Exhaust Valve Mod Comparison Video - Dueling F80 M3s

Hawaii i8 · 01-30-2015, 05:46 PM

Quote:

Originally Posted by Accel Junky

These are from my video. The tab is on top of the plug. You press down on it and it unhooks from the nub on the receptacle. Helps to rock the plug left and right as you pull back and press the tab simultaneously.

Ok thanks I will try that

castilla · 02-06-2015, 05:19 AM

Does this mod makes power/torque loss?

Accel Junky · 02-06-2015, 07:28 AM

Quote:

Originally Posted by castilla

Does this mod makes power/torque loss?

Under full throttle your valves should be open whether you have the mod or not so I don't think it affects peak power/torque in that sense.

What we don't know yet is any effect it might have driving part throttle. Maybe the flaps create back pressure for quicker part throttle spooling...no idea.

I can tell you this...I drive my wife's unmodded F80 back to back pretty often and I can't tell a difference by seat of pants.

The only thing I haven't been able to substantiate yet is her computer MPG vs actual is closer than mine (despite her mileage being worse because of her in town commute). My MPG actual has been about 5-10% off of the computer reading. Could be the two cars or maybe there is something to the valves...

castilla · 02-06-2015, 08:43 AM

Quote:

Originally Posted by Accel Junky

Under full throttle your valves should be open whether you have the mod or not so I don't think it affects peak power/torque in that sense.

What we don't know yet is any effect it might have driving part throttle. Maybe the flaps create back pressure for quicker part throttle spooling...no idea.

I can tell you this...I drive my wife's unmodded F80 back to back pretty often and I can't tell a difference by seat of pants.

The only thing I haven't been able to substantiate yet is her computer MPG vs actual is closer than mine (despite her mileage being worse because of her in town commute). My MPG actual has been about 5-10% off of the computer reading. Could be the two cars or maybe there is something to the valves...

Thanks.On full throttle you are right but maybe in low rpm's it makes some torque loss and its affects mpg value..

Kief · 02-08-2015, 02:03 PM

Anyone get this?
http://www.x-ph.com/bms-f-series-can-flap-module/

SaMaster14 · 02-08-2015, 06:17 PM

Thanks for the video! Will definitely be doing this when my car comes in

Bahn360Photo · 02-09-2015, 08:29 AM

thank you!

castilla · 02-10-2015, 08:25 AM

Quote:

Originally Posted by Kief

Anyone get this?
http://www.x-ph.com/bms-f-series-can-flap-module/

Too expensive for such a basic operation

psedog · 05-07-2015, 10:37 PM

I'll definitely be doing this when I get my M. I straight piped past my muffler in my G35. So, I don't give a damn about my neighbors, lol. The resonators keep the sound quiet enough though, to be honest.

Woodengun · 06-02-2015, 01:37 PM

I pulled the harnesses a few days ago with valves in open position.

F82 with HK sound and ASD module unplugged. DCT.

The car does drone a bit at highway speeds - but it is very low level drone if you are 85 or slower on flats. Even at 95-100 the drone is no where near as loud as a Boeing/Airbus jetliner ride.

If you're cruising faster than that I'd think exhaust noise is of no concern. All you're concentrating on is driving and looking out for the 5-0.

Cold start is definitely louder than with closed valves but not that bad. I'm sure I wake my neighbors since the weather is getting warmer and they probably have windows open. Its not like the closed valve cold start is quiet so I'm pretty sure it makes no significant difference - open or closed valves.

AM4ZING · 06-02-2015, 01:39 PM

Quote:

Originally Posted by Woodengun

I pulled the harnesses a few days ago with valves in open position.

F82 with HK sound and ASD module unplugged. DCT.

The car does drone a bit at highway speeds - but it is very low level drone if you are 85 or slower on flats. Even at 95-100 the drone is no where near as loud as a Boeing/Airbus jetliner ride.

If you're cruising faster than that I'd think exhaust noise is of no concern. All you're concentrating on is driving and looking out for the 5-0.

Cold start is definitely louder than with closed valves but not that bad. I'm sure I wake my neighbors since the weather is getting warmer and they probably have windows open. Its not like the closed valve cold start is quiet so I'm pretty sure it makes no significant difference - open or closed valves.

Do you have an exhaust?

Woodengun · 06-02-2015, 01:40 PM

Just the standard exhaust. I would have thought aftermarket exhaust would all delete the valves.

castilla · 06-09-2015, 12:26 PM

Where did you taped the plugs after you unplug them?? To the heat shield or somwhere else?

