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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old January 22nd, 2018, 17:03   #1
nff405599
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Default Cold Air Intakes

I am new and have been reading the K&M discussions. My question is - is there any intake filter system that will improve fuel mileage?
Thanks,
Butch
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Old January 22nd, 2018, 17:15   #2
MichaelB
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Quote:
Originally Posted by nff405599 View Post
I am new and have been reading the K&M discussions. My question is - is there any intake filter system that will improve fuel mileage?
Thanks,
Butch
Simple answer NO. There is nothing restricting or wrong with the stock filter and intake box. there is no aftermarket intake or filter that will increase the fuel economy of your car. K&M is a joke and if you think not well, waste your money on their product and find out the only thing that happened was to make the money in your wallet go faster.

Last edited by MichaelB; January 22nd, 2018 at 17:17.
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Old January 22nd, 2018, 21:13   #3
JSWTDI09
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Long answer here: http://forums.tdiclub.com/showthread.php?t=485759

Have Fun!

Don
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Old January 31st, 2018, 14:14   #4
Mongler98
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short answer, no. the best fuel econ is with a clean stock air box that the ecu expects and making sure that the MAF stays clean. Check the sticky on cold air intakes please.
any aftermarket air intake other than a Swiss cheese mod on the stock airbox and a cat air filter check is a waste of money and is hurting your engine and you will suffer power loss and bad fuel econ and trash parts like the MAF, engine bearings ect.

http://forums.tdiclub.com/showthread.php?t=290373
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Old January 31st, 2018, 14:15   #5
Mongler98
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for what its worth, the stock air box can handle 250hp no problem
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Old January 31st, 2018, 14:25   #6
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Not sure if the MK5's and 6's have snow screens upstream of the airbox but my Beetle had one mounted sort of inside the front portion of the drivers fender. It was hit and during the repairs we discovered that it was crushed restricting airflow so I took it out and made sure the air inlet is as high as possible.

I would check to see if the screen is plugged with crap and bugs. No need to improve beyond cleaning and making sure the filter is clean and clear.
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Old January 31st, 2018, 14:33   #7
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On a related note, people talked about using a R32 intake snorkle with the stock filter housing, but they appear to be impossible to get now.

Is there any equivalent option if you're pushing performance and seeing intake restriction coming into the filter box?
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Old January 31st, 2018, 14:51   #8
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I was looking at HPA's website and they have some VR6 forced induction kits with a K&N cone. They took out the drivers side headlamp and ran the K&N cone just behind the opening. I guess the added air pressure helps when you are going fast!

This might generate a ticket or a vehicle inspection if used on the street!

Maybe a home made collector could be rigged up with piping to get to the airbox!
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Old January 31st, 2018, 16:05   #9
MichaelB
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Quote:
Originally Posted by nff405599 View Post
I am new and have been reading the K&M discussions. My question is - is there any intake filter system that will improve fuel mileage?
Thanks,
Butch
Quote:
Originally Posted by PB_NB View Post
I was looking at HPA's website and they have some VR6 forced induction kits with a K&N cone. They took out the drivers side headlamp and ran the K&N cone just behind the opening. I guess the added air pressure helps when you are going fast!
This might generate a ticket or a vehicle inspection if used on the street!
Maybe a home made collector could be rigged up with piping to get to the airbox!
Will that Rube Goldberg set up improve fuel economy.? No matter what you do unless you have a really big turbo it will never be starved of air pressure.
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Old January 31st, 2018, 16:16   #10
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Quote:
Originally Posted by PB_NB View Post
I was looking at HPA's website and they have some VR6 forced induction kits with a K&N cone. They took out the drivers side headlamp and ran the K&N cone just behind the opening. I guess the added air pressure helps when you are going fast!

This might generate a ticket or a vehicle inspection if used on the street!

Maybe a home made collector could be rigged up with piping to get to the airbox!

Sounds a little like the Dodge Demon CAI. A tdi with similar arrangement probably wouldn't be banned by the NHRA though .
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Old January 31st, 2018, 16:18   #11
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Sounds a little like the Dodge Demon CAI. A tdi with similar arrangement probably wouldn't be banned by the NHRA though .
What does that have to do with fuel economy?
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Old January 31st, 2018, 16:20   #12
turbobrick240
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Didn't you know? The Dodge Demon is all about fuel economy!
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Old January 31st, 2018, 16:39   #13
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Quote:
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Didn't you know? The Dodge Demon is all about fuel economy!
Sorry I forgot
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Old January 31st, 2018, 22:23   #14
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CAI can improve throttle response and sound but not mpg.
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Old February 1st, 2018, 08:14   #15
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I was witness to a stock air intake test at a tuning shop, and the stock intake is only %5 inefficient.....and the tuner was pretty impressed as it was the first Vw tdi he had done.
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