Missing Air intake flap

[mattCSLnut]

I wasn't even aware it was missing Matt, sorry. I've not really examined the engine bay in that much detail in 3000 miles of ownership.

I have no idea who removed it and given that the engine noise increased as expected when the sport button is pressed I had no reason to suspect otherwise.

Lawsy, I have nothing to hide but maybe the previous owners did. Assuming I should know everything ever done to a car with 5+ owners is a bit stupid to be frank - quite a naive comment to make.

Jeff

No worries Jeff. As I said earlier, I totally TRUST U as you were/are VERY honest & open about you CSL and I'm REALLY, VERY happy with it :thumbs:, as it is. THANX again :thumbs:
And I do agree with U, it was a bit of a "LAWSY" comment but then I did turn his CSL down in favor of yours, so may be there is a bit of :gayfight: going on :whistle:

[mattCSLnut]

And if you had a flap, which would be functioning correctly it opens with sport on to give the lovely induction noise, sport off= no induction noise.

The throttle inputs change and it becomes more sensitive.

I have LOVELY induction noise ALL of the time +1 :whistle:

[shane@mbtech]

No worries Jeff. As I said earlier, I totally TRUST U as you were/are VERY honest & open about you CSL and I'm REALLY, VERY happy with it :thumbs:, as it is. THANX again :thumbs:
And I do agree with U, it was a bit of a "LAWSY" comment but then I did turn his CSL down in favor of yours, so may be there is a bit of :gayfight: going on :whistle:

Sorry, its you southerners with no sense of humour, :gayfight:

My car is most definitely not for sale, but if it was it would come complete with fully functioning air flap.:birdman::birdman:

[glendog74]

As per title, I notice a week ago that the large, plastic flap is missing from my intake :smt017 (as per pic below) where it is expected to be attached to the central rod. The car seem to run VERY WELL as it is but I just wanted to ask a couple of questions about it.

a) Is this some sort of a CSL modification for more power ?

b) Should I worry about any future problems as a result of NOT having this part ?

c) What does it actually do ?

Just wondering, that's all :whistle:

I trust Jeff didn't remove that part (I don't think) as he would have mentioned it to me. Everything else is SUPERB with my chosen CSL. It's absolutely FAN-Bloody-Tastick :thumbs: THANX for caring :whistle:

That I have :hahaha: Lots of LORVELY INDUCTION noise :drool:

When I press my SPORTS button, difference can VERY much be felt, whilst on the move. It's as if someone has dabbed the loud pedal without me touching it. :thumbs:

No worries Jeff. As I said earlier, I totally TRUST U as you were/are VERY honest & open about you CSL and I'm REALLY, VERY happy with it :thumbs:, as it is. THANX again :thumbs:
And I do agree with U, it was a bit of a "LAWSY" comment but then I did turn his CSL down in favor of yours, so may be there is a bit of :gayfight: going on :whistle:

I have LOVELY induction noise ALL of the time +1 :whistle:

NO NEED TO SHOUT IN EVERY POST MATT...! :whistle:

[mattCSLnut]

It also opens with sport 'off' - just at a higher rev bracket.

I removed my flap over a year ago and although i now don't get the night and day sound difference between sport on and off, i do still get a noticeable audible difference when sport is selected on. It may be due to my SS Race silencer, but the noises definitely hardens and gets raspier when sport is on :drool:

Ahhh... THANX GlenDog :thumbs: that's beginning to make some sense. Am I OK to run it as it is or should I get myself a flap and stick it back in for originality ? (as BMW AG intended)

[mattCSLnut]

Sorry, its you southerners with no sense of humour, :gayfight:

My car is most definitely not for sale, but if it was it would come complete with fully functioning air flap.:birdman::birdman:

Ahhh... but it was when I was looking for a SG CSL few weeks ago, wasn't it. Isn't yours the one with NO speck at all, except the retrofit Angel eyes and Xenons ? +2 :whistle:

[mattCSLnut]

:blalalala:

no need to shout in every post matt...! :whistle:

WHAT ??? :blalalala:

[shimmy]

look i am sure others will correct me but;

1. i have had 3 intake potentiometers for the flap activation. all three have broekn in about 1 year. I am convinced they give up because they cannot stand the constant strain of opening the flap which is a tightish fit to the intake

2. All it means is that the intake is constantly open and as the intake flap is only there for emissions/noise control (Eliott say noise but i thought it was emissions) who gives a flying ......

