e92 exhaust bypass valve

RiXst3r · 11-07-2006, 10:35 PM

Is the golf tee mod possible on the e92 335?

OpenFlash · 11-07-2006, 10:37 PM

Quote:

Originally Posted by RiXst3r

Is the golf tee mod possible on the e92 335?

Yes.

RiXst3r · 11-07-2006, 10:38 PM

Quote:

Originally Posted by shiv@vishnu

Yes.

Anyone know what difference in sound this makes for the 335?

RiXst3r · 11-08-2006, 07:53 AM

Nobody has done this to a stock 335i exhaust yet, that can compare before and after?

RiXst3r · 11-08-2006, 08:21 AM

Quote:

Originally Posted by NaViT

prolly not bro give it a few weeks maybe

Maybe i need to be the one to do it, and post my results...

OpenFlash · 11-08-2006, 11:24 AM

With the exhaust bypass open (vacuum hose pulled off the actuator on the driver's side exhaust tip), the car will be slightly louder at idle and cruise. It will sound the same under boost. Try it. It takes 10 seconds to do and easy to put back to stock if you don't like it.

-shiv

11-08-2006, 12:03 PM

does this mod have any affect on performance?

RiXst3r · 11-08-2006, 12:05 PM

Quote:

Originally Posted by jjw3477

does this mod have any affect on performance?

The car might idle a bit stronger, but i doubt it... i would say sound only

trick50 · 11-08-2006, 02:05 PM

Quote:

Originally Posted by RiXst3r

The car might idle a bit stronger, but i doubt it... i would say sound only

can someone please explain in detail what this "golf Tee" thing is, and how to do it?

Thanks

Borti · 11-08-2006, 02:23 PM

Quote:

Originally Posted by trick50

can someone please explain in detail what this "golf Tee" thing is, and how to do it?

Thanks

Pull the vacuum tube off of the solenoid attached to your driver's side muffler and plug it with a golf tee and zip tie it off somewhere if you can... Atleast that is how you did it on the R32.

trick50 · 11-08-2006, 04:28 PM

Quote:

Originally Posted by Borti

Pull the vacuum tube off of the solenoid attached to your driver's side muffler and plug it with a golf tee and zip tie it off somewhere if you can... Atleast that is how you did it on the R32.

So....this hose is right in the back of the car...by the muffler? Does it help performance at all? Will it make the exhaust dramatically louder? I guess I will just try for myself whenever the rain stops here and we have a relativly warm day.
As long as it does not hurt performance./

ehhhwik · 11-08-2006, 04:32 PM

Does this "golf-tee" mod possible for e92 328i? Ive looked at the muffler in my car and i dont see any vaccume tube close to my muffler

///Matt · 11-08-2006, 04:39 PM

it makes the car VERY slightly louder. There will be a deeper tone at low to medium low rpm. There should be NO performance gain. At higher RPMs, the flap is open ANYWAY. at LOWER RPM you may actually LOSE some torque. The flap is designed to decrease noise AND increase backpressure at low RPM. This backpressure increase is designed to help low end torque.

Also guys.... You should take a look at the flap with the car OFF and the hose unplugged.

Some of BMW's cars are a little backwards. For instance, on the E65, early in production the valve was closed by vacuum, so if you unplugged it, it would be always open. But then they changed it so that it's OPENED by vacuum, so if you unplugged it, it'd never open! (I may be backwards, it MAY have gone from vacuum open to vacuum close. Doesn't change the statement!)
I don't beleive the 328 HAS the exhaust flap.

Chio · 12-10-2006, 07:55 PM

Going to do this this week!!!

Definitive · 06-07-2007, 10:15 PM

So does anyone know if the 328 coupe have this flap?

Definitive

E90Fleet · 06-08-2007, 03:24 AM

Quote:

Originally Posted by Definitive

So does anyone know if the 328 coupe have this flap?

Definitive

No, it does not have it

Only 330i and 335i have

Booster · 06-11-2007, 06:31 PM

Did it this weekend...

Took around 10 seconds...

Louder at idle and a little louder under throttle to around 3500 RPM.... Nothing drastic...

BoostedBMW · 06-11-2007, 08:37 PM

Quote:

Originally Posted by ///Matt

it makes the car VERY slightly louder. There will be a deeper tone at low to medium low rpm. There should be NO performance gain. At higher RPMs, the flap is open ANYWAY. at LOWER RPM you may actually LOSE some torque. The flap is designed to decrease noise AND increase backpressure at low RPM. This backpressure increase is designed to help low end torque.

Also guys.... You should take a look at the flap with the car OFF and the hose unplugged.

Some of BMW's cars are a little backwards. For instance, on the E65, early in production the valve was closed by vacuum, so if you unplugged it, it would be always open. But then they changed it so that it's OPENED by vacuum, so if you unplugged it, it'd never open! (I may be backwards, it MAY have gone from vacuum open to vacuum close. Doesn't change the statement!)
I don't beleive the 328 HAS the exhaust flap.

I'm not too sure if you would lose torque on the 335 though since back pressure really has no benefit with a turbo engine. If anything, less back pressure would mean faster spool, but the difference either way from an exhaust flap shouldn't be too large in any case.

