JB4 N55 DCT sport button

NJ1 · 10-14-2013, 08:50 PM

Ok, so I know there is a million and one threads about the JB4. But I couldn't seem to find the answer to what I was looking for.

Does the sport button become useless once the JB4 is installed? Would it only function when you are running the stock map?

Nugget · 10-14-2013, 09:03 PM

What does it do normally? I can't notice a difference but I always have it in manual mode.
Also I don't think piggybacks are good for the DCT long term as the transmission isn't getting proper torque values. I know mine feels a lot crisper without the JB4 installed.

NJ1 · 10-14-2013, 09:08 PM

Quote:

Originally Posted by Nugget

What does it do normally? I can't notice a difference but I always have it in manual mode.
Also I don't think piggybacks are good for the DCT long term as the transmission isn't getting proper torque values. I know mine feels a lot crisper without the JB4 installed.

Normally it sharpens throttle response and quickens shift times. I always have it in manual mode as well, you will notice regardless of what mode your in.

And don't tell me that... I just ordered a JB4

Are you telling me I'm going to want to return this thing? It's supposed to get here tomorrow. Now I'm going to be non stop worrying about my trans.

Nugget · 10-14-2013, 09:15 PM

I'm no expert and may be wrong, maybe ask Terry what he thinks. It probably won't be an issue until you start making big power anyway.
But in my experience it did slur the shifts a little compared to stock. Also made 30% more power than stock.

e36addict · 10-14-2013, 10:36 PM

I have no problems with my JB4/DCT. I have bms intake, charge pipe and downpipe, run 30/70 e85/93 and the worst issue I've experienced was slight slippage under heavy load in 4th around 50mph. Other than that it performs flawlessly. The sport button also makes quite a difference on how quick it shifts.. I don't get the sharper throttle since my DTC is always activated..

alexmtl_135i · 10-15-2013, 10:53 AM

Sport button still has the same effect once JB4 is installed: it sharpens the throttle response and quickens the gear shifts.

NJ1 · 10-15-2013, 03:18 PM

Thanks guys for the input. Can't wait to install tomorrow!

tapout2taxes · 10-15-2013, 07:13 PM

Quote:

Originally Posted by NJ1

Thanks guys for the input. Can't wait to install tomorrow!

Honestly I don't really like my car with the JB4 it certainly feels faster but there is a huge lag and some hesitation issues that I notice when I am using one of the maps. I drove last week in map 0 and I'm convinced the JB4 is the culprit. The gauge hijack is awesome but I'm considering selling the jb4. I'm also in LA and DCT.

BLU135i · 10-15-2013, 07:55 PM

There is still a very noticeable difference with the sport button engaged with JB4. I have stage 2 and I will admit that there is some noticeable lag with the sport button off. Push the button and it all changes. I love how car behaves with the JB4. Goes from mild mannered to wild ride with push of a button. I will say that I have had it on map 5 the entire time I have had it installed.

BEAR-AvHistory · 10-15-2013, 08:48 PM

The sport button maintains all its functions.

cwVW · 10-16-2013, 11:01 AM

The sport button gives the car an intoxicating exhaust note with my iCarbon DP and DCT. I can't help but accelerate whenever there is some open road so I can pull a few shifts with the paddles. The exhaust "burp" at each shift is much more noticeable. I run Map 5 at ~15 PSI.

Nugget · 10-16-2013, 10:06 PM

I must be weird because I can't notice any difference with the Sport Button pressed.

alexmtl_135i · 10-17-2013, 11:49 AM

Quote:

Originally Posted by Nugget

I must be weird because I can't notice any difference with the Sport Button pressed.

Honestly it took me a while to really notice something. Once you're used to it you can feel a difference but it's not huge.

CAVU · 10-17-2013, 08:52 PM

Quote:

Originally Posted by Nugget

I must be weird because I can't notice any difference with the Sport Button pressed.

Quote:

Originally Posted by alexmtl_135i

Honestly it took me a while to really notice something. Once you're used to it you can feel a difference but it's not huge.

Strange. In my car the difference is obvious. It essentially wakes the car up. There is a change in sound, throttle response, shift points, etc. I'm wondering if there are hardware or software differences that cause the Sport button to have a more pronounced effect on the 135is.

NJ1 · 10-17-2013, 09:33 PM

Quote:

Originally Posted by rikMsport

Strange. In my car the difference is obvious. It essentially wakes the car up. There is a change in sound, throttle response, shift points, etc. I'm wondering if there are hardware or software differences that cause the Sport button to have a more pronounced effect on the 135is.

