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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 11-13-2010, 05:29 PM   #1
Rhudeboye
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K&N Intake vs filter

For you guys that went to the Cold air intakes. Are you happy with the HP gains and the new sound it produces? Also- If so what engine size do you have?

For the flat K&N filter users. How do you feel about the product.

Both claim to save money filters and gas. intakes boast a lot more power at about 4X teh cost. Either way its cheap HP.
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Old 11-13-2010, 05:58 PM   #2
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umm my k&n is prrety nice but in the end intakes for our 3.0's just dont produce any xtra speed
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Old 11-13-2010, 06:02 PM   #3
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Intake for sound/Drop-in for small gains.
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Old 11-13-2010, 06:11 PM   #4
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Drop in = no gains.
Cone filter = Small gains
Full intake = gains.
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Old 11-14-2010, 12:55 AM   #5
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Which ever filter you get just keep it clean. Clean air filter = HP
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Old 11-14-2010, 01:23 AM   #6
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Why would BMW a well respected inovative car manufacturer make crap restrictive stock air box that would choke engine and ruin gas mileage and kill horsepower?
Does not make sense.

Fact is, stock air box is COLD AIR INTAKE, it takes air from the front, and on E46 it is actualy ram air cold air intake, does not get better than that.
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Old 11-14-2010, 02:31 AM   #7
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Why would BMW a well respected inovative car manufacturer make crap restrictive stock air box that would choke engine and ruin gas mileage and kill horsepower?
Does not make sense.

Fact is, stock air box is COLD AIR INTAKE, it takes air from the front, and on E46 it is actualy ram air cold air intake, does not get better than that.
Yes it does, the stock box wasn't made with maximum horsepower in mind. Have you ever seen the exhaust manifolds on these cars?
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Old 11-14-2010, 01:19 PM   #8
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Yes it does, the stock box wasn't made with maximum horsepower in mind. Have you ever seen the exhaust manifolds on these cars?
Stock air box system is made with maximum efficiency, its been long proven that a $350 aftermarket cold air intake in these cars result in very minimal or no power gain at all. Stock air filter does look small, but there are quality dry filters that don't restrict much as a FRAM paper filter.

Exhaust manifolds do look restrictive and I am not talking about that, I am talking about air intake. Fact is manufacturer is obligated to put catalist converters on the car and they are restrictive, every time you put some obsticle in the exhaust system it will create restriction and rob power. Manifolds had to be made that way for the pre-cats to be able to do their job properly, I am shure BMW would love to just put one some straight pipe there, it would save them money or you actually think they were so stupid and Active Autowerke is so smart to fix their horrible design with ebay headers. Give me a brake dude
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Old 11-14-2010, 06:43 PM   #9
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Shut up.

http://forum.e46fanatics.com/showpos...95&postcount=1
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Old 11-14-2010, 06:46 PM   #10
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lol
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Old 11-17-2010, 11:43 AM   #11
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There is always a compromise when tuning the intake systems in cars, manufacturers always do tune to their goal of the engine parameters in mind. There is sometimes something more to be had with an aftermarket intake system. One of the things they tune out from the manufacturer is the sucking intake sound. How they do so robs power that is already there.

Also, remember the engine is a huge vacuum pump.

Test this at home, turn on your vacuum and feel the suction, then make the opening smaller, if it is a 2" opening make it 1". I bet suction has gone down and the motor gets louder.

Engine is the vacuum, point of entry is the little opening under the filter. Get rid of turbulence and make a larger opening the engine becomes a bit more efficient at ingesting air.
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Old 11-17-2010, 12:01 PM   #12
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From switching from a panel to a cone with velocity stack, I made an additional 5wtq and 3whp in the low RPMs. I made a little bit up top, but not peak.

Will be hitting the dyno with a Dinan tube-style in early 2011.
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Old 11-17-2010, 12:22 PM   #13
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I compared my 330i, stock intake and filter then K&N cone on a dyno. No differance but sound. Maybe like 1hp and 1tq, but nothing to phone home about.

The stock box is restrictive, why else would the BMW Performance intake offer more avenues for air intake?
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Old 11-17-2010, 01:49 PM   #14
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so i have a K&N intake with no velocity stack, should i put one on??? im goign to purchase a dry flow filter and was just wondering if anyone would advise me to purchase a velocity stack
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Old 11-17-2010, 04:19 PM   #15
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I noticed a difference in feel with an intake. I just recently installed an ECIS and took it to the Ring for a few laps. I feel I have picked up power where I was originally lacking. Not much, but noticeable to me.
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Old 11-18-2010, 01:53 PM   #16
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so i have a K&N intake with no velocity stack,
When you first installed it, did you feel a diff or just hear one?
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Old 11-23-2010, 03:27 PM   #17
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After cleaning all the crud off of my ICV and TB, I switched my K&N back to the oem paper/foam filter. The K&N caused my ICV to get stuck with crud.
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Old 11-23-2010, 03:37 PM   #18
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I noticed a difference in feel with an intake. I just recently installed an ECIS and took it to the Ring for a few laps. I feel I have picked up power where I was originally lacking. Not much, but noticeable to me.
i noticed a bit of a different but it might have been just wishful thinking im reading up on that velocity stack thing and i wanna see if that changes anything i definitely need to go in and clean my ICV an TB once i purchase my dry flow filter

what is really annoying is the stupid whistle the K&N intake has
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Old 11-23-2010, 05:26 PM   #19
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I actually like the whistle I could see how to many it would be annoying though. BTW, nice car e46 driver!
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Old 12-05-2010, 09:00 PM   #20
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i started out with a drop in and later decided to go with the K&N 57-1001 Fuel Injection Performance Kit Gen2. The Drop in kit sounds better although there isn't any noticeable power increase. The K&N 57-1001 Fuel Injection Performance Kit Gen2 adds more torque and sounds deeper.
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