disabled active sound (with valve controller), so quiet now it's shocking

stevehifi · 07-14-2017, 05:18 PM

Hey Guys,

I recently installed a Macht snell valve controller and disabled the active sound. I was shocked how quiet the car was after.. and how little of the exhaust or engine sound you actual hear. I can see why BMW went to great lengths to use the speakers to correct this.

Even with the valves fully open on the exhaust, you only get a loud rasp at WOT.. other than that there's not much drama when you rev in the middle of the RPM band.

Pretty sad actually, would it of really been that hard to pipe in some intake noise (I know turbos make the engine quiet), but a tube running from the manifold to the firewall could of worked.

Anyways.. I can see why now everyone upgrades the exhaust.

Steve

gatorfast · 07-14-2017, 08:26 PM

I think the stock exhaust with valves open and active sound disabled sounds great. Plenty of exhaust noise inside the cabin for me. The exhaust note actually matches the engine rpms which is nice. With the active sound on it's just the same constant sound.

knightarmor · 07-14-2017, 11:10 PM

How many miles on your car? I've noticed my setup getting slightly louder over time (recently passed 6,000 miles on mine). I have also noticed it gets louder as the engine gets warmer. I also removed the ASD module and prefer the car this way.

stevehifi · 07-15-2017, 01:51 PM

About 9k on my car. I think I can live with valves fully open and active sound at this point. Louder exhaust only impresses people outside.

07-14-2017, 05:18 PM	#1
stevehifi Captain 528 Rep 855 Posts Drives: 17 F80 M3 ZCP Join Date: May 2008 Location: Irvine,CA iTrader: (5)	disabled active sound (with valve controller), so quiet now it's shocking Hey Guys, I recently installed a Macht snell valve controller and disabled the active sound. I was shocked how quiet the car was after.. and how little of the exhaust or engine sound you actual hear. I can see why BMW went to great lengths to use the speakers to correct this. Even with the valves fully open on the exhaust, you only get a loud rasp at WOT.. other than that there's not much drama when you rev in the middle of the RPM band. Pretty sad actually, would it of really been that hard to pipe in some intake noise (I know turbos make the engine quiet), but a tube running from the manifold to the firewall could of worked. Anyways.. I can see why now everyone upgrades the exhaust. Steve
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07-14-2017, 08:26 PM	#2
gatorfast Major General 4998 Rep 6,863 Posts Drives: 718 Cayman Join Date: Jan 2008 Location: SoFla iTrader: (4)	I think the stock exhaust with valves open and active sound disabled sounds great. Plenty of exhaust noise inside the cabin for me. The exhaust note actually matches the engine rpms which is nice. With the active sound on it's just the same constant sound.
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07-14-2017, 11:10 PM	#3
knightarmor Lieutenant Colonel 855 Rep 1,555 Posts Drives: 2017 M3 Join Date: Jan 2015 Location: Washington iTrader: (2)	How many miles on your car? I've noticed my setup getting slightly louder over time (recently passed 6,000 miles on mine). I have also noticed it gets louder as the engine gets warmer. I also removed the ASD module and prefer the car this way.
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07-15-2017, 01:51 PM	#4
stevehifi Captain 528 Rep 855 Posts Drives: 17 F80 M3 ZCP Join Date: May 2008 Location: Irvine,CA iTrader: (5)	About 9k on my car. I think I can live with valves fully open and active sound at this point. Louder exhaust only impresses people outside.
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