No, it is quite pronounced and obvious in the 135i as well. At least with the stock software I have. Love the exhaust with the sport button engaged. When it's off you can get the car to make nice farts on up shifts but when it's engaged you can really get the car to bark loud on up shifts!

10-14-2013, 08:50 PM	#1
NJ1 Enlisted Member 9 Rep 37 Posts Drives: 2011 135i Join Date: Apr 2011 Location: United States iTrader: (0)	JB4 N55 DCT sport button Ok, so I know there is a million and one threads about the JB4. But I couldn't seem to find the answer to what I was looking for. Does the sport button become useless once the JB4 is installed? Would it only function when you are running the stock map?
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10-14-2013, 09:03 PM	#2
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	What does it do normally? I can't notice a difference but I always have it in manual mode. Also I don't think piggybacks are good for the DCT long term as the transmission isn't getting proper torque values. I know mine feels a lot crisper without the JB4 installed.
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10-14-2013, 09:15 PM	#4
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	I'm no expert and may be wrong, maybe ask Terry what he thinks. It probably won't be an issue until you start making big power anyway. But in my experience it did slur the shifts a little compared to stock. Also made 30% more power than stock.
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10-14-2013, 10:36 PM	#5
e36addict Captain 137 Rep 952 Posts Drives: 2013 X1 35iX Join Date: Jul 2013 Location: Tim @ BMW of Dallas iTrader: (5)	I have no problems with my JB4/DCT. I have bms intake, charge pipe and downpipe, run 30/70 e85/93 and the worst issue I've experienced was slight slippage under heavy load in 4th around 50mph. Other than that it performs flawlessly. The sport button also makes quite a difference on how quick it shifts.. I don't get the sharper throttle since my DTC is always activated.. __________________ 13 X1 35iX, 98 Z3 2.8, 01 M Coupe, 96 Z3 1.9 DASC, 95 318ti, 13 smart fortwo
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10-15-2013, 10:53 AM	#6
alexmtl_135i First Lieutenant 31 Rep 371 Posts Drives: 2013 C63 Coupe P31 Join Date: Oct 2011 Location: Montreal, Canada iTrader: (0)	Sport button still has the same effect once JB4 is installed: it sharpens the throttle response and quickens the gear shifts.
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10-15-2013, 03:18 PM	#7
NJ1 Enlisted Member 9 Rep 37 Posts Drives: 2011 135i Join Date: Apr 2011 Location: United States iTrader: (0)	Thanks guys for the input. Can't wait to install tomorrow!
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10-15-2013, 07:55 PM	#9
BLU135i Senior Chief Petty Officer USN 106 Rep 501 Posts Drives: X5 35d Join Date: Jan 2010 Location: Haze Grey iTrader: (1)	There is still a very noticeable difference with the sport button engaged with JB4. I have stage 2 and I will admit that there is some noticeable lag with the sport button off. Push the button and it all changes. I love how car behaves with the JB4. Goes from mild mannered to wild ride with push of a button. I will say that I have had it on map 5 the entire time I have had it installed.
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10-15-2013, 08:48 PM	#10
BEAR-AvHistory 2020 Z4 M40i - 2022 M4C Convt 3127 Rep 5,264 Posts Drives: 2020 Z4 M40i - 2022 M4C Convrt Join Date: Jun 2011 Location: Raleigh, NC - OIB, NC iTrader: (0) Garage List 1965 COBRA (FFR rep ... [8.57] 2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00]	The sport button maintains all its functions. __________________ Kevin Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT
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10-16-2013, 11:01 AM	#11
cwVW New Member 1 Rep 24 Posts Drives: 2011 135i DCT Join Date: Apr 2012 Location: Galloway, OH iTrader: (2)	The sport button gives the car an intoxicating exhaust note with my iCarbon DP and DCT. I can't help but accelerate whenever there is some open road so I can pull a few shifts with the paddles. The exhaust "burp" at each shift is much more noticeable. I run Map 5 at ~15 PSI. __________________ VSRF 5" IC, N55 JB4 G5 stage 2, iCarbon dp, Bilstein B12 kit, Ground Control camber plates, 17x8.5 TR Motorsport et40 wheels, 245/40R17 square, (-3 front camber, -1.9 rear fenders rolled),Mfactory 2.56 helical LSD, Whiteline KDT918, KDT919 poly inserts / bushings
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10-16-2013, 10:06 PM	#12
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	I must be weird because I can't notice any difference with the Sport Button pressed.
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