[ZM2]

Originally Posted by AmuroRay

I'm just reviewing this now in some detail -
If your notes are correct, you're saying the first and second log are CSF vs DO88 Radiators? Same map, different tracks, ambient and different coolant mixture?

That's correct.

Altho, from previous logs I've noticed big cooling system requirement differences b/n tracks with 125-135mph top speeds and those with 145-155mph top speeds. I've also had the CSF setup perform fine with ambient <50F.

So, b/n those and the other different variables bn the logs, I'm not drawing any conclusions.

[bbnks2]

Doesn't make sense that you add that much radiator and aux cores and still can't keep coolant in check. Maybe more dedicated oil cooling would help. I don't see many other cars struggling this hard for temps...

[ZM2]

Originally Posted by bbnks2

Doesn't make sense that you add that much radiator and aux cores and still can't keep coolant in check. Maybe more dedicated oil cooling would help. I don't see many other cars struggling this hard for temps...

I know, it’s like I should start a thread about it.

[AmuroRay]

Reviewing those logs you sent, I have a hard time believing that the CSF products (outside of the intercooler) do anything, and might actually makes things worse.

In fact, I've seen 1 or 2 other users complain about higher temps since adding a CSF radiator.

[ZM2]

We shall see. Next track day will likely be early August.

[TheHunterHofman]

Hi, quickly chiming in here. My review was just on the basis of my own experience (experiencing slightly cooler temps all round), but not based on logs or data. The do88 cooler itself is of very good quality and fitment is on point; would recommend.

[AmuroRay]

Originally Posted by ZM2

We shall see. Next track day will likely be early August.

I think I saw in another thread travel has you too busy to test. Have you had a chance to drive the car on the street with the parts fitted?

[ZM2]

Originally Posted by AmuroRay

I think I saw in another thread travel has you too busy to test. Have you had a chance to drive the car on the street with the parts fitted?

Haven’t. Getting a cpl other things done and told my shop to take their time in case other guys need to make a specific track day.

[AmuroRay]

Went back in time and pulled OG Shark's log:

https://f87.bimmerpost.com/forums/sh...8&postcount=29

Originally Posted by OG Shark

Had my first track time in the M2 this weekend...

'18 M2 6spd
Ohlins RT
AP Racing BBK Front & Rear
CAE Shifter
do88 Intercooler
do88 Radiator & Auxiliary Radiator
do88 Engine Oil Cooler
Fabspeed Downpipe
Bootmod
Hoosier R7 275/35/18 & 295/35/18
Signature Wheel SV501 18x9.5 & 18x10.5 - look awesome on an M2

Full weekend at COTA. Temps were mid 90's with high humidity, pretty brutal. I run DSC off.

https://f87.bimmerpost.com/forums/sh...7&postcount=38

Originally Posted by OG Shark

This was from the 3:00 session Sunday

http://www.bootmod3.net/log?id=5d0fe58cc090c610f32d3815

Pulled temp data for the track (90F+ temps)
https://www.timeanddate.com/weather/...th=6&year=2019

Pretty much the worst case possible in terms of weather:

18 minute session?
16-17PSI
IAT maximum of 160F
Oil temp a maximum of 259F
Coolant temp maximum of 252F

(note - I'm not entirely sure how to read "time" in BM3)
Oil temps from 205F (time stamp 8.5)
1.2 minutes to 230F oil (time stamp 9.7)
3.25 minutes to 240F (timestamp 11.75)

Coolant temps from 200F (time stamp 8.45)
3 minutes to 235F (time stamp 11.45)
4.45 minutes to 240F (time stamp 12.9)

Originally Posted by M2guru

The car: 2018 M2.
BM3 Stage 2
CSF Intercooler
Mosselman thermostat
CSF Oil cooler
Fabspeed high-flow cat
Dorch Stage 1 HPFP
Max Cool BM3

BIR temps 82F
https://www.timeanddate.com/weather/...48502/historic

Datalog

Originally Posted by M2guru

Yes. The data from the video came from the bm3 log. https://bootmod3.net/log?id=64d372f6ae729b71ff8c53c2

18 min session
16 -17PSI
IAT maximum of 153F
Oil temp a maximum of 259F
Coolant temp maximum of 241F

(Oil temps from 205F (time stamp .62 minutes)
.95 minutes to 230F Oil (time stamp 1.57 minutes)
1.38 minutes to 240F oil (time stamp 2 minutes)

Coolant temps from 200F (time stamp .96)
3.54 minutes to 235F (time stamp 4.5)
5.84 minutes to 240F (time stamp 6.8)

[AmuroRay]

If you know how I should interpret the BM3 "time", please let me know and I will update.