3 The Sport button is somehting totally independant and only affects the flap by allowing it to open at around 3500 revs rather than higher (4500-5000 ish???)

4. Sport button adjusts your ECU to give about 25bhp more instantly along with the throttle to give a better response to the throttle pedal. Sport button also changes you exhaust note by modulating the sport exhaust flaps by the exhaust manifold. Finally it hardens your steering rack sensitivity to make it more racey


Enjoy :supz:

[shane@mbtech]

Ahhh... but it was when I was looking for a SG CSL few weeks ago, wasn't it. Isn't yours the one with NO speck at all, except the retrofit Angel eyes and Xenons ? +2 :whistle:

Just as bmw intended. Least mines got an airflap. and my dads better than yours:blalalala:

[shane@mbtech]

look i am sure others will correct me but;

1. i have had 3 intake potentiometers for the flap activation. all three have broekn in about 1 year. I am convinced they give up because they cannot stand the constant strain of opening the flap which is a tightish fit to the intake

2. All it means is that the intake is constantly open and as the intake flap is only there for emissions/noise control (Eliott say noise but i thought it was emissions) who gives a flying ......

3 The Sport button is somehting totally independant and only affects the flap by allowing it to open at around 3500 revs rather than higher (4500-5000 ish???)

4. Sport button adjusts your ECU to give about 25bhp more instantly along with the throttle to give a better response to the throttle pedal. Sport button also changes you exhaust note by modulating the sport exhaust flaps by the exhaust manifold. Finally it hardens your steering rack sensitivity to make it more racey


Enjoy :supz:

Now I know all this Im gonna knock one out all over my flap. :smokin:

[glendog74]

Ahhh... THANX GlenDog :thumbs: that's beginning to make some sense. Am I OK to run it as it is or should I get myself a flap and stick it back in for originality ? (as BMW AG intended)

I would leave it as it is - flap motor knackered or otherwise. The flap was only ever there to satisfy noise regs as has been mentioned.

The only minor side affect would be that the air filter may get soiled slightly quicker than it would otherwise with flap in place (at lower revs anyway...) Not worth concerning oneself about! :whistle:

[mattCSLnut]

It also opens with sport 'off' - just at a higher rev bracket.

I removed my flap over a year ago and although i now don't get the night and day sound difference between sport on and off, i do still get a noticeable audible difference when sport is selected on. It may be due to my SS Race silencer, but the noises definitely hardens and gets raspier when sport is on :drool:

All that U describe does happen (without the flap) :smt017

[shane@mbtech]

Ahhh... but it was when I was looking for a SG CSL few weeks ago, wasn't it. Isn't yours the one with NO speck at all, except the retrofit Angel eyes and Xenons ? +2 :whistle:

Everythings for sale at the right price, tbh im glad you bought someone elses, as it would have been a big mistake selling it. Its too good to sell and will be even better white:beer:

[shane@mbtech]

All that U describe does happen (without the flap) :smt017

If its true what shimster says the exhaust note changes that will explain the difference you feel.

[mattCSLnut]

look i am sure others will correct me but;

1. i have had 3 intake potentiometers for the flap activation. all three have broekn in about 1 year. I am convinced they give up because they cannot stand the constant strain of opening the flap which is a tightish fit to the intake

2. All it means is that the intake is constantly open and as the intake flap is only there for emissions/noise control (Eliott say noise but i thought it was emissions) who gives a flying ......

3 The Sport button is somehting totally independant and only affects the flap by allowing it to open at around 3500 revs rather than higher (4500-5000 ish???)

4. Sport button adjusts your ECU to give about 25bhp more instantly along with the throttle to give a better response to the throttle pedal. Sport button also changes you exhaust note by modulating the sport exhaust flaps by the exhaust manifold. Finally it hardens your steering rack sensitivity to make it more racey


Enjoy :supz:

Thanx SimmMeister :thumbs: that sounds reasonably sensible :hahaha: Shall I leave it as it is or re-fit the flap where it belongs ?