Clutch Fan Delete Help, Car starts getting hot in drive throughs.

[Mr.wReckless]

From my understanding the OEM AUX fan won't have the ability to run the e-fan at full capacity. You're better off getting a proper controller IMO. I did run your setup for a summer, but the temps up here in the arctic aren't that great even during summer.

I doubt the fan shroud will make a massive difference. You're probably better off blowing out your radiators from debris etc too. Also, to my understanding, not having the front pusher fan + A/C isn't a good combo as when you're low on speed there's not enough airflow to cool down the A/C heat exchanger, so you're running a risk of dumping your a/c gass to atmosphere due to the heat leading to over-pressure.

My advice is clear out your radiators, alternatively get a new one or an aftermarket upgrade, as well as fit a proper fan controller.

Regards

[repoman89]

Does ECU Worx have an interface for changing the aux fan curve now? Cool if so. I modified mine with TunerPro, don’t think ECUWorx had anything but a checkbox for Z4M fan curves at the time which didn’t work — I have the same fan setup as you installed early last year. You should change the curve so the fan is on 100% by 85C at maximum IIRC. I might lower my threshold a little more even. My temp gets up to the middle in warm weather if the car is stopped and idling, which the OEM setup doesn’t do.

You might need a fresh OEM radiator as well with this setup if yours is getting old.

[Rekpoint]

Hey guys, It's the middle of winter in Wisconsin but I need to tackle this right away in the spring so I can enjoy the car worry-free when I take the trip to the Tail this year.
My E46 m3 has a clutch fan delete with a SPAL fan E fan in its place using the AUX fan controller. No AUX fan either.

The car starts to creep up in temp in drive-throughs in the summer at 70+ degrees outside or if the car is not moving. If I blast the heat it usually goes down unless its 85+ outside. When stopped I cant run AC either or else the temp will also raise.
The car does NOT have a fan shroud installed and I am planning on installing the OEM one around the E fan in the spring.

Does anyone else with the same or similar setup have the same issues and have a suggestion?
Should I be messing with the AUX fan curves through ECU Worx?