hacker-pschorr

...and, if it floats it must weigh the same as a duck, therefore the K&N filters were created by a witch!

Tom. M

Nope..more like:

Porsche put the screens in the MAF to add turbulence to the airflow
K&N put screens in the filter to add turbulence to the airflow

Therefore:
Porsche = K&N

Are you saying that Porsche is bad???

John Speake

Tom,
My understanding is that the screens are there to promote a laminar air flow.....

I do agree with your other points. However, removing the screens does mess up the mapping of the LH ECU because the MAf will measure differently to when the screens are in place, this change may benefit your particualr engine, or may degrade power a little.

Every car is different, especially at the age they are now.

heinrich

Did you see an increase or a decrease when you removed the MAF wire screens?

Mongo

It cost more to fill the 928's gas tank up than to buy an air filter that is $30 ONCE A YEAR. No K&N for me.

Tom. M

Don't remember ..which probably means I didn't see a gain or a loss either way.....although..only one of my screens is off...and I do recall seeing dyno runs where 10 or so HP was gained without the screens..

Do I believe that any of this hocus pocus?..Nah...I use the K&N because I can clean and re-install...

Just like Mark K or Porken quoting dyno numbers...they all sure look good on paper...but when I take on Ken at the track..I'll make sure its a hot and sticky day with a track temp around 120 degrees F..

Bill Ball

K&N filters have less than half the surface area of a stock filter. I would think flowing the same or more air through 1/2 or less the surface area means more crap has to get through.

worf928

So, if the filter sinks when thrown in a lake it's a stock filter. But, if it floats it's a K&N.

Got it.

PorKen

I find your lack of faith...disturbing.


But Tom's right, in my limited experience, I've found that inlet air temperature affects dyno results, considerably.

If you show a loss or gain with or without the airbox lid, or K&N, versus stock, you need to show the A/F graph, too. Because the stock LH chips are rich up top, anything that leans out the MAF signal, with turbulence, or restriction, or ?, will raise the HP peak. Taking off the lid leaned out my A/F ratio a tad, and I made 316rwhp (versus 312) with the stock filter, but, IIRC, the torque peak was lowered (rich for TQ, lean for HP).

Larry Velk

Mustang airplanes had an "icing screen" in the intake before the carb. If it clogged heated air was routed in. I'm certainly not sure of whether this was to stabilize air flow or what. The guy I knew who was a Mustang mechanic is, unfortunately, long dead. In any case, a flow restriction in the form of a screen isn't a new idea.

FlyingDog

If they both float, the K&N is the one leaving a Valdez-like oil slick killing all the migratory sea birds.

mark kibort

No worries.
Hey, we are all wierd birds here!
mk

Bill51sdr

...only if incorrectly oiled!

the flyin' scotsman

witch to wood that burns; wood to duck that float hence weight of duck to witch = witch

for a street car any hp gain (if there is indeed any) with a non stock filter is somewhat negated with the first bag of groceries or ones most svelte passenger........weight is now the most hp robbing factor and unless your racing the car............who cares.

Vlocity

Well since this thread has now deteriorated to complete tom foolery,

I only use enviromentally friendly Nivea products that I find in my wife's night stand so if a duck swims through the wake it naturally moisturizes and repairs damaged well uh...skin.

So what we really need is a hot screen with something like 110 volts, that way any oil would be vaporized and the heated air would stabilze any dyno factors for back to back runs.

Ken