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      01-25-2018, 06:17 PM   #1
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Any reason to not just leave your exhaust valves open all the time?

why wouldn't you want to hear that exhaust note all the time?
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      01-25-2018, 06:27 PM   #2
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Mine are always open. Valves are unplugged.
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      01-25-2018, 06:28 PM   #3
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      01-25-2018, 06:41 PM   #4
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Open is so nice.

Pretty sure the neighbors are going to get tired of the cold start though.
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      01-25-2018, 06:45 PM   #5
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Well if it makes the car sound like it does when it starts, then I know one reason. Not pretty!
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      01-25-2018, 06:49 PM   #6
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Quote:
Originally Posted by doug_999 View Post
Well if it makes the car sound like it does when it starts, then I know one reason. Not pretty!
This,

The cold start isn't very good. Would wake up my whole neighborhood if I did that every 6am
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      01-25-2018, 07:03 PM   #7
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Too much drone at highway cruising speed.
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      01-25-2018, 07:08 PM   #8
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Yup, highway I'm in efficient. Carrying passengers, efficient. Noise isn't always a good thing.
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      01-25-2018, 07:32 PM   #9
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too much noise and power for bumper to bumper traffic
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      01-25-2018, 07:37 PM   #10
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No different power in the other modes.
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      01-25-2018, 07:46 PM   #11
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Valve control here
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      01-25-2018, 07:47 PM   #12
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Quote:
Originally Posted by SakhirM4 View Post
Mine are always open. Valves are unplugged.
I am interested How?
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      01-25-2018, 07:58 PM   #13
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Always open, as its always in sport plus, to avoid rev match.
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      01-25-2018, 08:11 PM   #14
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Quote:
Originally Posted by specracer View Post
Always open, as its always in sport plus, to avoid rev match.
Being always in Sport+ doesn't mean valves are always open, just FYI. Especially if you have a recent software, Sport+ closes valves even in lower gears depending on the RPM. If you are on an older software, Sport+ closes valves only in higher gears depending on the RPM.
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      01-25-2018, 08:31 PM   #15
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I leave mine plugged in for options. I like being able to tweak lil bits of the car (drive modes, exhausts, suspension, steering, etc.)
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      01-25-2018, 08:54 PM   #16
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Quote:
Originally Posted by cntzl View Post
Being always in Sport+ doesn't mean valves are always open, just FYI. Especially if you have a recent software, Sport+ closes valves even in lower gears depending on the RPM. If you are on an older software, Sport+ closes valves only in higher gears depending on the RPM.
That's true!
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      01-25-2018, 10:21 PM   #17
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Quote:
Originally Posted by SakhirM4 View Post
Mine are always open. Valves are unplugged.
is there a DIY on this cuz i'd like to do it! lol
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      01-26-2018, 11:10 AM   #18
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Quote:
Originally Posted by uniqueMR View Post
I am interested How?
Quote:
Originally Posted by starbai View Post
is there a DIY on this cuz i'd like to do it! lol


http://f80.bimmerpost.com/forums/sho...1&postcount=29

Pull the fuses or pull the plug. Fuses disable other features so I pull the plug.

Link for how to further down that post in that thread.
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      01-26-2018, 11:13 AM   #19
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because it sounds like a rice rocket.
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      01-26-2018, 11:18 AM   #20
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For those of you who are leaving the valves open by pulling the connectors next to the external valve actuators, make sure you wrap/tape the connectors up very well as they are electrical connectors and you don't want them dangling open to the elements. Also, obviously, you would need to make sure valves are in the open position before you pull the plug. I think they stay open when you shut the car off in sport or sport+. Shine a flashlight into the tailpipe and you can see if the valve is open or closed. Pull plug only when exhaust is open or you will have a nice, quiet permanent exhaust note.
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      01-26-2018, 11:35 AM   #21
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Quote:
Originally Posted by Fast4d View Post
because it sounds like a rice rocket.
as the owner of a 93 prelude and 05 S2000 as well as this M3. I'm okay with this
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      01-26-2018, 11:37 AM   #22
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Quote:
Originally Posted by cntzl View Post
Being always in Sport+ doesn't mean valves are always open, just FYI. Especially if you have a recent software, Sport+ closes valves even in lower gears depending on the RPM. If you are on an older software, Sport+ closes valves only in higher gears depending on the RPM.
In which software update did they make this change. Wondering if my 2018 (7/17 production) would fall under what you say is recent software?
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