Drivetrain K&N intake for cooper S
K&N intake for cooper S
I have been trying to decide if I want to get an aftermarket intake for my 2008 cooper S and came across this http://www.knfilters.com/search/prod...rod=69-2004TTK It says it was just released on June 29th, anyone get one yet?
Very interesting... looks much better than the Apollo version that has been on thier website for a while...
$279 through K&N online is pretty rediculous though considering Alta's systems is $199 now...
$279 through K&N online is pretty rediculous though considering Alta's systems is $199 now...
Agreed interesting. A few things to note. It has a new turbo inlet tube but it looks small in diameter. So the price is a little bit more because you are getting a new turbo inlet tube with it as well. I have the alta intake and going to order there turbo inlet tube soon as well.
If anyone actually orders this let us know what you think. I have always felt K&N adds a few hp to what the claim the intake will actually get. And this isn't on MINI's I'm talking about other cars and trucks.
If anyone actually orders this let us know what you think. I have always felt K&N adds a few hp to what the claim the intake will actually get. And this isn't on MINI's I'm talking about other cars and trucks.
Is it really a bad design? 
I keep hearing of complaints about the open filters and hot air, but since this one (and the DDM) leaves the bottom half of the stock intake intact, isn't cold air still being funneled from the front of the car back to the filter? Also, when the hood is closed, isn't the K&N design still being boxed off from the heat of the engine? Is it just me, but doesn't it closely mimic the design of the JCW intake system with the cone filter inside the air box?

I keep hearing of complaints about the open filters and hot air, but since this one (and the DDM) leaves the bottom half of the stock intake intact, isn't cold air still being funneled from the front of the car back to the filter? Also, when the hood is closed, isn't the K&N design still being boxed off from the heat of the engine? Is it just me, but doesn't it closely mimic the design of the JCW intake system with the cone filter inside the air box?
If you look at the engine compartment photo it looks like the sides of the box extend up to meet the hood, or close to it. That said the heat issue is what has stopped me from buying an aftermarket intake
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I think there have been tests that have shown no power loss or gain over using a cold air intake.
The air is being compressed either way, so the temp difference on a FI car isn't as detrimental to performance as it is on a naturally aspirated engine.
The air is being compressed either way, so the temp difference on a FI car isn't as detrimental to performance as it is on a naturally aspirated engine.
You have to be extremly careful not to over oil the K&N filter. Most people way over oil these type of filters.
I have been useing oiled filters on my Porsche and never had a problem with the MAF like other have had.
I have been useing oiled filters on my Porsche and never had a problem with the MAF like other have had.

Whether CAI makes a difference or not is totally dependant on the car it's fitted on. It's got to do with ECU aggressiveness and to some extent location. For example it made no difference (other than sound) in my Elise, but the difference was definitely noticeable in a Mustang GT. ECU in the Lotus "learned out" any initial benefits of the CAI. Mustang's ECU on the other hand was more or less oblivious, it just wanted more/better fuel.
As far as cold/hot air in FI vs NA engines - Forced Induction engines LOVE cold air for the exact reason you've mentioned - air gets compressed. Hot air requires a lot more compression/work (molecules are wider apart) - thus more RPMs from the turbo, something that you don't get for free.
There's a reason why turbo cars are noticeably faster in the winter
Last edited by sl8anic; Jul 22, 2009 at 04:03 PM.
I'm not so sure about either of your points kind sir... 
Whether CAI makes a difference or not is totally dependant on the car it's fitted on. It's got to do with ECU aggressiveness and to some extent location. For example it made no difference (other than sound) in my Elise, but the difference was definitely noticeable in a Mustang GT. ECU in the Lotus "learned out" any initial benefits of the CAI. Mustang's ECU on the other hand was more or less oblivious, it just wanted more/better fuel.
As far as cold/hot air in FI vs NA engines - Forced Induction engines LOVE cold air for the exact reason you've mentioned - air gets compressed. Hot air requires a lot more compression/work (molecules are wider apart) - thus more RPMs from the turbo, something that you don't get for free.
There's a reason why turbo cars are noticeably faster in the winter

Whether CAI makes a difference or not is totally dependant on the car it's fitted on. It's got to do with ECU aggressiveness and to some extent location. For example it made no difference (other than sound) in my Elise, but the difference was definitely noticeable in a Mustang GT. ECU in the Lotus "learned out" any initial benefits of the CAI. Mustang's ECU on the other hand was more or less oblivious, it just wanted more/better fuel.
As far as cold/hot air in FI vs NA engines - Forced Induction engines LOVE cold air for the exact reason you've mentioned - air gets compressed. Hot air requires a lot more compression/work (molecules are wider apart) - thus more RPMs from the turbo, something that you don't get for free.
There's a reason why turbo cars are noticeably faster in the winter

And Another Point
If the air temp didn't matter, we wouldn't need intercoolers.
I had a supercharged and intercooled Mustang GT. Cool air definitely makes a difference. I ran much faster 1/4 miles (nearly a full 0.5 second) in the early spring and fall vs summer in Washington State (the dry side).
I had a supercharged and intercooled Mustang GT. Cool air definitely makes a difference. I ran much faster 1/4 miles (nearly a full 0.5 second) in the early spring and fall vs summer in Washington State (the dry side).
Last edited by dleach; Jul 26, 2009 at 01:26 PM. Reason: Added more.
I'm not so sure about either of your points kind sir... 
Whether CAI makes a difference or not is totally dependant on the car it's fitted on. It's got to do with ECU aggressiveness and to some extent location. For example it made no difference (other than sound) in my Elise, but the difference was definitely noticeable in a Mustang GT. ECU in the Lotus "learned out" any initial benefits of the CAI. Mustang's ECU on the other hand was more or less oblivious, it just wanted more/better fuel.
As far as cold/hot air in FI vs NA engines - Forced Induction engines LOVE cold air for the exact reason you've mentioned - air gets compressed. Hot air requires a lot more compression/work (molecules are wider apart) - thus more RPMs from the turbo, something that you don't get for free.
There's a reason why turbo cars are noticeably faster in the winter

Whether CAI makes a difference or not is totally dependant on the car it's fitted on. It's got to do with ECU aggressiveness and to some extent location. For example it made no difference (other than sound) in my Elise, but the difference was definitely noticeable in a Mustang GT. ECU in the Lotus "learned out" any initial benefits of the CAI. Mustang's ECU on the other hand was more or less oblivious, it just wanted more/better fuel.
As far as cold/hot air in FI vs NA engines - Forced Induction engines LOVE cold air for the exact reason you've mentioned - air gets compressed. Hot air requires a lot more compression/work (molecules are wider apart) - thus more RPMs from the turbo, something that you don't get for free.
There's a reason why turbo cars are noticeably faster in the winter

To add to this great post, DSM guys that simply mount their intake filters in their fender well where air has a straight shot and is cooler, are picking up 2mph in the 1/4 mile. That is a huge gain for simply changing filter placement.
an entire page about MAF sensors-they know it's a point of concern but i think i trust them. any my wife's company sells them wholesale :-)
http://www.knfilters.com/MAF/massair.htm
http://www.knfilters.com/news/news.aspx?ID=2098
http://www.knfilters.com/MAF/massair.htm
http://www.knfilters.com/news/news.aspx?ID=2098
Save your money and get the DDM intake with the K&N filter for $190, I don't believe the 11hp gain K&N claims, even with a dyno sheet.
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I can get the K&N for less than that though through work...so i'll be trying it as my first intake on the car...But yeah I would never buy the K&N for the crazy 280 it seems to cost most places...I can get it for 100 cheaper though so I figure it's worth a shot.



