Carbahn Heat Exchanger

Hit_Apex · 08-07-2023, 04:39 PM

When I learned this was the keystone of Carbahn's S58 warranty my interested was piqued. The unit is an add-on that stacks in a super slick way in front of the stock HE. It looks like a stock piece in that the design and construction matches almost identically - perhaps from the same supplier.

I finally got time to install last weekend. It's one of those boring durability mods that unless you want their stage 2 w/warranty is probably not on your list. For whatever reason it appealed to me. It is expensive, but I bought it during the release pricing so that helped. Installation was well thought out and very straightforward although you do have to trim a few holes in the plastic shroud.

Here are a few pics - hit me up if you have any questions about the install. I drove hard in 90 degree weather and IAT was solid around 59-60. The real value will be on hot track days - especially at higher boost levels.

hellcat2m4 · 08-07-2023, 05:16 PM

IATs were 59-60? Is that celcius? In 90F?

forcefed · 08-07-2023, 06:37 PM

That heat exchanger looks mighty similar to the transmission cooler... hmmm

Hit_Apex · 08-07-2023, 07:25 PM

Quote:

Originally Posted by hellcat2m4

IATs were 59-60? Is that celcius? In 90F?

Fahrenheit via JB4 gauge.

Hit_Apex · 08-07-2023, 07:26 PM

Quote:

Originally Posted by forcefed

That heat exchanger looks mighty similar to the transmission cooler... hmmm

Dimensions are different but yeah, could be same supplier.

somer · 08-08-2023, 07:15 AM

Did you think about going more water than coolant mix in the heat exchanger loop or adding Redline water wetter or similar additive? 30 degrees below ambient seems too good to be true lol.

Wonder if it's possible to request a heat exchanger without their logo on it, lol...

forcefed · 08-08-2023, 09:09 AM

Quote:

Originally Posted by somer

30 degrees below ambient seems too good to be true lol.

That's simply not possible, something got lost in translation.

chris3g · 08-08-2023, 09:44 AM

IAT cannot be 60F in 90F ambient, let alone when driving it hard.

Hit_Apex · 08-08-2023, 09:53 AM

Good call out now that I think about it. I need to take a look at what exactly the JB4 is picking up.

mike@x-ph.com · 08-08-2023, 09:56 AM

Quote:

Originally Posted by Hit_Apex

Good call out now that I think about it. I need to take a look at what exactly the JB4 is picking up.

Let us know what it says
make sure IAT spoofing is not enabled

Hit_Apex · 08-08-2023, 10:12 AM

Quote:

Originally Posted by mike@x-ph.com

Let us know what it says
make sure IAT spoofing is not enabled

Oops. BMS did the configs while on their dyno and for some reason I thought we were only spoofing for map 6. My bad, but I should have known better, lol. Edits to follow…

Mcc420 · 08-09-2023, 09:16 PM

Any updates on the iats?

anakratis · 08-11-2023, 11:53 AM

Looks nice but could do without the Carbahn logo...

Hit_Apex · 08-11-2023, 12:21 PM

Quote:

Originally Posted by anakratis

Looks nice but could do without the Carbahn logo...

LOL, agree - tried to clean it off before installing. The paint isn't aggressive and removes with carb cleaner but even using a small detailer brush I couldn't get at the paint inside the fins. It is much more muted than before and less noticeable when viewed head on.

Hit_Apex · 08-11-2023, 12:24 PM

Quote:

Originally Posted by Mcc420

Any updates on the iats?

Not yet, haven't driven since this post. Maybe this weekend.

Hit_Apex · 08-11-2023, 05:34 PM

Quote:

Originally Posted by somer

Did you think about going more water than coolant mix in the heat exchanger loop or adding Redline water wetter or similar additive? 30 degrees below ambient seems too good to be true lol.

Wonder if it's possible to request a heat exchanger without their logo on it, lol...

I did not think about that but should have. All previous track cars were WW and water only. I wanted to keep it OEM but could have upped the water ratio and added WW. I may do that, I don’t live where freezing is a concern and rather have better thermal transfer.

G80journey · 01-17-2024, 01:20 AM

How does this compared to CSF heat exchanger? It’s over double the price ?

forcefed · 01-17-2024, 06:40 AM

Quote:

Originally Posted by G80journey

How does this compared to CSF heat exchanger? It’s over double the price ?

Unless you're getting the whole carbahn treatment for warranty reasons then get the CSF one.

mike@x-ph.com · 01-17-2024, 10:44 AM

Quote:

Originally Posted by forcefed

Unless you're getting the whole carbahn treatment for warranty reasons then get the CSF one.

