Too all those that complain about drone

Clap135 · 02-19-2011, 11:49 PM

Have you ever noticed that your car with xx exhaust drones worse on some days rather than others? Well since I got the ap i just pick a parameter to simply watch as i drive to anywhere. Today I noticed something odd and those who drive in colder climates can relate to this.

My wgdc are usually in the 40s-50s at idle and just cruising around, to build part throttle boost they go down into the 20-30s. Well its about 20 degrees outside today an my exhaust note was constantly changing so i started staring at the WGDC to see what it was doing.

My wgdc goes from 4x to 0 when just cruising, it randomly alternates at times. One reason for this is probably because the car tries to warm up the cats, and being that I don't have any, they dont warm up lol. So flashed user, nothign you can do about this. Procede users, if you mess with the WG rattle setting and get it close to 90, it will most likly go away, jb users, no clue how the new jb4 works in regards to controlling the wastegates. So if you have consant drone, and not only when its super cold outside, mess with your wastegate position to quiet the car down. The more closed the wg, the quieter the car will be. Closed meaning higher wgdc.

tofu- · 02-20-2011, 12:04 AM

yeah, i wish the jb4 had an option like this. i read shiv's post about people using the wastegate parameters to tune their exhaust note with minimal detrimental effects

Clap135 · 02-20-2011, 12:05 AM

Quote:

Originally Posted by tofu-

yeah, i wish the jb4 had an option like this. i read shiv's post about people using the wastegate parameters to tune their exhaust note with minimal detrimental effects

Didn't know shiv already explained this, oh well. Maybe other didn't know either.

tofu- · 02-20-2011, 12:06 AM

it was buried in some long thread somewhere

Clap135 · 02-20-2011, 12:12 AM

Well I know how to fix it on the procede cause when I was testing some v5 stuff for shiv, he sent me a map that was configured for his wastegates which rattle really bad. My car was beyond belief stupid loud, so I called him and asked him wtf he changed or if i should get underneath the car and start looking for cracks or leaks lol. I never ran the WG rattle settings cause mine dont really rattle, switched to back to 90 and the car was silent again, well silent compared to what it was at the 30 setting

vasillalov · 02-20-2011, 08:21 AM

I don't know about that... I am fully catless and I run GIAC Stage 1. While, I've not logged the WGDC, the exhaust note does not change randomly when it is cold as you are describing it. It is a bit louder than normal when the engine is started cold in say -10F weather, but quickly quiets down in less than 1 minute of idling.

:

InCityPhoto · 02-20-2011, 09:22 AM

Wouldn't it be easier to buy an exhaust that you actually like the sound?

techlogik · 02-20-2011, 10:00 AM

Quote:

Originally Posted by InCityPhoto

Wouldn't it be easier to buy an exhaust that you actually like the sound?

I think you are missing the point of the thread. Pretty much every exhaust, don't know of one yet, drones.

What he is saying is the wastegate setting might help with tuning the drone out due to the lack of Cats on a full exhaust setup etc....

cstmx_ryder · 02-20-2011, 11:26 AM

I thought shiv told us to LOWER the wgdc if we hear rattling?

So now higher the wgdc number, the quieter the WG gets? And not the other way around like I thought?

TIA

P.S. Mine rattles like chit now.....gonna turn UP the WGDC to see if that helps.....lol

Clap135 · 02-20-2011, 11:57 AM

low number, less rattle, higher number less ehxuast note noises

Jeff@TopGearSolutions · 02-20-2011, 11:58 AM

Rattle and drone are 2 different things being discussed.

cstmx_ryder · 02-20-2011, 01:45 PM

Yes, I'm aware of that....drone is drone, comes with every aftermarket exhaust, it's just how much drone......I'm over that as I'm more interested to keep my WG from rattling....

I just changed the WGDC back to 90% and it seem to have eliminated a lot of the rattle.....that's what gets me....when I had my number lowered, there were more rattles. That made my car sound like chit at a stoplight.....

Quote:

Originally Posted by JPSlick

Rattle and drone are 2 different things being discussed.

InCityPhoto · 02-20-2011, 01:47 PM

Quote:

Originally Posted by techlogik

I think you are missing the point of the thread. Pretty much every exhaust, don't know of one yet, drones.

What he is saying is the wastegate setting might help with tuning the drone out due to the lack of Cats on a full exhaust setup etc....

Oh maybe I did miss the point, I thought he was just trying to poke at other brands for not having certain features.

Clap135 · 02-20-2011, 01:52 PM

Quote:

Originally Posted by InCityPhoto

Oh maybe I did miss the point, I thought he was just trying to poke at other brands for not having certain features.

Where do you people come from....

Dmacc · 02-20-2011, 02:01 PM

I've noticed this on both my stock exhaust when I first bought the car, and on my catless setting. With the jb3/4 and the procede (I've had both) the there is no noticeable drone. But when I wasn't using any software and I was running the stock factory tune, the exhaust note would randomly change, a lot of the times on the freeway, when I was at a constant speed, and without making adjustments to the accelerator, the exhaust tone would drop significantly and the note would be much deeper, on for a a few seconds and then it would go back.

