I'd rather do it myself
Join Date: Aug 2009
Location: Flat lands of Illinois
Mentioned: 21 Post(s)
Tagged: 1 Thread(s)
Quoted: 3 Post(s)
There really are two circuits for the fans. The lo speed goes through the resistor to drop the voltage down to about 10v and hi speed is the full 12v. When the hi speed is commanded on both the circuits and relays are active, so it is passing 12v and 10v to the fan motor. Obviously the fan is using the 12v and it is some sort of a fail safe logic.
BR using the PA software has told me they really can't fix their issue of the lo speed being on all the time. And I can assure you the hi speed will not come on, with their tune, due to coolant temp.
I don't know what the issue is and it's kind of ridiculous actually. It's a bug in the programming or otherwise I don't see why they would change anything from stock. But it is the reason I put in the separate independent controller, to keep the lo speed fan off rather than have it running all the time and use the hi speed for cooling and AC. I suppose if you have the IC in the stock location then the fan running all the time under 35 mph is beneficial.
With the Koyo V6 radiator there really is little need for the fan at all as far as engine cooling. As long as the car is moving or has not been sitting idling for 10 minutes or so it never comes on and is set at 200F.
FWIW the 13's all use the same radiator; the V6 one. The shroud and fan are still different part numbers, which I don't know why. The only reason someone should use the Mishimoto radiator for the 2L is to maintain the IC in the stock location.
2010 Red 2.0L track
If the Pharaohs had duct tape, the Sphinx would still have a nose...."
Last edited by Red Raspberry; 05-11-2015 at 05:04 AM.