+1

somer · 01-17-2024, 04:45 PM

Quote:

Originally Posted by G80journey

How does this compared to CSF heat exchanger? It’s over double the price ?

This is a supplemental heat exchanger, CSF is just a factory drop in replacement.

08-07-2023, 04:39 PM	#1
Hit_Apex Riding the knock sensor 2374 Rep 1,596 Posts Drives: 21 X5MC \| 23 M4CSL Join Date: May 2008 Location: PCH iTrader: (1) Garage List 2021 BMW X5MC [0.00]	When I learned this was the keystone of Carbahn's S58 warranty my interested was piqued. The unit is an add-on that stacks in a super slick way in front of the stock HE. It looks like a stock piece in that the design and construction matches almost identically - perhaps from the same supplier. I finally got time to install last weekend. It's one of those boring durability mods that unless you want their stage 2 w/warranty is probably not on your list. For whatever reason it appealed to me. It is expensive, but I bought it during the release pricing so that helped. Installation was well thought out and very straightforward although you do have to trim a few holes in the plastic shroud. Here are a few pics - hit me up if you have any questions about the install. I drove hard in 90 degree weather and IAT was solid around 59-60. The real value will be on hot track days - especially at higher boost levels. Attached Images __________________
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08-07-2023, 05:16 PM	#2
hellcat2m4 First Lieutenant 227 Rep 336 Posts Drives: 2022 M3 Competition Join Date: Jun 2018 Location: DFW Texas iTrader: (0)	IATs were 59-60? Is that celcius? In 90F?
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08-07-2023, 06:37 PM	#3
forcefed Lieutenant Colonel 2569 Rep 1,932 Posts Drives: . Join Date: Sep 2021 Location: Toronto iTrader: (0)	That heat exchanger looks mighty similar to the transmission cooler... hmmm __________________ 2023 m3 xdrive For sale: M3/M4 Eibach pro kit springs, csl gloss black grill with acc, gloss black lip
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08-08-2023, 07:15 AM	#6
somer Major 972 Rep 1,056 Posts Drives: F10 M5 CP Join Date: Oct 2013 Location: FL iTrader: (0)	Did you think about going more water than coolant mix in the heat exchanger loop or adding Redline water wetter or similar additive? 30 degrees below ambient seems too good to be true lol. Wonder if it's possible to request a heat exchanger without their logo on it, lol...
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08-08-2023, 09:44 AM	#8
chris3g Major 1615 Rep 1,271 Posts Drives: 2023 M3 xdrive Join Date: Jan 2012 Location: NJ iTrader: (4)	IAT cannot be 60F in 90F ambient, let alone when driving it hard.
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08-08-2023, 09:53 AM	#9
Hit_Apex Riding the knock sensor 2374 Rep 1,596 Posts Drives: 21 X5MC \| 23 M4CSL Join Date: May 2008 Location: PCH iTrader: (1) Garage List 2021 BMW X5MC [0.00]	Good call out now that I think about it. I need to take a look at what exactly the JB4 is picking up. __________________
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08-09-2023, 09:16 PM	#12
Mcc420 Captain 475 Rep 608 Posts Drives: G80 M3CX Join Date: Oct 2013 Location: Mtl iTrader: (1) Garage List 2023 g80x [0.00] [0.00]	Any updates on the iats? __________________ G80 Comp, Hcp custom e50, 9.69@141 F90 Comp, Hcp custom e40 meth, 9.76@143, 174ml/h 1/2ml 60-130 5.53 F10 M5, HCP Tune ,BM3, 10:8@137, 166.05 1/2ml. Ig @mcc420
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08-11-2023, 11:53 AM	#13
anakratis Lieutenant 646 Rep 446 Posts Drives: '24 X3M Comp Join Date: Mar 2022 Location: Seattle iTrader: (0) Garage List 2024 BMW X3M Compet ... [0.00]	Looks nice but could do without the Carbahn logo... __________________ 2024 F97 ///X3M COMP [AW/SO] Active Autowerke EL Mid Pipe + Axle-back \| H&R Sport Springs
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01-17-2024, 01:20 AM	#17
G80journey Registered 0 Rep 2 Posts Drives: m3 g80, XM Join Date: Dec 2023 Location: CA iTrader: (0) Garage List 2022 G80 M3 [0.00]	How does this compared to CSF heat exchanger? It’s over double the price ?
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