545i Muffler Exhaust
Thread Starter
Contributors
Joined: May 2004
Posts: 2,863
Likes: 1
From: SoCal San Diego
My Ride: 545i Sport
Model Year: 2004
Engine: N62
Noticed that there is some kind of actuator valve behind the right exhaust pipe.
There is a hose connected to introduce the vacuum to pull lever to open the valve.
There is a strong spring tension to keep it closed. To open this valve I put safety wires while pushing lever to the portside of the car.
This is also discussed here.
There is a hose connected to introduce the vacuum to pull lever to open the valve.
There is a strong spring tension to keep it closed. To open this valve I put safety wires while pushing lever to the portside of the car.
This is also discussed here.
Thread Starter
Contributors
Joined: May 2004
Posts: 2,863
Likes: 1
From: SoCal San Diego
My Ride: 545i Sport
Model Year: 2004
Engine: N62
I left the hose connected and added a bigger wire (cut metal hanger) for stronger cable.
<span style='font-size:14pt;line-height:100%'>"Please use work gloves and eye protection"</span>
GEARS5 Posted: Sep 13 2004, 01:29 PM
realtyman Posted: Sep 13 2004, 09:00 PM
JDN Posted: Sep 13 2004, 09:19 PM
<span style='font-size:14pt;line-height:100%'>"Please use work gloves and eye protection"</span>
GEARS5 Posted: Sep 13 2004, 01:29 PM
I just wired that lever back (see Rizbel's pic above) and took a ride around the block. I noticed a difference right from startup! Much throatier with a rumble. Also big difference on the downshifts (SMG)....Cool! Thanks.
JDN, how does it sound around 1200 - 1500 rpm under load? In the upper revs it is most likely open (or at least "more" open).
After a few days of evaluation, I'd have to say that unless you are looking to hear the car alot then really consider what you are doing if you are looking to do an aftermarket exhaust (not specific to JDN? ). If you'd like a "little" more sound then maybe the valve trick will do it. Just be sure that you are looking for Sound before doing an exhaust mod. Once again, I am NOT complaining but it IS louder than I expected.? ?
BTW, 4 days and the wife still hasn't figured it out (the car rolls really well in Neutral? ).
After a few days of evaluation, I'd have to say that unless you are looking to hear the car alot then really consider what you are doing if you are looking to do an aftermarket exhaust (not specific to JDN? ). If you'd like a "little" more sound then maybe the valve trick will do it. Just be sure that you are looking for Sound before doing an exhaust mod. Once again, I am NOT complaining but it IS louder than I expected.? ?
BTW, 4 days and the wife still hasn't figured it out (the car rolls really well in Neutral? ).
It's more of a resonance at that speed if I can hear it at all. Cannot hear the individual cylinders firing as with a real mod. If I did not know I had the valve locked open, I wouldn't know I had the valve locked open. The wife never figured it out until I told her why I gunned through the first two gears from a traffic light. She didn't complain -- took it like a real trooper, I just thought I owed her an explanation.
... and Club Femme Nu 
! you used to live here?
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Joined: Jun 2004
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From: USA
Originally Posted by 545RV' date='Sep 13 2004, 08:00 PM
Alohalc anyone who has been to Oahu knows where some of the best eye candy is 
. so many nice looking japanese chicks walking around 
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Thread Starter
Contributors
Joined: May 2004
Posts: 2,863
Likes: 1
From: SoCal San Diego
My Ride: 545i Sport
Model Year: 2004
Engine: N62
Here's the ultimate solution without buying new exhaust... and more.
545 / Exhaust Valve Opened & 1 set of resonators removed by ch7656
545 / Exhaust Valve Opened & 1 set of resonators removed by ch7656
