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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Black intercooler vs. silver intercooler



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      06-20-2014, 05:59 PM   #1
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Black intercooler vs. silver intercooler

Interesting MCM video...

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      06-20-2014, 06:17 PM   #2
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Very cool. Thanks for sharing....good thing I think a black inter cooler looks just as cool as chrome.
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      06-20-2014, 06:19 PM   #3
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      06-20-2014, 06:54 PM   #4
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This is the stupidest video I've ever seen.
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      06-20-2014, 07:10 PM   #5
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Quote:
Originally Posted by Ingeniator View Post
This is the stupidest video I've ever seen.
This is the whole theme of their youtube channel, they don't take themselves seriously. You would appreciate it if you knew what Mighty Car Mods is...
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      06-20-2014, 07:16 PM   #6
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Quote:
Originally Posted by Gizm0 View Post
This is the whole theme of their youtube channel, they don't take themselves seriously. You would appreciate it if you knew what Mighty Car Mods is...
Is it a parody car show? Because that is the only thing that makes sense. Painting your intercooler will significantly effect overall convection cooling. You saw a ~3*C loss of efficiency with the little breeze they were using. Also if you want a black intercooler pay the bit extra and anodize it. At least that will be better than paint. You will see a 0 IAT benefit from this mod under load.
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      06-20-2014, 07:25 PM   #7
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I've seen the other videos they've done. Pretty funny stuff
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      06-20-2014, 07:32 PM   #8
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Quote:
Originally Posted by Ingeniator View Post
Is it a parody car show? Because that is the only thing that makes sense. Painting your intercooler will significantly effect overall convection cooling. You saw a ~3*C loss of efficiency with the little breeze they were using. Also if you want a black intercooler pay the bit extra and anodize it. At least that will be better than paint. You will see a 0 IAT benefit from this mod under load.
Great mod for the track though... Your IC doesn't heat soak as much while waiting to launch...
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      06-20-2014, 07:34 PM   #9
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Great mod for the track though... Your IC doesn't heat soak as much while waiting to launch...
Your turbo's shouldn't be spooling at idle so no heat of compression. There is no performance benefit.
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      06-20-2014, 07:48 PM   #10
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Originally Posted by Ingeniator View Post
Your turbo's shouldn't be spooling at idle so no heat of compression. There is no performance benefit.
I beg to differ... Air coming on the hot side of the IC is hotter than the ambient temperature at idle, even with no load from the turbos, so heat loss through convection will decrease the IAT at idle with a black IC.
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      06-20-2014, 08:06 PM   #11
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Quote:
Originally Posted by Gizm0 View Post
I beg to differ... Air coming on the hot side of the IC is hotter than the ambient temperature at idle, even with no load from the turbos, so heat loss through convection will decrease the IAT at idle with a black IC.
WellYou will pick up some heat from the exhaust gasses. However the delta improvement isn't via convection but thermal radiation. It should be noted that paint would not be the optimal coating to improve the emissivity. Like I said if you want you can anodize the intercooler. You will also see little improvement if the material has a matte finish as significant change in emissivity outside of direct sunlight is only seen with polished metals.
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      06-20-2014, 11:57 PM   #12
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I chose to install a black Mishimoto FMIC because I wanted it to be less noticeable behind the grill, which it is.
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      07-07-2014, 07:36 AM   #13
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Black Intercoolers - Mythbusting Mighty Car Mods:
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      07-07-2014, 08:20 AM   #14
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Quote:
Originally Posted by PeteA View Post
Black Intercoolers - Mythbusting Mighty Car Mods
Great video! Thanks!
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      07-07-2014, 10:49 AM   #15
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Quote:
Originally Posted by PeteA View Post
Black Intercoolers - Mythbusting Mighty Car Mods:
Nice find. That was the same conclusion I came to as well. Good to see someone bothered to explain why MCM was wrong is so much detail.
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      07-07-2014, 10:57 AM   #16
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...and you shouldn't paint your intercoolers anyway, that's why the highest quality intercoolers offer anodizing.
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      07-07-2014, 10:59 AM   #17
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I got an anodized black intercooler so it didn't stand out, I'm staying stock appearance. Anybody that looks for performance reasons for/against is barking up the wrong tree.
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      07-07-2014, 11:20 AM   #18
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Interesting.

