K & N
 

I just installed a K & N in my 06' X3 using stock air box. I have K & N CAI on my 97 M3 and really like the slight change in power delivery + MPG. Has anybody used K & N on their X3? If so did you see any improvement in power or MPG?

The extra noise has you believing you are getting extra power. Enjoy, K&N loves ya.

ab installed a drop in K&N a couple of years ago.
he says any hp increase would be almost impossible to measure however we have noticed a few (very few) tenths improvement in mileage + he's cleaned it a couple of times so it's getting close to paying for itself

can't say much about noise because i CAN'T hear anything over these %^*& squawking doors!

jb

Update. I just drove 100 miles of highway today at 70 mph indicated and saw 2 mpg jump on my computer (23.2 to 25.3). I had been averaging about 23 on the highway for the last few months. I need more time to track change in MPG. There is no additional noise from the K & N replacement filter using the stock air box.

I HAVE USED IT IN PREVIOUS CARS, IT DOES SOMETHING FOR SURE. I PLANNING TO INSTALL IT SOON.
WHICH IS THE COST IN UNITED STATES ???

our computer is very (VERY) optimistic it always shows .9 to 1.9 BETTER mpg :rofl: than manual calculation, jb calculates and documents every tank computer and manual. the computer has only got it right once!!

ab

K&n
 

Jannis, cost was $49 US.

The OBC uses a flow meter to calculate MPG and if anything it is consistent--manually dividing the gallons at the pump into the miles traveled is not very accurate--every pump nozzle shuts off at different times and you never get a fillup unless you overflow the tank--and that will trip a fault in the computer. Also the gas from the underground tank may be cold--pump it into your tank and it will warm up and expand--
BTW this is the 21st century--computers replaced pencil and paper ;)

what ???????????

the cost in europe for a K&N filter is usd 180 !!!

are you sure ?

Cost
 

Jannis, the cost in US $ was correct. I purchased at "Auto Zone". Maybe I should pack one in my luggage this summer and bring it to Europe for you:rofl: We are thinking of Greece this year, but I may go back to Munchen for some more of that great beer!

Bis spüter!
Mark

hhmm lets see if i understand :nanana:

our hand held GPS says we've traveled 100 miles and the OBC says 105 = OBC correct

our hand held calculator says 20 MPG calculated by using OBC provided miles divided by gals provided by pump, OBC says 21.5 MPG = OBC correct

these calculations have been made for every (almost) tank of gas for 40000 miles = OBC correct

ab

we paid $48.00 (US) 3 years ago.

ab

This would hold true on a flat road--stretch out a length of ribbon 3 foot long and pretend it is a road--then put some gentle curves in it and measure it--it got shorter if measured on a straight line--this is what the GPS sees--if you are in hills the car OBC measures actual surface distance traveled up and down the hills--the GPS sees a coordinate location by triangulating two locations from the satellite and will usually show shorter distance. I noticed this with my portable Garmin in 2 different cars--the Garman always posted less miles. And again using the gallons shown on the gas pump is very inaccurate as stated in my last post--no two pumps are the same on shutoff levels--can vary up to 1 gallon--and who knows the accuracy of the pump flow meter itself. Although automakers may fudge the parameters in their favor slightly--the fact still remains that the flow meter and OBC will be very consistent compared to reading gas pumps. Happy motoring

:hijack:

HUH???? :confused:

the topic changed?

This:


...has nothing to do with K&N filters. Hence, ":hijack:"

I have one in my '04 3.0, with no noticeable increase in intake honk. I got it for $39 online somewhere. I've been using K&N's on bikes and cars since the mid-70's. My experience has been that they do help MPG slightly ( ~.5 - 1.5%). I've also had Autothority CAI rigs (with conical K&N filters) on an '87 325is and a '96 328is and both were good for +1-2 mpg, better throttle response, a lovely intake noise, and a small seat-of-the-pants performance gain. YMMV

SURE THANKS !!!! SEE YOU HERE