Charcoal Filter Removal
02-09-2006, 06:03 PM
#41
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I took mine out and drove around for a few days and noticed nothing, except that when in sport mode, shifting was more erratic. I put it back in this morning and think I will just leave it in. I just got this 550, only has 600 miles on it.
02-10-2006, 09:33 AM
#42
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My Ride: 545i; Manual Shifter
Originally Posted by carfreak' post='237367' date='Feb 9 2006, 09:53 AM
Just checked my car and it doesn't have it. 
530i July 04' build.
530i July 04' build.
02-11-2006, 08:26 PM
#43
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Originally Posted by 530i SMG' post='235946' date='Feb 6 2006, 09:09 PM
on a slightly OT note, any ideas as to what kind of difference i might notice with a K&N filter
02-12-2006, 06:12 PM
#44
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My Ride: Now Driving a Freakin' Prius!
Was...
2004 545i | SMG | White/Black | Sport | NAV | Logic 7 | PDC | Fold-down Seats | Adaptive Headlights | Cold Weather Pkg | Clear-again Bra | Mud Flaps | Bluetooth | Coat Hangar | Aux Input | All Weather Mats | 18"X8.5" BBS RK w/ Michelin Pilot Alpin's (winter) | New steering rack @ 1.2K & 17K miles| Software V.19.1 | B&B Exhaust (vrrrroooooommm!) <---Click.
I took mine out Friday night.
I also cleaned & re-oiled the K&N.
Saturday the car did feel more responsive and sounded a little louder upon hard accelleration.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
I also cleaned & re-oiled the K&N.
Saturday the car did feel more responsive and sounded a little louder upon hard accelleration.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
02-17-2006, 10:09 AM
#45
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Originally Posted by realtyman' post='239217' date='Feb 12 2006, 10:12 PM
I took mine out Friday night.
I also cleaned & re-oiled the K&N.
Saturday the car did feel more responsive and sounded a little louder upon hard accelleration.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
I also cleaned & re-oiled the K&N.
Saturday the car did feel more responsive and sounded a little louder upon hard accelleration.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
02-17-2006, 01:26 PM
#46
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My Ride: '05 545i, silver gray, black leather with anthracite maple wood, sport package, premium sound, navigation, cold weather package, electric rear sunshade, folding rear seat, satellite radio prep, PIAA 4150K fogs, red rear reflectors, hardwired Valentine One
Originally Posted by realtyman' post='239217' date='Feb 12 2006, 07:12 PM
Saturday the car did feel more responsive and sounded a little louder upon hard accelleration.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
Could be the charcol filter - or the "pile" of dried leaves that was in the air box! WTF is with that. I've had many cars with this type of air-box setup and Never have I had so many leaves.
Next Fall I'm just going to drive my car around the yard instead of hiring some stiff to rake up my lawn.
02-22-2006, 07:40 AM
#47
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My Ride: 2006 550i, Black/Black, every option except HUD
I took out mine this morning. Interestingly enough, there were no clips!! The thing was molded into the top of the air box. I had to pry the corners off. If I ever decide for whatever reason to put it back, I'll need epoxy!
And unfortunately, I didn't have any leaves or styrofoam high-performance accessories like many of you...
And unfortunately, I didn't have any leaves or styrofoam high-performance accessories like many of you...
02-28-2006, 04:47 PM
#48
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Originally Posted by EuroCarFan' post='235391' date='Feb 5 2006, 10:22 PM
As for their high powered fan, I've seen it in their dyno room. As I recall, it's about 4-6 ft in front of the car, I think and it's used to simulate air flow at speeds which is common in any dyno facility. I'm not sure if I understand what you mean about it being used to push air into the intake box. Do you mean that air is funneled directly to the intake box because it looked like it was just aimed at the general frontal area of the car.
I hope your CAI does provide the HP you want. It seems like it should get more air in and through the Dinan throttle body. The question then becomes can the engine effectively use more air? Dinan says yes, and I tend to trust them a reasonable amount.
But, for example, the 02-04 Z06 benefits from more air only temporarily without dyno tuning later. Over time the increased air flow causes the engine to run rich and, thus, puts you back to where you started or maybe slightly worse off. Today's engines can do unexpected things given that today's cars are capable of learning/adapting. Sometimes the addition of aftermarket parts is not allowed for and the learnings/adaptations turn out to be not so good.
02-28-2006, 04:50 PM
#49
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Originally Posted by Schpilky' post='244237' date='Feb 22 2006, 11:40 AM
I took out mine this morning. Interestingly enough, there were no clips!! The thing was molded into the top of the air box. I had to pry the corners off. If I ever decide for whatever reason to put it back, I'll need epoxy!
And unfortunately, I didn't have any leaves or styrofoam high-performance accessories like many of you...
And unfortunately, I didn't have any leaves or styrofoam high-performance accessories like many of you...
03-01-2006, 04:29 PM
#50
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Originally Posted by EuroCarFan' post='235230' date='Feb 5 2006, 03:05 PM
I took apart the Dinan CAI...well, just the airfilter box and guess what? No charcoal filter! The Dinan CAI assembly consists, among other things, of a new air filter box cover, which has the Dinan name and logo engraved. So the new lid does not have that filter. From what most of you have said, this could perhaps contributed to the 17hp gain that Dinan claims.
Oh and btw, no styrofoam... Dinan must have removed it along with any other deposits when they installed the new CAI.
Oh and btw, no styrofoam...
Dinan must have removed it along with any other deposits when they installed the new CAI.Blue M5 with Eisman exhaust no other mods: charcoal filters in
P400 mode = 348.23HP
P500 mode = 415.31HP
humidity 11% temperature 69F
Silver grey M5 with charcoal filters in with no other mods:
P400 mode = 333.46HP
P500 mode = 413.70HP
humidity 10% temperature 69
Black M5 had no mods and removed charcoal filters
P400 mode = 327.41
P500 mode= 423.88
humidity 10% temperature 69
So, these tests imply unreasonably that the filter removal may help, may not help, or may hurt.
At the extreme, one might conclude that the filter removal added about 16 RWHP--which would mean about 19 crank HP. 
I'm not yet ready to attribute any increase in HP to the filter removal. I'm keeping mine until I see much better evidence. The dyno tests reveal some of the follies of trying to draw conclusions from one-time dyno testing in particular.