The main point of disagreement is the 100 degree versus 97 degree Celsius temperature difference when external airflow is applied. The affirmative side dismissed the difference as negligible while the negative side used the difference at face value to mathematically support his hypothesis.

But there are issues with either side drawing an immediate conclusion from a single test:

1) The accuracy of the thermistors and digital thermometer (manufacturer lists its Digitech QM1601 Thermocouple Thermometer having an accuracy within 0.5%) were not deliberately factored into the equations by either side which could have a profound impact on the measured temperatures, and certainly with the negative's side of mathematical analysis as the propagation of errors could wholly upset his calculated results.

2) Multiple testing to determine the mean, average, and mode, as well as the standard deviation. This would have allowed us to understand if the 3 degree temperature difference was repeatable and if it was within the standard deviation to ascertain if there truly is a temperature difference either way. The affirmative team immediately assumed the difference was within the standard deviation/error and therefore dismissed it as inconsequential.

Regardless, I would certainly go the route of anodizing over paint if I wanted a black intercooler.
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      07-07-2014, 11:33 AM   #19
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Quote:
Originally Posted by Augster View Post
Interesting.

The main point of disagreement is the 100 degree versus 97 degree Celsius temperature difference when external airflow is applied. The affirmative side dismissed the difference as negligible while the negative side used the difference at face value to mathematically support his hypothesis.

But there are issues with either side drawing an immediate conclusion from a single test:

1) The accuracy of the thermistors and digital thermometer (manufacturer lists its Digitech QM1601 Thermocouple Thermometer having an accuracy within 0.5%) were not deliberately factored into the equations by either side which could have a profound impact on the measured temperatures, and certainly with the negative's side of mathematical analysis as the propagation of errors could wholly upset his calculated results.

2) Multiple testing to determine the mean, average, and mode, as well as the standard deviation. This would have allowed us to understand if the 3 degree temperature difference was repeatable and if it was within the standard deviation to ascertain if there truly is a temperature difference either way. The affirmative team immediately assumed the difference was within the standard deviation/error and therefore dismissed it as inconsequential.

Regardless, I would certainly go the route of anodizing over paint if I wanted a black intercooler.
I wouldn't really call the mythbusted video a mathematical analysis. He just used firm thermodynamic theory. Like I had stated above. As a result of all the drawbacks that the mythbusted video states mainly the reduction in mass airflow and addition of the insulating layer you will see a progressively higher delta iat between the two intercoolers as outside air speed increases. The MCM guys did an alright job keeping the fins clear as they painted it. Joe blow with the spray can through the bumper is going to have terrible results from this.
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      07-07-2014, 11:42 AM   #20
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Quote:
Originally Posted by Ingeniator View Post
I wouldn't really call the mythbusted video a mathematical analysis. He just used firm thermodynamic theory.
Exactly, using assumptions with no mathematically analysis, while the negative side used pure mathematically analysis but without consideration of potential errors in measurement equipment and multiple measurements to establish statistical data from which to base mathematically analysis on to begin with.

Not favoring either party's viewpoint, but pointing out flaws in their analyses that could be used as arguments questioning their conclusions.

And the airflow method utilized didn't seem very effective by looking at the size of the fan and its placement distance-wise from the intercooler, which I doubt is representative of potential airflow of speeds greater than 10 MPH.

But the basics of determining the true effectiveness of heat exchanger coating are provided by both parties that could be used to build a better testing regimen to answer the hypothesis conclusively.
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      07-07-2014, 11:43 AM   #21
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Quote:
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Exactly, using assumptions with no mathematically analysis.
Ok then you can go paint your intercooler. Obviously your not going to get this.
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      07-07-2014, 11:52 AM   #22
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Quote:
Originally Posted by Ingeniator View Post
Ok then you can go paint your intercooler. Obviously your not going to get this.
Obviously, you have no idea what I believe or understand, do you, as you are obviously not going to get this.
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