My C55 dyno results - stock filters vs. K&N's
04-23-2008, 04:48 PM
#26
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2015 GL550, 2019 GLC350e
the best thing about K&N filters are you don't have to buy a filter ever again just keep it clean and oiled correctly. over time they will pay for themselves. For me going to aftermarket lifetime filters was a no-brainer any HP gains are just gravy. K&N has been around for a long long time and to stay in the game that long you have to have a good product. go to your local auto zone or parts store and get some k&n filters (you need to buy two) you wont regret it aftermarket filters are a big upgrade over stock.
Now the interesting part will be for me to see what condition my filters are in when I open it up to replace it with the K&Ns.
04-23-2008, 05:08 PM
#27
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https://mbworld.org/forums/showpost....53&postcount=1
https://mbworld.org/forums/showpost....1&postcount=24
04-29-2008, 03:57 PM
#29
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2015 GL550, 2019 GLC350e
You may find some debris in there…
https://mbworld.org/forums/showpost....53&postcount=1
https://mbworld.org/forums/showpost....1&postcount=24
https://mbworld.org/forums/showpost....53&postcount=1
https://mbworld.org/forums/showpost....1&postcount=24
Here's what I've noticed so far:
MPG increased from 20.8 to 21.3 from my daily commute of 53 miles (avg speed of 50 mph)
Less kick down from the transmission. Lately I've been noticing that the transmission needs to kick down to a lower gear as I'm not getting the same quick response from the engine (happened right around 50K miles)
A tiny bit louder but it could be my imagination
Overall not bad for a $100 investment
04-29-2008, 04:08 PM
#30
MBWorld Fanatic!
That might be the case if the dyno shop uses a WalMart box fan. With the hood open and a real fan, the engine is ingesting room temperature air, not engine compartment air. The first photo is a picture of a CLK430 that SoCalCLK used to own - note the fan.
Cars that run boost generate so much heat that 20,000+ CFM fans are required. Regardless of the airbox, a dyno shop should have a fan capable of proper airflow. Without it, the car will run hot and the dyno numbers come in low.
Cars that run boost generate so much heat that 20,000+ CFM fans are required. Regardless of the airbox, a dyno shop should have a fan capable of proper airflow. Without it, the car will run hot and the dyno numbers come in low.
04-29-2008, 07:29 PM
#31
You may find some debris in there…
https://mbworld.org/forums/showpost....53&postcount=1
https://mbworld.org/forums/showpost....1&postcount=24
https://mbworld.org/forums/showpost....53&postcount=1
https://mbworld.org/forums/showpost....1&postcount=24