I notice this both running the stock tune with stock exhaust, and catless exhaust. Could this mean there is something wrong with my wastegates? Or has anyone else experienced this on the stock tune?

Jeff@TopGearSolutions · 02-20-2011, 02:08 PM

Ive had these changes in tone tuned on PROcede. Looking at a boost gauge it appears there is also a change in throttle blade angle.

On the vac/boost gauge, with no change in throttle input, I would increase VAC and the exhaust would get noticeably louder. This would be an increase in throttle blade opening, yet there was no change in acceleration.

So there is definitely a correlation between exhaust sound from WG and throttle blade angle actually.

This can be verified with more logging. The problem is, its hard to replicate. Atleast for me.

Dmacc · 02-20-2011, 02:16 PM

Quote:

Originally Posted by JPSlick

Ive had these changes in tone tuned on PROcede. Looking at a boost gauge it appears there is also a change in throttle blade angle.

On the vac/boost gauge, with no change in throttle input, I would increase VAC and the exhaust would get noticeably louder. This would be an increase in throttle blade opening, yet there was no change in acceleration.

So there is definitely a correlation between exhaust sound from WG and throttle blade angle actually.

This can be verified with more logging. The problem is, its hard to replicate. Atleast for me.

Same for me as far as replicating, I've had it happen only once driving on the street, but it has happened Many times while on the freeway, and keep on mind, the car did this bone stock when I got it from the factory with only 92 miles on it.

boom · 02-20-2011, 02:21 PM

while cruising the car will open its exhaust gas recirculation valve and consequently open the throttle. The egr may alter the sound a little as some of the exhaust is recirculated through the motor. I wonder if that's the throttle activity you're noticing.

Dmacc · 02-20-2011, 02:24 PM

Quote:

Originally Posted by boom

while cruising the car will open its exhaust gas recirculation valve and consequently open the throttle. The egr may alter the sound a little as some of the exhaust is recirculated through the motor. I wonder if that's the throttle activity you're noticing.

Will this consequently cause the car to slightly speed up?

In my case the car changes tone, but the revs and speed remain constant.

boom · 02-20-2011, 02:27 PM

It's not supposed to. EGR dilutes the air breathed by the engine so the throttle blade has to open to get more air. An open throttle blade reduces pumping losses and makes an engine more efficient. EGR is an EPA requirement and is probably the biggest contributor to the carbon on the valves of a DI motor. I'd love to delete it and am hoping that COBB can keep it closed all the time.

Jeff@TopGearSolutions · 02-20-2011, 03:56 PM

Quote:

Originally Posted by Dmacc

Same for me as far as replicating, I've had it happen only once driving on the street, but it has happened Many times while on the freeway, and keep on mind, the car did this bone stock when I got it from the factory with only 92 miles on it.

Quote:

Originally Posted by boom

while cruising the car will open its exhaust gas recirculation valve and consequently open the throttle. The egr may alter the sound a little as some of the exhaust is recirculated through the motor. I wonder if that's the throttle activity you're noticing.

Very well could be

Quote:

Originally Posted by Dmacc

Will this consequently cause the car to slightly speed up?

In my case the car changes tone, but the revs and speed remain constant.

Quote:

Originally Posted by boom

It's not supposed to. EGR dilutes the air breathed by the engine so the throttle blade has to open to get more air. An open throttle blade reduces pumping losses and makes an engine more efficient. EGR is an EPA requirement and is probably the biggest contributor to the carbon on the valves of a DI motor. I'd love to delete it and am hoping that COBB can keep it closed all the time.

Yea the car is def more efficient when that throttle blade opens up. Car feels a lot more peppy. Similar feeling to a true N/A engine.

I'm sure it does it stock, but the amount of miles I put on the car stock are slim and about 2 years ago LOL

I get the same change in tone, but revs and speed remain constant.

