Upgraded oil pans

Nov 18, 2017
780
#21
Havent modified it from original. As far as I can tell the M3 cooling is the way to go. It retains the water to oil transfer but also adds an oil to air cooler as well.
 
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Corporal
Free Vendor
Oct 27, 2016
239
#22
What cooler do you have? Divorcing the trans cooling from the coolant circuit takes quite a bit of surface area to do so at a stand still and no fans.
You'd be surprised how much more efficient air is at cooling than hot coolant :)
 

doublespaces

Administrator
Oct 18, 2016
6,758
AZ
#23
I wish that were true in my case. I've found the coolant to be very good at cooling the trans fluid in various situations, but only up to a certain point obviously and at the expense of coolant temps themselves.

I suppose I will start with one of my cooler upgrades and see how it handles temps, if not then I'd like to add the second one or at least some sort of inline cooler with a fan mounted to the bottom of the car perhaps?
 
Nov 18, 2017
780
#24
I would leave the standard M3 system in place but add another cooler to supplement that setup.
 

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Corporal
Free Vendor
Oct 27, 2016
239
#25
I wish that were true in my case. I've found the coolant to be very good at cooling the trans fluid in various situations, but only up to a certain point obviously and at the expense of coolant temps themselves.

I suppose I will start with one of my cooler upgrades and see how it handles temps, if not then I'd like to add the second one or at least some sort of inline cooler with a fan mounted to the bottom of the car perhaps?
You can attach a fan if needed. From my testing I don't see how this A2A will get anywhere near 200F temps like the stock one does. Coolant is like 220F, so I still don't understand how that cools it LOL.
 
Nov 18, 2017
780
#26
You can attach a fan if needed. From my testing I don't see how this A2A will get anywhere near 200F temps like the stock one does. Coolant is like 220F, so I still don't understand how that cools it LOL.
If you read this, https://bmw.spoolstreet.com/threads/bmw-dct-information.2950/
It explains that(on the M3 at least) that the water to oil cooler is engaged below oil temp of 95 deg C.
This is actually to warm the oil, not cool it.
Above 95 deg C the Oil air works. The reason a lot of coolers on non M vehicles are ineffective is because i dont believe the thermostat is taken into account on these installations. On the non M there is no “cooling” other than what the water to oil can deliver which is less than ideal.
On an M3 however an upgraded cooler itll work because it has a heating AND a cooling cycle. The secret is the the thermosat and its bypass network.
 

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Corporal
Free Vendor
Oct 27, 2016
239
#27
If you read this, https://bmw.spoolstreet.com/threads/bmw-dct-information.2950/
It explains that(on the M3 at least) that the water to oil cooler is engaged below oil temp of 95 deg C.
This is actually to warm the oil, not cool it.
Above 95 deg C the Oil air works. The reason a lot of coolers on non M vehicles are ineffective is because i dont believe the thermostat is taken into account on these installations. On the non M there is no “cooling” other than what the water to oil can deliver which is less than ideal.
On an M3 however an upgraded cooler itll work because it has a heating AND a cooling cycle. The secret is the the thermosat and its bypass network.
Yes, I'm aware it's mostly used for warming the oil at first :) Then after that, not much cooling lol.
 
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