Different tracks, and different days - nearly the same state of tune, and similar mods.
Car 1 (OG Shark) showed better resistance to oil temps despite the day being 10F hotter. Could it be that the DO88 does allow more effective heat dissipation despite a thermostat that opens later?


Car 2 (M2guru) Showed better resistance to coolant temps, despite having a stock coolant system. Could Max cooling really add that much headroom? It should be noted that Car 1 peak speeds are 10mph less than car 2.

[M2guru]

Originally Posted by AmuroRay

If you know how I should interpret the BM3 "time", please let me know and I will update.

Different tracks, and different days - nearly the same state of tune, and similar mods.
Car 1 (OG Shark) showed better resistance to oil temps despite the day being 10F hotter. Could it be that the DO88 does allow more effective heat dissipation despite a thermostat that opens later?


Car 2 (M2guru) Showed better resistance to coolant temps, despite having a stock coolant system. Could Max cooling really add that much headroom? It should be noted that Car 1 peak speeds are 10mph less than car 2.

Time was messed up in BM3's log process/information. I told them about it about a month ago and they were very quick to update their app within a couple weeks. It works as you would expect now.

As I have my bumper cover off waiting for the oil cooler to arrive, I have straightened the radiator fins out which I have to say will increase flow by 5-15% - they were pretty bent up. BUT WORSE is the aux coolant radiator. That thing is nearly blocked of all air flow due to the bent fins. The fins are much smaller on the aux radiator. I have "cleaned up" two rows (vertical) by pushing a probe through from the rear side, but the probe is a bit too large (good for the primary radiator, but not as good for the aux). I cannot fit the probe between every fin - have to go every other. I think that even it I cannot find a smaller probe (will look tonight), it still has to be better to air moving through it than around it even if I have "reduced" the number of fins by collapsing every other. I plan to look up prices for the aux radiator it's so bad...

I am starting to be concerned that I have made too many changes and won't know which had the largest impact: CSF to d088 oil cooler, straightening radiator fins, and straightening the aux radiator fins.

[F87source]

Just wanted to add something. The m2 doesn't have the aux radiator pump like the m235i, and you technically can't just retrofit that aux pump because the car cannot control it, and coding cannot enable it. However, I talked to Enabled about this and he believes he can enable the aux water pump via DME tuning, by porting over the controls from the M235i. So if you guys want to give it ago and have like stock DME controlled aux waterpump to help that aux radiator out, then I think it is doable. You just need to retrofit the parts, and talk to Enabled to get the tuning done.

[M2guru]

Originally Posted by F87source

Just wanted to add something. The m2 doesn't have the aux radiator pump like the m235i, and you technically can't just retrofit that aux pump because the car cannot control it, and coding cannot enable it. However, I talked to Enabled about this and he believes he can enable the aux water pump via DME tuning, by porting over the controls from the M235i. So if you guys want to give it ago and have like stock DME controlled aux waterpump to help that aux radiator out, then I think it is doable. You just need to retrofit the parts, and talk to Enabled to get the tuning done.

Do you have information about how it works in stock form on the M2? I'd be OK hooking up a switch to turn the m235i aux pump on/off if that's all it takes - I wouldn't need DME controlled. Interested!

[AmuroRay]

Originally Posted by M2guru

Time was messed up in BM3's log process/information. I told them about it about a month ago and they were very quick to update their app within a couple weeks. It works as you would expect now.

As I have my bumper cover off waiting for the oil cooler to arrive, I have straightened the radiator fins out which I have to say will increase flow by 5-15% - they were pretty bent up. BUT WORSE is the aux coolant radiator. That thing is nearly blocked of all air flow due to the bent fins. The fins are much smaller on the aux radiator. I have "cleaned up" two rows (vertical) by pushing a probe through from the rear side, but the probe is a bit too large (good for the primary radiator, but not as good for the aux). I cannot fit the probe between every fin - have to go every other. I think that even it I cannot find a smaller probe (will look tonight), it still has to be better to air moving through it than around it even if I have "reduced" the number of fins by collapsing every other. I plan to look up prices for the aux radiator it's so bad...