02-19-2011, 11:49 PM	#1
Clap135 Brigadier General 103 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Too all those that complain about drone Have you ever noticed that your car with xx exhaust drones worse on some days rather than others? Well since I got the ap i just pick a parameter to simply watch as i drive to anywhere. Today I noticed something odd and those who drive in colder climates can relate to this. My wgdc are usually in the 40s-50s at idle and just cruising around, to build part throttle boost they go down into the 20-30s. Well its about 20 degrees outside today an my exhaust note was constantly changing so i started staring at the WGDC to see what it was doing. My wgdc goes from 4x to 0 when just cruising, it randomly alternates at times. One reason for this is probably because the car tries to warm up the cats, and being that I don't have any, they dont warm up lol. So flashed user, nothign you can do about this. Procede users, if you mess with the WG rattle setting and get it close to 90, it will most likly go away, jb users, no clue how the new jb4 works in regards to controlling the wastegates. So if you have consant drone, and not only when its super cold outside, mess with your wastegate position to quiet the car down. The more closed the wg, the quieter the car will be. Closed meaning higher wgdc.
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02-20-2011, 12:04 AM	#2
tofu- Banned 87 Rep 2,854 Posts Drives: 335i Jet Black/Coral Red Join Date: Mar 2010 Location: nyc iTrader: (4)	yeah, i wish the jb4 had an option like this. i read shiv's post about people using the wastegate parameters to tune their exhaust note with minimal detrimental effects
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02-20-2011, 12:06 AM	#4
tofu- Banned 87 Rep 2,854 Posts Drives: 335i Jet Black/Coral Red Join Date: Mar 2010 Location: nyc iTrader: (4)	it was buried in some long thread somewhere
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02-20-2011, 12:12 AM	#5
Clap135 Brigadier General 103 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	Well I know how to fix it on the procede cause when I was testing some v5 stuff for shiv, he sent me a map that was configured for his wastegates which rattle really bad. My car was beyond belief stupid loud, so I called him and asked him wtf he changed or if i should get underneath the car and start looking for cracks or leaks lol. I never ran the WG rattle settings cause mine dont really rattle, switched to back to 90 and the car was silent again, well silent compared to what it was at the 30 setting
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02-20-2011, 08:21 AM	#6
vasillalov Mad Linux Guru On The Loose 1130 Rep 5,404 Posts Drives: 2008 335i Sedan, 2023 M3 Join Date: Aug 2009 Location: Chicago, IL iTrader: (5) Garage List 2023 BMW M3 [0.00] 2008 335i E90 [8.00]	I don't know about that... I am fully catless and I run GIAC Stage 1. While, I've not logged the WGDC, the exhaust note does not change randomly when it is cold as you are describing it. It is a bit louder than normal when the engine is started cold in say -10F weather, but quickly quiets down in less than 1 minute of idling. :
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02-20-2011, 09:22 AM	#7
InCityPhoto Lieutenant 20 Rep 425 Posts Drives: 07' 335I Join Date: Mar 2010 Location: Tampa, FL iTrader: (0)	Wouldn't it be easier to buy an exhaust that you actually like the sound?
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02-20-2011, 11:26 AM	#9
cstmx_ryder Colonel 165 Rep 2,875 Posts Drives: A metal box with a roundel Join Date: Jul 2007 Location: Portland, OR iTrader: (2)	I thought shiv told us to LOWER the wgdc if we hear rattling? So now higher the wgdc number, the quieter the WG gets? And not the other way around like I thought? TIA P.S. Mine rattles like chit now.....gonna turn UP the WGDC to see if that helps.....lol __________________ '08 AW E90 335i PROcede V5 \| BMS DCI \| RR DPs \| ETS FMIC \| FORGE DVs \| Stett CP \| Vanguard \| PSS10
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02-20-2011, 11:57 AM	#10
Clap135 Brigadier General 103 Rep 3,460 Posts Drives: 2009 N54 Join Date: Jul 2009 Location: Sticky's Mom House iTrader: (1)	low number, less rattle, higher number less ehxuast note noises
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02-20-2011, 11:58 AM	#11
Jeff@TopGearSolutions 3442 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Rattle and drone are 2 different things being discussed.
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02-20-2011, 02:01 PM	#15
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	I've noticed this on both my stock exhaust when I first bought the car, and on my catless setting. With the jb3/4 and the procede (I've had both) the there is no noticeable drone. But when I wasn't using any software and I was running the stock factory tune, the exhaust note would randomly change, a lot of the times on the freeway, when I was at a constant speed, and without making adjustments to the accelerator, the exhaust tone would drop significantly and the note would be much deeper, on for a a few seconds and then it would go back. I notice this both running the stock tune with stock exhaust, and catless exhaust. Could this mean there is something wrong with my wastegates? Or has anyone else experienced this on the stock tune? __________________ thanks to MGallop
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02-20-2011, 02:08 PM	#16
Jeff@TopGearSolutions 3442 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Ive had these changes in tone tuned on PROcede. Looking at a boost gauge it appears there is also a change in throttle blade angle. On the vac/boost gauge, with no change in throttle input, I would increase VAC and the exhaust would get noticeably louder. This would be an increase in throttle blade opening, yet there was no change in acceleration. So there is definitely a correlation between exhaust sound from WG and throttle blade angle actually. This can be verified with more logging. The problem is, its hard to replicate. Atleast for me.
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02-20-2011, 02:21 PM	#18
boom My X5d tows my spec miata to the track. 74 Rep 1,254 Posts Drives: 2010 X5 35d Join Date: Sep 2009 Location: USA iTrader: (0)	while cruising the car will open its exhaust gas recirculation valve and consequently open the throttle. The egr may alter the sound a little as some of the exhaust is recirculated through the motor. I wonder if that's the throttle activity you're noticing.
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02-20-2011, 02:27 PM	#20
boom My X5d tows my spec miata to the track. 74 Rep 1,254 Posts Drives: 2010 X5 35d Join Date: Sep 2009 Location: USA iTrader: (0)	It's not supposed to. EGR dilutes the air breathed by the engine so the throttle blade has to open to get more air. An open throttle blade reduces pumping losses and makes an engine more efficient. EGR is an EPA requirement and is probably the biggest contributor to the carbon on the valves of a DI motor. I'd love to delete it and am hoping that COBB can keep it closed all the time.
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