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MECHANICALS With a 30 year-old automobile, there will always be discussion here - maintenance, modifications and mechanicals.

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  #16  
Old 16th January 2015, 09:54 PM
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Andrew280SEL Andrew280SEL is offline
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Default Re: Ineffective Air Cleaners

Interesting about the K&N filters vs stock. Probably not a bad thing, as an aftermarket unit might look a bit odd on a Benz
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  #17  
Old 17th January 2015, 11:08 PM
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Default Re: Ineffective Air Cleaners

I think you guys have missed the point! My observation was that the hump in the middle of the housing to clear the divider is effectively blocking 1/3 of the element surface area!!

The design does not draw air from the top of the engine but along side it, above the exhaust manifold (which is probably worse)! Cold air is definitely worth the effort and on a 6.9 there are several options. Something interesting which I forgot about (until I saw one today) is the RH guard intake duct on a W124 diesel....

I've heard the same about K&N filters and the quality isn't as good as a MB or OEM one.
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  #18  
Old 17th January 2015, 11:13 PM
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Default Re: Ineffective Air Cleaners

Here's a pic:
Attached Images
File Type: jpg 123403549716242004101948PM.JPG (39.1 KB, 11 views)
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #19  
Old 18th January 2015, 06:14 AM
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Default Re: Ineffective Air Cleaners

The best conversion I have seen was to go the other way and draw the air from the ducting/grill below the windshield. The air cleaner was ducted into the firewall, allowing it to draw down cold air from the grill.
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  #20  
Old 19th January 2015, 09:24 PM
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Default Re: Ineffective Air Cleaners

Ahhh yes but that involves a structural mod which would require approval from an Engineer
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #21  
Old 7th August 2019, 04:12 PM
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Default Re: Ineffective Air Cleaners

4 years 7 months since I felt this was an issue and it's finally be proven true on the dyno by Carobu!!! And rather than make a lot of changes to the standard assemblies, I intend to use one from a W140. But even that may need some (more minor) custom mods....

Oh and apparently the air valve baffle (stopper bridge) also restricts air flow.
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)

Last edited by Oversize; 7th August 2019 at 04:15 PM.
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  #22  
Old 7th August 2019, 04:16 PM
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Default Re: Ineffective Air Cleaners





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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #23  
Old 9th August 2019, 06:43 PM
sean sherry sean sherry is offline
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Default Re: Ineffective Air Cleaners

Been chasing knowledge about Mercedes C Class W204 Air Filters which are as good as they come. No advantage fitting K & N washable Filter
Biggest improvement has been resetting The ECU and the TCU back to how they left the Factory. I now have a part throttle downshift, crisper upshifts and responsive Throttle. I guess Mercedes know that they are doing !!!!
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  #24  
Old 10th August 2019, 09:22 AM
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Default Re: Ineffective Air Cleaners

They do NOW, but premerger with AMG I think they were somewhat confused. Seems like divisions of marketing, bean counters & engineering weren’t getting along.

I think in some ways they down-specced the 6.9 so it wouldn’t take sales from the 600 which was already selling at a loss apparently.

How else can you explain the std airfilter without cold air, a tiny throttle, tiny exhaust outlets, manual seats & vinyl without timber on the door cards??

Oh and the title of this thread could be better... The airfilter was great; what it was mounted in was not.
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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)

Last edited by Oversize; 10th August 2019 at 09:56 AM.
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