Time with the car and have some questions.

[z06psi]

Air in and air out. The MAF is the air meter and ECU meters the fuel based off the amount of air density coming in to a certain point. Small changes in the intake tract and exhaust the ECU will adjust accordingly. A lot of the tuning shops will mess with timing and shift points to affect performance until you get into internal engine mods or forced induction. A dry shot of nitrous flowing across the MAF will induce more fuel into the cylinder until the inkector reaches its maxed tuned duty cycle controlled by the ECU. Would love to know the rating on our injectors. Since there is no room in the engine comparment for a supercharger or turbo(s) then nitrous seems as a great alternative when used correctly.

[beep-beep]

Originally Posted by z06psi

Air in and air out. The MAF is the air meter and ECU meters the fuel based off the amount of air density coming in to a certain point. Small changes in the intake tract and exhaust the ECU will adjust accordingly. A lot of the tuning shops will mess with timing and shift points to affect performance until you get into internal engine mods or forced induction.

A dry shot of nitrous flowing across the MAF will induce more fuel into the cylinder until the inkector reaches its maxed tuned duty cycle controlled by the ECU. Would love to know the rating on our injectors.

Since there is no room in the engine comparment for a supercharger or turbo(s) then nitrous seems as a great alternative when used correctly.

You own one of the best german cars with very advanced engine. for the sake of pit what possessed you to put k&n filter designed for old carbureted cars on it?
If you really want to get maximum from it: spend money on maintenance. Buy designated winter and summer tires and use 17” rims.
if you still have 2g left - take audi performance driving school.the will teach you how to make tires squeal.

[z06psi]

On the K&N point. Are you referring to the end not having a filter area? or the material?

It is being maintained as per manufacturer schedule and specifications.

I live in Hawaii so winter tires are not needed but I am going to order some OEM take off rims and some stickier rubber in the future for SOLO events to have some fun.

Advanced? Maybe. h.p./liter is not all that great in my S6. Now the R8GT 5.2 is a different story.

[SchwarzS6]

If you do some research on K&N filters (other than the K&N information) you will find that in many studies the K&N are no better and perhaps worse than paper filters. Probably not enough difference to matter as long as you do not drive in very dusty conditions but never the less, why bother? The paper filters in the air box are quite efficient. Take a look at the size of the cylindrical OEM filter. It is much larger than most of the K&N "Cold Air Kit" filters.

The air box does contain a demand operated flap which can draw estra air from the wheel well area if necessary. See page 39 of this link.

http://dl.dropbox.com/u/14739987/Aud...20Training.pdf

For noise control there is a resonating chamber in the air tube between the filter box and the throttle body.

I still have to believe that the engineers at Audi did whatever was necessary to create an efficient intake and that these after market solutions, while looking nice, are no better.

[beep-beep]

Originally Posted by z06psi

On the K&N point. Are you referring to the end not having a filter area? or the material?

I was referring to the whole idea of buying a car, which was very meticulously designed by a large team of engineers with huge experience, tons of research, computer models, test stands, outdoors tests, etc. And all they want is to get more power to beat BMW.

And you have K&N folks who invented their sponge filter long time ago and try to fit it on new cars. They do not have much research. All they got is a marketing guy. And you believe that the K&N filter somehow would do better job then bunch of German engineers.

Did you know for example, that the intake works as resonator to use acoustic compression and pump more air into the engine (like a little supercharger). There is even a solenoid, which changes the length of the intake at different speed to match the acoustic resonance with the frequency of the opened valves.
Now you change the airbox and the whole resonance is shifted and the compression of the air is messed up and you loose the power.

Same applies to the air intake. It is in the front of the engine for some reasons. It is high from the ground (to avoid hydro-locking). It sucks cool air from the outside. It directed so the air is pushed inside when car is moving forward. Do you really want to loose all of this because you clearly subjective feeling that the engine is choking?

[MainlandMig]

i dont think i would ever buy a K&N filter for our cars... i would need further convincing. .. but am not closed minded to certain mods

YES the a6 is highly engineered but that doenst mean the engineers built perfection... if they did then how does one explain software updates ..ie the one when changing tranny fluid

yes there is pressure to advance performance ... maybe not top BMW.. and def not to exceed S or RS models .. ALSO practicality and economics comes into play... they outsource these parts... they contact ZF and say we need a tranny with these specs ...they contact Bosch and say we need a sensor / wiper / a plug / w these specs

also people need to get over the whole 17in wheels thing

maybe 17s are best for an 80s BMW track car but theres no way the bentley sedan could reach its top speeds w 17s... modern cars demand greater radii or radiuses.

not trying to argue or increase any negative back and forth dialog... really just adding another perspective

my .02

[z06psi]

Well the K&N is the same size for the 5.2 as the stockers but K&N's don't need to be replaced. Just cleaned with every oil change. We will call it a draw.

So the 5.2 has variable intake runner length? hmmmmm

Vacuum is vacuum and not good for power. Boost on the other hand is good. If the engine is pulling a vacuum enough to open flaps in the air box then it is being choked off to some degree.

What about on the Magnaflow or VAGCOM questions?

Anybody mess with those on here?

[sgroer]

When I had a 2007 S6, I just had the resonators deleted - It sounded simply awesome.
Here's a VERY quick vid of it.
http://www.youtube.com/watch?v=0pD0sWzP8lU

[z06psi]

Did you X-pipe it or did you just replace the resonators with straight pipe? If you x-piped it which part did you use?