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

[Radekxpl]

Deleted stock fans, SPAL 2082 puller on the N15 aluminum brackets wired to the stock aux controller salvaged from my aux fan. Aux fan curve in the DME pushed to the left such that it’s 100% by 85C (iirc .. I can find this and post back).

You want the 2082 vs the 2049. The former has much better airflow numbers at higher static pressures (e.g. when mounted trying to force air through a radiator). It fits even though it’s thicker mounted to the driver side of the rad. Could be the difference between having problems or not I suppose since people don’t usually say, along with modifying the DME curve appropriately.

I can vouch for this setup, have been running this exact setup last 6 years with 2082 spal and all of the same above accessories, on my heavily tracked car about 20+ days a season with original stock radiator condenser which now has 160k (not something I’m proud of, probably have to change it soon) but just to demonstrate how good of replacement or upgrade this setup is with no downsides over bs parasitic factory fan setup, car easily runs 25min sessions on tracks that have high 200ft + elevation changes without ever getting hot in the last 6 years. If anyone remembers for the og members crowd here I was the original 2082 spal tester and thread creator on the old M3forum about findings fitment of this particular fan on e46 M3.


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[Cronenberged]

https://forums.m3cutters.co.uk/threads/m3-aux-fan-switch-temp-rating.109393/

Here's what I found after a quick search. Back in the day I seem to recall finding more around this, but like I said, it might all be hearsay. Anyways the link shows the DME having 2 maps for the AUX fan, one of which being speed related. Now whether that will affect the cooling is debatable, as I imagine doing 100mph you're pushing plenty of air through the radiators anyways.

Regards

Mine shuts off @120mph

[0-60motorsports]

I cant post pictures since the car is taken apart right now for the engine build but when i get a chance ill take some pics of the parts and wiring separately and explain how I did it.

Aweosme thank you

[PHNX636]

Thats great! Can you please post pics? It sounds like the way i would go as well in the summer.

I cant post pictures since the car is taken apart right now for the engine build but when i get a chance ill take some pics of the parts and wiring separately and explain how I did it.

[sapote]

Sitting stationary in hot weather (~35c+) the temp creeps up. Upon moving, temps drop straight away.

I haven't modified the aux fan curve; something I need to do asap.

I would think with the temp gauge creeping up then fan already at max speed (90% PWM), then how does a modified fan curve help?

[Syfon]

I'm running the mishimoto electric fan off the stock aux fan controller. Both clutch fan & aux fan deleted.

Sitting stationary in hot weather (~35c+) the temp creeps up. Upon moving, temps drop straight away.

I haven't modified the aux fan curve; something I need to do asap.

What software are people using to do so?

[jet_dogg]

I would be very surprised if it was brushless given how old the part is.

[sapote]

You're not wrong, but it runs all the time anyway since I always have AC on. All the new cars use electric fans and they seems to last just fine, no reason to think this fan is any different.

Anyone know if the stock AUX fan has a brushless DC motor or brushed motor? From the way the the fan stops with some cogging in the motion, I think it is brushless.

[Icecream]

This will cause the AUX fan to be working at high duty cycle (running more often), and it will have a shorter life.

You're not wrong, but it runs all the time anyway since I always have AC on. All the new cars use electric fans and they seems to last just fine, no reason to think this fan is any different.

[0-60motorsports]

Also Using a SPAL 2070 fan mounted on N15 brackets With Derale PWM Fan Controller , no issues. Going to be switching over to a PDM soon so that's going to control the fan. The Derale is super nice with a stick on sensor so no need to figure out a temp sensor or use the aux fan controller.

Thats great! Can you please post pics? It sounds like the way i would go as well in the summer.

[PHNX636]

Also Using a SPAL 2070 fan mounted on N15 brackets With Derale PWM Fan Controller , no issues. Going to be switching over to a PDM soon so that's going to control the fan. The Derale is super nice with a stick on sensor so no need to figure out a temp sensor or use the aux fan controller.

[sapote]

I ran without a fan for a year in LA heat and traffic without a problem,

This will cause the AUX fan to be working at high duty cycle (running more often), and it will have a shorter life.

[0-60motorsports]

Deleted stock fans, SPAL 2082 puller on the N15 aluminum brackets wired to the stock aux controller salvaged from my aux fan. Aux fan curve in the DME pushed to the left such that it’s 100% by 85C (iirc .. I can find this and post back).

You want the 2082 vs the 2049. The former has much better airflow numbers at higher static pressures (e.g. when mounted trying to force air through a radiator). It fits even though it’s thicker mounted to the driver side of the rad. Could be the difference between having problems or not I suppose since people don’t usually say, along with modifying the DME curve appropriately.

Thanks for the info. I’ll keep it in mind for when my clutch fan goes out.

[repoman89]

Which fan setup and controller did you use?

Deleted stock fans, SPAL 2082 puller on the N15 aluminum brackets wired to the stock aux controller salvaged from my aux fan. Aux fan curve in the DME pushed to the left such that it’s 100% by 85C (iirc .. I can find this and post back).

You want the 2082 vs the 2049. The former has much better airflow numbers at higher static pressures (e.g. when mounted trying to force air through a radiator). It fits even though it’s thicker mounted to the driver side of the rad. Could be the difference between having problems or not I suppose since people don’t usually say, along with modifying the DME curve appropriately.

[0-60motorsports]

It keeps up just fine including cooling the car down while parked after thrashing it for 20 minute track sessions *shrug* but ok. I had it on all last summer on a 16 year old cooling system so no enjoyment for you. There was one day when half my local group with stock fan setups was complaining about having to turn off their AC while idling while mine behaved just fine.

I do use the high pressure / high flow thicker Spal fan on the brackets that keep it within a couple mm from the rad fins.

Which fan setup and controller did you use?