[JerryTX]

Originally Posted by ken o

I think the lower sensor is for the gauge.

The sensor from BW is 3/8. The bung on the radiator is 1/8. I might get an inline adaptor and put the 3/8 in it and the sensor for the new water gauge on the radiator bung.

Yep, more power, no points.

Think I could use the OEM sensor for a Stack water temp gauge?

I think the inline adapter is good for the trigger point. I have no idea what BMW uses for sensor voltage, it could be 0-5v (likely) or some other range (not as likely). Confirm the Stack gauge comes with a 0-5v range sender and if so, you'll probably get it to work by using the OEM sensor. Worst case you add a T adapter to the factory location and run both.

Have others ever tried an electric fan and seen a benefit on track? You could test for an improvement by removing the mechanical fan during a hot session and checking your lap times. I could wrench for you if you want to try it, lemme know.

[JRM3]

Step 1 is to wire in the aftermarket gauge for water temp and get your readings. If it's hot then start worrying about adding/deleting fans, bigger radiators etc...

At least that's my plan.

[Xtreme M3]

Originally Posted by PerkM3

I don't have an aux fan to wire to and don't want to deal with adding a bung in the radiator for an addition sensor, that's the only reason I'm opting for on/off switch only.

i just purchased the whole kit and will probably opt for the on off switch as the car is primarily a track car. When somone figures out the wiring snap some pictures so i know where im connecting the leads to. Thanks!

John

[A White m3]

30101516 is the fan I got, and was recommended to get by bimmerworld. They said it would be fine to run in my m3 with no front aux fan(mine is not working for unknown reasons atm..) It turns on when the temp is at the second white line(pretty uncomfortably high for me...) I have a bored out thermostat(came with the car) and the car runs at half way on the freeway and maintains a good temp around town unless i'm sitting at a light for a while or going up hills and in traffic... When the car is moving at any speed however the fan doesn't turn on and even if it did, it would be absolutely worthless, it feels like I could blow at the radiator just as hard as the fan blows -.- The worst part being I spent about 140$ to get the whole kit and it doesn't even work the way its supposed to... Is there one or two speeds for this fan? How do I set the controller as mentioned earlier in the thread?