay/wiring harness expressly for the Taurus and the MK 8 fans. That's what I'm running. You can order it with 180 and a 195 sensors so it will stage both speeds, low speed on @ 180 and hi speed comes on/low speed shuts off at 195. It comes with enough "right sized" wiring to (more than likely) reach your buss bar/fuse block.

http://www.hollisterroad.com/

BTW... Make sure your alternator and main wiring is up to the task too.. (a minimum of a 100 amp alternator is required, 140 more advisable)

Dave

psychoSEAL · #3 (**permalink**) 12-31-2009, 05:48 PM

Undy, That's another issue. This alternator is putting out 60 amps. I thought it was a 100 amps but had it tested by a few shops and 60 amps is more like it. This and not having enough amps in the fuse and relay with a fan that pulled to much amps and you have the problem that I have. Thanks for the idea on the relay!