Accel Junky · 06-11-2015, 06:19 AM

Quote:

Originally Posted by castilla

Where did you taped the plugs after you unplug them?? To the heat shield or somwhere else?

I think I just looped them back on their wires where they are clipped into the heat shield.

Powaup · 06-11-2015, 11:23 AM

I have a little drone if I'm in the wrong gear but it never bothers me at all

bqduong · 04-12-2016, 02:21 PM

A few other videos of what it sounds like with the mod:

frankiebones · 06-28-2016, 01:01 PM

Just got my '16 F80 in manual trans. anyone know if they made any modifications to the MY2016 that would prevent this? i came across this thread and am basically car illiterate and want to make sure this is something i can handle on my own, having never attempted any car work in my entire life.....thanks guys!

frankiebones · 06-29-2016, 12:49 PM

anyone do this to their 2016 M3/M4? all the responses seem relegated to the 2015 MY. thanks!

JamesGames · 06-29-2016, 09:09 PM

Quote:

Originally Posted by frankiebones

anyone do this to their 2016 M3/M4? all the responses seem relegated to the 2015 MY. thanks!

No difference

psedog · 07-02-2016, 11:16 PM

Mine is a 2016 and it's the same. I had run mine with them unplugged since I took delivery in September. I just plugged them back in because I have a JB4 now which can control them.

Tonyfsu21 · 07-05-2016, 07:29 PM

What about ZCP? Exhaust is slightly different I believe. Anyone done this mod on a 2016 w/ ZCP?

LOW4LYF · 07-25-2016, 06:54 AM

Quote:

Originally Posted by nasdaq100

I have no explanation about the performance. I didn't feel it either, just my VBOX show some better results with the plugs connected. I have tried many many times to make sure and the result was always the same. I end up to let them plugged because I drive most of the time in sport so the differences are not that noticeable expect in 4th gear and up when the valves remains closed. I did 900 km on a highway with the valves opened and an Advil was necessary

As long I know.... when the plugs are not connected, the ECU get a memory fault and reduce the boost... with unpluged valves you should use a resistor to avoid the ECU memory fault...

View Poll Results: Do you have drone WITH the valve mod?
YES, I have a DCT and have drone WITH the valve mod.	29	36.71%
YES, I have a 6MT and have drone WITH the valve mod.	4	5.06%
NO, I have a DCT and DO NOT have drone WITH the valve mod.	16	20.25%
NO, I have a 6MT and DO NOT have drone WITH the valve mod.	30	37.97%
Voters: 79. You may not vote on this poll