E90330iS · 06-17-2007, 03:51 AM

Did it on my 330i and my brother's E92 335i both sound a little louder at low RPM, at around 2000 is the most obvious.

BayernMuenchen · 06-17-2007, 10:18 AM

it just sounds different (better in my opinion). It's easy to just try and put back if you don't like the change. All it takes is the tee (or a screw is what I used) and a ziptie.

11-07-2006, 10:35 PM	#1
RiXst3r 273 Rep 6,510 Posts Drives: M235i Join Date: Sep 2006 Location: Ohio iTrader: (14)	e92 exhaust bypass valve - 335i Is the golf tee mod possible on the e92 335?
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11-08-2006, 07:53 AM	#4
RiXst3r 273 Rep 6,510 Posts Drives: M235i Join Date: Sep 2006 Location: Ohio iTrader: (14)	Nobody has done this to a stock 335i exhaust yet, that can compare before and after?
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11-08-2006, 11:24 AM	#6
OpenFlash 1736 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	With the exhaust bypass open (vacuum hose pulled off the actuator on the driver's side exhaust tip), the car will be slightly louder at idle and cruise. It will sound the same under boost. Try it. It takes 10 seconds to do and easy to put back to stock if you don't like it. -shiv
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11-08-2006, 12:03 PM	#7
jjw3477 Guest 0 Rep n/a Posts Drives:	does this mod have any affect on performance?
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11-08-2006, 04:32 PM	#12
ehhhwik Brigadier General 114 Rep 3,431 Posts Drives: 09' BMW 335d, 07' BMW E92 328i Join Date: Oct 2006 Location: Vancouver, BC iTrader: (5)	Does this "golf-tee" mod possible for e92 328i? Ive looked at the muffler in my car and i dont see any vaccume tube close to my muffler
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11-08-2006, 04:39 PM	#13
///Matt United States Marine 316 Rep 2,748 Posts Drives: 2007 Dodge Ram 1500 Join Date: Jul 2006 Location: Los Angeles iTrader: (8) Garage List 2006 330i [0.00]	it makes the car VERY slightly louder. There will be a deeper tone at low to medium low rpm. There should be NO performance gain. At higher RPMs, the flap is open ANYWAY. at LOWER RPM you may actually LOSE some torque. The flap is designed to decrease noise AND increase backpressure at low RPM. This backpressure increase is designed to help low end torque. Also guys.... You should take a look at the flap with the car OFF and the hose unplugged. Some of BMW's cars are a little backwards. For instance, on the E65, early in production the valve was closed by vacuum, so if you unplugged it, it would be always open. But then they changed it so that it's OPENED by vacuum, so if you unplugged it, it'd never open! (I may be backwards, it MAY have gone from vacuum open to vacuum close. Doesn't change the statement!) I don't beleive the 328 HAS the exhaust flap.
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12-10-2006, 07:55 PM	#14
Chio Lieutenant 106 Rep 560 Posts Drives: G80 M3 Comp Xdrive Join Date: Oct 2006 Location: STL iTrader: (1) Garage List 2018 S6 [10.00]	Going to do this this week!!!
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06-07-2007, 10:15 PM	#15
Definitive definitivecars.com 353 Rep 3,833 Posts Drives: Elsa - 2015 F80 M3 - YMB/SS Join Date: Aug 2006 Location: So Cal iTrader: (3) Garage List 2011 E90 M3 [6.66] 2009 (Lease up Sept ... [0.00] 2007 (Lease up 6/19 ... [0.00] 2007 (Lease up Octo ... [0.00]	So does anyone know if the 328 coupe have this flap? Definitive
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06-11-2007, 06:31 PM	#17
Booster Pave The Rainforest 269 Rep 1,197 Posts Drives: Wagon Join Date: Dec 2005 Location: Norfolk, VA iTrader: (33) Garage List 2007 335i Coupe [0.00]	Did it this weekend... Took around 10 seconds... Louder at idle and a little louder under throttle to around 3500 RPM.... Nothing drastic... __________________ Sold: 2015 Pyrite Brown M3 Sold: 2020 Sunset Orange M340i Xdrive Sold: 2021 Bluestone 540i Xdrive Msport
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06-17-2007, 03:51 AM	#19
E90330iS Major General 143 Rep 6,333 Posts Drives: BMW M4 Join Date: Jan 2006 Location: Arcadia, California iTrader: (56) Garage List 2006 330i [0.00]	Did it on my 330i and my brother's E92 335i both sound a little louder at low RPM, at around 2000 is the most obvious. __________________ 2017 BMW M4 DCT Lease Transfer: https://f80.bimmerpost.com/forums/sh...8#post23736398
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06-17-2007, 10:18 AM	#20
BayernMuenchen Second Lieutenant 13 Rep 247 Posts Drives: 2007 335i Coupe Join Date: Nov 2006 Location: Encinitas, CA iTrader: (0)	it just sounds different (better in my opinion). It's easy to just try and put back if you don't like the change. All it takes is the tee (or a screw is what I used) and a ziptie. __________________ 2007 335i Coupe
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