Can 6at make shift sounds like DCT?

Thurston Howell the 3rd · 03-10-2020, 09:40 PM

I've watched every youtube video possible on the subject. They call it a cough, burp, or fart on DCT. Can I make my 6at make crack on shifts like this?

iqraceworks · 03-11-2020, 08:01 AM

I'm sure someone could make a custom tune that would close the throttle in between shifts long enough to make the car "burble" between shifts......but not sure why you would want to do that, it's going to slow the car down.

Diawal91 · 03-11-2020, 08:14 AM

Quote:

Originally Posted by iqraceworks

I'm sure someone could make a custom tune that would close the throttle in between shifts long enough to make the car "burble" between shifts......but not sure why you would want to do that, it's going to slow the car down.

+1

type-dRew · 03-11-2020, 08:32 AM

my car kind of did it with just xhp and a louder exhaust 1-2-3 but not higher gears, but you could not hear it on the inside.

all the timing the car pulls on shifts sort of promotes it, but really its a little extra fueling during the shift that would make it

short answer, no, not really unless specifically tuned for it and most likely not really then either

Wingnutts · 03-11-2020, 08:55 AM

I'm on a custom tune, but I can't say that I ever noticed the between gear flatulence now or on the stock tune.

E30 Racer · 03-11-2020, 09:35 AM

Maybe if your tune has flat shift, where you don't lift throttle when you upshift. My E30 has it via Megasquirt, and it will shoot flames. But it also makes a lot of noise and blows out the muffler.

Bimmer_Engineer · 03-11-2020, 09:45 AM

I bet if you put a 335is badge on the trunklid it would help...

Bimmer_Engineer · 03-12-2020, 02:10 PM

Quote:

Originally Posted by thurstonhowelltha3rd

What if I set my mhd burble settings to about 6k rpms(my shift point)...would that cause fuel to be sprayed into the exhaust while shifting?

This sounds like a great idea...please post a vid afterwards so we can see how well it worked out...

type-dRew · 03-12-2020, 02:53 PM

i regret replying to this

Quote:

Originally Posted by thurstonhowelltha3rd

What if I set my mhd burble settings to about 6k rpms(my shift point)...would that cause fuel to be sprayed into the exhaust while shifting?

Thurston Howell the 3rd · 03-12-2020, 03:31 PM

Quote:

Originally Posted by type-dRew

i regret replying to this

Why? Bad idea?

iqraceworks · 03-12-2020, 03:33 PM

Quote:

Originally Posted by thurstonhowelltha3rd

What if I set my mhd burble settings to about 6k rpms(my shift point)...would that cause fuel to be sprayed into the exhaust while shifting?

So you are willing to possibly damage your motor in order to make your car pop during shifts like a DCT car?

Just guessing here....but I bet you are 16 aren't you?

rjahl · 03-12-2020, 05:01 PM

I spent a bunch of time writing transmission tunes for my older Z4 E85 so I was really interested to know how my "new" E89 DCT shifted so quickly.

I initially thought the DME was closing the throttle but my logs showed otherwise. I found no throttle events during normal up-shifts. I'm Pretty sure, the faster shifts are made possible through better torque reduction management through more timing control and less inertia / rotating mass.

I do see some throttle closing from the boost management side of things but that's easily spotted.

03-10-2020, 09:40 PM	#1
Thurston Howell the 3rd Private First Class 72 Rep 193 Posts Drives: F80 M3 Join Date: Oct 2015 Location: Murrieta, CA iTrader: (0)	Can 6at make shift sounds like DCT? I've watched every youtube video possible on the subject. They call it a cough, burp, or fart on DCT. Can I make my 6at make crack on shifts like this? __________________ COILOVERS AND EXHAUST Last edited by Thurston Howell the 3rd; 03-10-2020 at 09:41 PM.. Reason: Yyhh
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03-11-2020, 08:01 AM	#2
iqraceworks Brigadier General 2098 Rep 3,811 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	I'm sure someone could make a custom tune that would close the throttle in between shifts long enough to make the car "burble" between shifts......but not sure why you would want to do that, it's going to slow the car down. __________________ 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 transmission flash, RB Two Turbos....10.90 @ 128mph
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03-11-2020, 08:32 AM	#4
type-dRew Major 642 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	my car kind of did it with just xhp and a louder exhaust 1-2-3 but not higher gears, but you could not hear it on the inside. all the timing the car pulls on shifts sort of promotes it, but really its a little extra fueling during the shift that would make it short answer, no, not really unless specifically tuned for it and most likely not really then either __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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03-11-2020, 08:55 AM	#5
Wingnutts Old Guy 135 Rep 305 Posts Drives: 335is DCT Join Date: Jun 2012 Location: PA iTrader: (0) Garage List 2019 X4 M40i [0.00] 2011 335is [0.00] 2010 X5 35d [0.00] 2009 E92 328i xdrive [0.00]	I'm on a custom tune, but I can't say that I ever noticed the between gear flatulence now or on the stock tune. __________________ BQ tune, Flex Fuel, more mods and money that I'll never tell my wife about....
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03-11-2020, 09:35 AM	#6
E30 Racer Captain 223 Rep 696 Posts Drives: '11 1M, '09 335i M Sport Join Date: Aug 2011 Location: Ohio iTrader: (2)	Maybe if your tune has flat shift, where you don't lift throttle when you upshift. My E30 has it via Megasquirt, and it will shoot flames. But it also makes a lot of noise and blows out the muffler.
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03-11-2020, 09:45 AM	#7
Bimmer_Engineer Lieutenant Colonel 1049 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	I bet if you put a 335is badge on the trunklid it would help... Last edited by Bimmer_Engineer; 03-11-2020 at 12:57 PM..
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03-12-2020, 05:01 PM	#12
rjahl Colonel 1002 Rep 2,287 Posts Drives: Z4 35is Join Date: Jun 2011 Location: Tampa iTrader: (0) Garage List 2012 Z4 35is [0.00]	I spent a bunch of time writing transmission tunes for my older Z4 E85 so I was really interested to know how my "new" E89 DCT shifted so quickly. I initially thought the DME was closing the throttle but my logs showed otherwise. I found no throttle events during normal up-shifts. I'm Pretty sure, the faster shifts are made possible through better torque reduction management through more timing control and less inertia / rotating mass. I do see some throttle closing from the boost management side of things but that's easily spotted.
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