02-06-2015, 05:19 AM	#178
castilla Second Lieutenant 51 Rep 230 Posts Drives: 2014 M4 Join Date: Mar 2012 Location: tr iTrader: (0)	Does this mod makes power/torque loss?
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02-08-2015, 02:03 PM	#181
Kief Major General 4440 Rep 5,733 Posts Drives: '24 iX50; '23 i4 M50 Join Date: Dec 2009 Location: Vereinigte Staaten von Amerika iTrader: (26)	Anyone get this? http://www.x-ph.com/bms-f-series-can-flap-module/ __________________ __________________ '24-I20 iX 50; '23-G26 i4 M50; '22-G82 M4Cx;20-G05 M50i; '20-F82 M4CS; '18-F80 M3CS; '18-F80 M3CS; '18-F85 X5M; '18-G01 X3M40i; '18-F80 M3ZCP; '17-F80 M3ZCP; '15-F15 X5; '15-F82 M4; '12-E92 335is; '11-E70 X5d; '11-E89 Z435is;'09-E89 Z435i; '08-E92 335i; '06-E90 330i; '05-E83 X3; '04-E83 X3; '03-E46 325Ci* *retired
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02-08-2015, 06:17 PM	#182
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]	Thanks for the video! Will definitely be doing this when my car comes in __________________ 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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02-09-2015, 08:29 AM	#183
Bahn360Photo Fitness Gene 1113 Rep 2,413 Posts Drives: 2018 M4 Join Date: Feb 2014 Location: SoFlo iTrader: (2) Garage List 2006 bmw m5 [10.00] 2016 bmw z4 35is [8.33] 2000 bmw m5 [10.00] 2018 BMW M4 [10.00] 1987 BMW 325 Conver ... [10.00]	thank you! __________________ Effective 11 Min Home Workouts????? No equipment????? 20 years of experience Spartan Race winner PROtrainer! Click the link?? https://www.youtube.com/c/FitnessGene
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05-07-2015, 10:37 PM	#185
psedog Captain 483 Rep 812 Posts Drives: '16 AB 6MT F80 Join Date: May 2015 Location: San Diego iTrader: (3)	I'll definitely be doing this when I get my M. I straight piped past my muffler in my G35. So, I don't give a damn about my neighbors, lol. The resonators keep the sound quiet enough though, to be honest.
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06-02-2015, 01:37 PM	#186
Woodengun Lieutenant 310 Rep 408 Posts Drives: Yugo Join Date: Apr 2015 Location: Norcal iTrader: (0)	I pulled the harnesses a few days ago with valves in open position. F82 with HK sound and ASD module unplugged. DCT. The car does drone a bit at highway speeds - but it is very low level drone if you are 85 or slower on flats. Even at 95-100 the drone is no where near as loud as a Boeing/Airbus jetliner ride. If you're cruising faster than that I'd think exhaust noise is of no concern. All you're concentrating on is driving and looking out for the 5-0. Cold start is definitely louder than with closed valves but not that bad. I'm sure I wake my neighbors since the weather is getting warmer and they probably have windows open. Its not like the closed valve cold start is quiet so I'm pretty sure it makes no significant difference - open or closed valves.
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06-02-2015, 01:40 PM	#188
Woodengun Lieutenant 310 Rep 408 Posts Drives: Yugo Join Date: Apr 2015 Location: Norcal iTrader: (0)	Just the standard exhaust. I would have thought aftermarket exhaust would all delete the valves.
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06-09-2015, 12:26 PM	#189
castilla Second Lieutenant 51 Rep 230 Posts Drives: 2014 M4 Join Date: Mar 2012 Location: tr iTrader: (0)	Where did you taped the plugs after you unplug them?? To the heat shield or somwhere else?
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06-11-2015, 11:23 AM	#191
Powaup Brigadier General 1253 Rep 3,688 Posts Drives: 2021 Supra 3.0 (Past: 2015 M23 Join Date: Aug 2012 Location: San Francisco, CA iTrader: (0) Garage List 2015 BMW M4 [10.00]	I have a little drone if I'm in the wrong gear but it never bothers me at all __________________ Check out my YouTube Channel Powaup Instagram: @ Powaup
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04-12-2016, 02:21 PM	#192
bqduong Registered 0 Rep 4 Posts Drives: '16 F80 LCI Join Date: Aug 2015 Location: SF Bay Area iTrader: (0)	A few other videos of what it sounds like with the mod:
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06-28-2016, 01:01 PM	#193
frankiebones Brigadier General 5299 Rep 3,056 Posts Drives: Fire Orange G80 6MT Join Date: Mar 2016 Location: Long Island, NY iTrader: (0)	Just got my '16 F80 in manual trans. anyone know if they made any modifications to the MY2016 that would prevent this? i came across this thread and am basically car illiterate and want to make sure this is something i can handle on my own, having never attempted any car work in my entire life.....thanks guys! __________________ Fire Orange 6MT G80 (Miss July, 2021 Cover of Bimmerpost) SMB M3 CS (gone) YMB F80 6MT (gone)
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06-29-2016, 12:49 PM	#194
frankiebones Brigadier General 5299 Rep 3,056 Posts Drives: Fire Orange G80 6MT Join Date: Mar 2016 Location: Long Island, NY iTrader: (0)	Still works on 2016 MY? anyone do this to their 2016 M3/M4? all the responses seem relegated to the 2015 MY. thanks! __________________ Fire Orange 6MT G80 (Miss July, 2021 Cover of Bimmerpost) SMB M3 CS (gone) YMB F80 6MT (gone)
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07-02-2016, 11:16 PM	#196
psedog Captain 483 Rep 812 Posts Drives: '16 AB 6MT F80 Join Date: May 2015 Location: San Diego iTrader: (3)	Mine is a 2016 and it's the same. I had run mine with them unplugged since I took delivery in September. I just plugged them back in because I have a JB4 now which can control them. __________________ 2016 Azurite Black F80 6MT
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07-05-2016, 07:29 PM	#197
Tonyfsu21 Second Lieutenant 169 Rep 276 Posts Drives: 2011 E92 M3, Jet Black, ZCP Join Date: Mar 2012 Location: Fort Lauderdale, FL iTrader: (0)	What about ZCP? Exhaust is slightly different I believe. Anyone done this mod on a 2016 w/ ZCP?
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