The Cart Before the Horse: Spec 3 Build

[Senor_Taylor]

Does anyone have an example of how they wired up their fan?

I could either
1. Wire it up to a switch (relay optional, but smart)
2. Wire it up to turn on with the aux fan
3. Buy the Bimmerworld wiring kit for it, but have to put a bung on my radiator for the temp switch.

Are they other options? I honestly don't suspect the car will ever get too hot with the aux fan and the robust cooling system, so I figure I can wire it to a switch and just flip it on if I ever see temps creep. It'd be nice to be able to leave the fan running after coming off track and having the car off.

Unless you got a real water temp gauge, #1 doesnt owkr.  The stock gauge "overheating" is far too hot and just indicates popped gasket, or danger if you get lucky.

#2 is how i have always done it on street cars.  However, I have known others who had the switch fail and said the fan didn't work so I shy away from this solution nowadays.

#3 is the best solution, and guess what, the most expensive.  Funny how that always works.

X-braces came on Verts and 95 LTWs as part of their "trunk pack".  AKA you picked up your 95 M3 LTW with an x-brace, wing, dual pickup oil pan, and a couple other things in the trunk.  Installing it was on you or the dealer after the fact.  It is a noticeable and immediate difference on any car I have ever driven and saves your oil pan during oopsies off track (apparent when you see tons of these x-braces with huge gouge marks from hitting things)

So do you install a bung in your thermostat housing or radiator to run the fan? Or do you have it run with the aux fan?