Can the exhaust valve mod be bad for the car?

SaMaster14 · 02-16-2015, 11:45 AM

Sorry if this has been discussed before, but I'm highly considering doing the exhaust valve mod (making the flaps open all of the time).

I am just wondering if there could be any repercussions; I mean BMW must have made it so the flaps open and close for a reason.

Any comments? Thanks guys!

NorCal f80 · 02-16-2015, 11:46 AM

Quote:

Originally Posted by SaMaster14

I mean BMW must have made it so the flaps open and close for a reason.

Because cold start is so damn loud with valves open.

SaMaster14 · 02-16-2015, 12:23 PM

Quote:

Originally Posted by 0-100 real quick

Because cold start is so damn loud with valves open.

If that's the only reason, I'm game

No problems with loud!

parky1215 · 02-16-2015, 12:42 PM

It's also there to eliminate drone.
With valve always open, you will get drone even on stock exhaust (between 1.8-2.1k rpm).

tom @ eas · 02-16-2015, 01:08 PM

Quote:

Originally Posted by SaMaster14

Sorry if this has been discussed before, but I'm highly considering doing the exhaust valve mod (making the flaps open all of the time).

I am just wondering if there could be any repercussions; I mean BMW must have made it so the flaps open and close for a reason.

Any comments? Thanks guys!

No harm at all. Either unplug the valves or install the Macht Schnell EVC module to have control at will.

E92 nick · 02-28-2015, 11:43 AM

I have the macht schnell on my fab speed exhaust and control it with the button on my turn signal have no complaints at all

castilla · 02-28-2015, 12:31 PM

Does it easy to unplug the plugs and re plug them if i change my ming about this mod? I want to do this mod but i m not sure

NorCal f80 · 02-28-2015, 01:04 PM

Quote:

Originally Posted by castilla

Does it easy to unplug the plugs and re plug them if i change my ming about this mod? I want to do this mod but i m not sure

Yea, easily unplugs once you learn the technique on how to unclip.

M4LAKA · 02-28-2015, 04:36 PM

Just a lot of drone with catless downpipes. I got annoyed and took it off. Plus button completely makes its actual use impossible.

supremepower · 02-28-2015, 05:08 PM

You can get the can flap module by burger tuning for $200 if you don't plan on getting downpipes

No harm to your car with the valves open

02-16-2015, 11:45 AM	#1
SaMaster14 Brigadier General 4439 Rep 3,866 Posts Drives: '23 G80 M3C xDrive; '13 e92 M3 Join Date: Mar 2012 Location: Southern California iTrader: (0) Garage List 2013 BMW M3 [8.50] 2023 BMW M3 Competi ... [10.00]	Can the exhaust valve mod be bad for the car? Sorry if this has been discussed before, but I'm highly considering doing the exhaust valve mod (making the flaps open all of the time). I am just wondering if there could be any repercussions; I mean BMW must have made it so the flaps open and close for a reason. Any comments? Thanks guys! __________________ 2023 G80 M3 Competition xDrive Isle of Man Green on Kyalami Orange full leather - 826M black wheels - Carbon Fiber Trim - Carbon Bucket Seats - Executive/Driving Assist/Parking Packages - Laserlight - M Shadowline Lights - M Drive Pro - CS Trans/Diff/Steering Coding 2013 E92 M3 Mineral White on Bamboo Beige noviello leather (Base w/ Nav, Comfort Access, Lighting Pack) - DINAN Stage 1 and Free Flow Axle-Back Exhaust
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02-16-2015, 12:42 PM	#4
parky1215 Lieutenant Colonel 564 Rep 1,983 Posts Drives: F90 M5C \| G06 X6 M60i Join Date: Nov 2010 Location: Rancho Cucamonga, CA iTrader: (13)	It's also there to eliminate drone. With valve always open, you will get drone even on stock exhaust (between 1.8-2.1k rpm).
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02-28-2015, 11:43 AM	#6
E92 nick Captain 76 Rep 613 Posts Drives: Melbourne e92 M3 Join Date: Nov 2010 Location: North Port, FL iTrader: (1) Garage List 2012 BMW M3 [10.00] 1998 bmw [0.00]	I have the macht schnell on my fab speed exhaust and control it with the button on my turn signal have no complaints at all
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02-28-2015, 12:31 PM	#7
castilla Second Lieutenant 51 Rep 230 Posts Drives: 2014 M4 Join Date: Mar 2012 Location: tr iTrader: (0)	Does it easy to unplug the plugs and re plug them if i change my ming about this mod? I want to do this mod but i m not sure
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02-28-2015, 04:36 PM	#9
M4LAKA Lieutenant 114 Rep 424 Posts Drives: 2022 M5 Comp Join Date: May 2014 Location: Toronto iTrader: (0)	Just a lot of drone with catless downpipes. I got annoyed and took it off. Plus button completely makes its actual use impossible.
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02-28-2015, 05:08 PM	#10
supremepower Supreme Leader 2284 Rep 6,548 Posts Drives: G80, 996GT2, 996TT, 991RS 356b Join Date: Jun 2006 Location: Fullerton, CA So.Cal. iTrader: (15)	You can get the can flap module by burger tuning for $200 if you don't plan on getting downpipes No harm to your car with the valves open __________________ **SupremePOWER** 1562 Kimberly Ave Fullerton CA 92831 Contact: sales@supremepower.com :: Shop# (714)632-1951 Sales & service of BBS Street & Motorsport products. BBS Highest Volume Dealer 2015 thru 2022 All the top brands at the prices and service you can count on. Professional installation.
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