I am starting to be concerned that I have made too many changes and won't know which had the largest impact: CSF to d088 oil cooler, straightening radiator fins, and straightening the aux radiator fins.

https://www.summitracing.com/search/...ator-fin-combs
use this instead - for high density fin packs. you'll have to measure the fins per inc though.

Your coolant temperatures were fine though, max cool combined with the lower temp thermostat kept you at 242F? maximum, which is great considering you have done zero work on the coolant side.

My theory is the oil's increased headroom is helping keep the coolant side happy. I would personally see how the oil cooler alone does before doing anything else.

[M2guru]

Originally Posted by AmuroRay

https://www.summitracing.com/search/...ator-fin-combs
use this instead - for high density fin packs. you'll have to measure the fins per inc though.

Thanks for the link. The fins from the front side are so messed up, I don't even think I can get the comb in there. That's one reason I was poking it from the back side. As I do that, there are fins falling out the front they're so damaged. Here is a video of what I was doing:

[ZM2]

Originally Posted by M2guru

Thanks for the link. The fins from the front side are so messed up, I don't even think I can get the comb in there. That's one reason I was poking it from the back side. As I do that, there are fins falling out the front they're so damaged. Here is a video of what I was doing:

!!!!!!!!! Wow.

[M2guru]

Originally Posted by ZM2

!!!!!!!!! Wow.

YA! Only 30,000 miles. Two Minnesota winters (the first two) on a 2018 M2 (got in 2017).

[AmuroRay]

Originally Posted by M2guru

Thanks for the link. The fins from the front side are so messed up, I don't even think I can get the comb in there. That's one reason I was poking it from the back side. As I do that, there are fins falling out the front they're so damaged. Here is a video of what I was doing:

I saw your youtube short, and I don't have the patience. It's also like 95F here to the heat is crazy.

[M2guru]

Originally Posted by AmuroRay

I saw your youtube short, and I don't have the patience. It's also like 95F here to the heat is crazy.

Did the radiator over three days. The aux cooler...I am still not sure if I will continue or find a thinner tool to try. Either way...I'll probably continue. When it get's bad again...I'll be upgrading.

[M2guru]

One other thing...It doesn't seem possible to straighten the fins of the CSF intercooler. They seem offset front to back. And the fins are not the same thin aluminum as the factory pieces (mine is painted?/anodized? black which may also impact the stiffness). For my IATs...I am thinking that the intercooler is a disposable item - it seems packed with bugs and sand/rocks. Money wants to jump out of my pockets it seems...

[ZM2]

Originally Posted by M2guru

One other thing...It doesn't seem possible to straighten the fins of the CSF intercooler. They seem offset front to back. And the fins are not the same thin aluminum as the factory pieces (mine is painted?/anodized? black which may also impact the stiffness). For my IATs...I am thinking that the intercooler is a disposable item - it seems packed with bugs and sand/rocks. Money wants to jump out of my pockets it seems...

While the do88 main radiator, aux radiator, and oil cooler seem to be the way to go vs CSF (need a bit more data to confirm), AmuroRay post with OG Shark’s IATs and the do88 IC show it’s not enough of a gain over the CSF IC.

But, as I said in your other thread, once you solve the IAT problem, the added power will make the oil & coolant temp problem even worse.

The goal we’re both working towards is what is the right combo of hardware (and tune) that will balance & control temps in all the systems on hot track days, and we still need more experimenting and data.

I may be able to get to the track next week, we’ll see!

[AmuroRay]

Honestly, if you're upgrading I would do the VRSF Race or MAD race - you'll need the M235i Cross reinforcement though. While it's out, wrap the charge pipe with reflective tape (use something high quality) and you can even add it to parts of the intercooler.

Finally, you should consider a freer flowing inlet/intake (lowers WGDC, turbo heat, and IATs as a whole) and/or wrapping your box with the reflective tape.

Check Jeremyman's review of the the M2 airbox with an open intake:.
https://f30.bimmerpost.com/forums/sh....php?t=1765289


I'll also note that there is a member here with a front mounted intake that noted a a substantial reduction in IATs:

https://f87.bimmerpost.com/forums/sh....php?t=1944685

Originally Posted by neonbrown

I don't have logs from previous days so I'm just going based off reviewing track videos where I have my p3 gauge monitoring IATs.

(Typically I have my oil temps on instrument cluster, and p3 gauge on IATs)

In may 2022 on a 94 F day I reached over 135 F in IATs on track.

Fast forward to July first test day with the intake, 104 F high of the day. IATs stayed stable around 125 degrees.

I have videos on my IG page @dtx.m2