G35 Coupe V35 2003 - 07 Discussion about the 1st Generation V35 G35 Coupe

Z-Tube K&N sluggish below 1.5K

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Old Dec 22, 2005 | 06:37 PM
  #16  
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Originally Posted by OldVFRGuy
That is really strange.......


I installed a K&N Cone type filter on my car.....and it seems to have a LOT more power than before......
What a tease
 
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Old Dec 22, 2005 | 10:56 PM
  #17  
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Okay . . . For what it is worth to all of you fellow forum members on this thread. As you know, I had re-installed a K&N drop-in filter in my G a few days ago. I noticed that when I conservatively engaged 1st gear and literally stomped on the gas pedal it took a sec or two for my G to get going. It was as if I had to wait for the power to get to the rear wheels. This was very noticeable when driving on hills. I have a steep and long hill with a bunch of great twisties, which I travel everyday to get to and from home. On the said hill, I would allow the car to slow down to about 5 to 10 mph in 1st gear and hit the gas pedal. With the K&N drop-in there is a real lag from the time I hit the gas pedal and the time in which I feel the pick up.

After having read the first post in this thread, last night . . . I swapped out the K&N for the OEM filter before I made my first post here.

Well, I drove the car around all day today. Upon arriving at the same said hill, I drove my car under the same scenario under which I felt the engine lag, if you will. With the OEM filter, when I stomp on the gas pedal, the car responds as it should and as it did prior to me re-installing the K&N filter . . . Hit the gas pedal at 5 to 10 mph and the car moves without delay.

Needless to say, the K&N filter will stay in its box until my exhaust arrives. Then I'll try it again.

I believe that K&N produces an excellent product. If it works for you . . . By all means, use it.
 
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Old Dec 22, 2005 | 11:02 PM
  #18  
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Yah You Teasing Bastard, Hahahah J/k
 
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Old Dec 23, 2005 | 01:22 AM
  #19  
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Question

This is all kind of hard for me to understand...

Car needs air, air filter needs to clean and supply said air, OEM filter does the job and cleans and supplies air.

K&N is *supposed* to clean air BUT give more air flow for better performance.

How in the world could dropping a K&N filter make things worse is just so confusing? Do you think it's b/c they engineered the car to perform at it's **MAX**, and they got the engine to perform at it best using an OEM air filter, and somehow, changing that filter, causing things to get "miss-aligned"??????? Like not all the parts fit to where they designed it???

I would just think that more air would = more power. Just like the Plenium Spacers, MREV Plus etc etc....

This is so weird guys!

Somebody step up and explain this, please.
 
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Old Dec 23, 2005 | 02:00 AM
  #20  
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Perhaps, AthenG's and my own experiences are unique to themselves.

Hmmm . . . Come to think of it, I have read quite a few posts . . . Where certain CAI kits have caused a lost in low end torque. That seems strange, as well. Go figure!
 

Last edited by Andy2434; Dec 23, 2005 at 02:05 AM.
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Old Dec 23, 2005 | 02:07 AM
  #21  
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Originally Posted by 99atlantic
i doubt a k&n would cost you power with a plenum; hell, i've seen bone stock coupes dyno +5rwhp from just adding the k&n by itself
That's peak power, right? The issue here is down low . . . Way down low.
 
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Old Dec 23, 2005 | 02:38 AM
  #22  
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Originally Posted by WhiteonWheat
This is all kind of hard for me to understand...

Car needs air, air filter needs to clean and supply said air, OEM filter does the job and cleans and supplies air.

K&N is *supposed* to clean air BUT give more air flow for better performance.

How in the world could dropping a K&N filter make things worse is just so confusing? Do you think it's b/c they engineered the car to perform at it's **MAX**, and they got the engine to perform at it best using an OEM air filter, and somehow, changing that filter, causing things to get "miss-aligned"??????? Like not all the parts fit to where they designed it???

I would just think that more air would = more power. Just like the Plenium Spacers, MREV Plus etc etc....

This is so weird guys!

Somebody step up and explain this, please.
I'm not that familiar with our car's intake layout (I've had the car less than 2 weeks), but I've run in to situations with previous cars and aftermarket intake setups where the MAF sensor was getting odd readings related to turbulence and weird airflow patterns being generated at the sensor as a result of changes upstream. In the case of swapping out the stock filter for a K&N, perhaps the shape and characteristics of the K&N material result in some odd airflow around the MAF? I find this a stretch in this case, but at least it throws a possible explanation out there.
 
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Old Dec 23, 2005 | 08:15 AM
  #23  
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New to this car as well.. but how picky are the ECU's on this car? Mechee is right about air flow across the maf, with the obivious increase in airflow from CAI system and the way it flows across the meter it might be confusing the ECU and putting it in some sorta limp mode down in the lower RPM band (pulling all the timing for engine safety)

Do they have any aftermarket flashers or chips?? After racing mustangs for years just trying to convert some general knowledge? Im sure some of the FI guys can chime up bout the ECU systems.
 
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