SAT vs. Regular AT, N20 vs. N26, Stock 4GC vs. Tuned 328

bahasad · 06-01-2015, 10:16 PM

My car is in for a service and checking a restraint MIL. They gave me a poverty-spec 428XI GC with the SAT. The throttle response feels much more direct than mine, and as a result the car feels quick. OTOH, my car feels like there's really no response from the first 25% of throttle travel and even then responses seem delayed (in comfort). I ran the loaner car on 89 OCT as well.
Any thoughts?

My car:
2014 328XI (11/13 production) Sportline
Non-SAT
BMS Stage 1 Tuned, AA Exhaust, Injen CAI, ER CP
N26 SULEV, 93 OCTANE 100% of the time.

Loaner:
2015 428XI GC Base
SAT
N20

Could it be the SAT improves throttle response? Newer Calibration/throttle mapping?

KGB_123_99 · 06-01-2015, 10:21 PM

I coded SAT on my car some time ago and it does make a big difference. Even in comfort mode I find the drivetrain to be more responsive.

After the engine, the second thing that makes the car is the transmission.

bahasad · 06-01-2015, 10:43 PM

Quote:

Originally Posted by KGB_123_99

I coded SAT on my car some time ago and it does make a big difference. Even in comfort mode I find the drivetrain to be more responsive.

After the engine, the second thing that makes the car is the transmission.

Highly agree, I am getting it coded ASAP. Just seems so much more responsive.

I am wondering if the SAT affects throttle mapping too - I kept the car in 3rd to 5th gears and did a couple of pulls and the car seemed to pull strongly and linearly.

bahasad · 06-02-2015, 07:02 AM

So I got my car back, my car accelerates quicker/harder than the 428 loaner, but there's still a bit of an non-linear response - perhaps due to the SAT, perhaps due to the mods increasing boost threshold.

I have to say the 428 shape looks good. With the m-sport kit and lower suspension/wheels, it may just be my next replacement. It would be cool if BMW ever made an M4 GC.

KGB_123_99 · 06-02-2015, 09:06 AM

I would like an M2 GC. I would be all over that in a heartbeat.

sr5959 · 06-02-2015, 11:42 AM

M4 GC would look amazing I think!

CalCarNut · 06-02-2015, 11:46 AM

^+1. Love the GC lines. Wonder how they'd go about naming it since there is an M4...or would they just move the name over? Hmm....

otay · 06-03-2015, 11:41 AM

Well, I've also experienced non-linearity in throttle position in Comfort mode. I've got a 2014 with the SAT.
http://f30.bimmerpost.com/forums/sho....php?t=1132695

Guess I need to schedule service...it's annoying. In my case, they replaced the tranny mechatronix a couple months ago due to weird delays when up-shifting. After that work, the decel/delay between gears is gone, but still have the throttle delay when pulling away from a stop (but only in Comfort). Seems like very little throttle is applied for first little bit of pedal travel.

Thus the continued love / hate relationship with this Bimmer.

06-01-2015, 10:16 PM	#1
bahasad Major 327 Rep 1,490 Posts Drives: F30, E90 Join Date: Jul 2013 Location: Somewhereinamerica iTrader: (4)	SAT vs. Regular AT, N20 vs. N26, Stock 4GC vs. Tuned 328 My car is in for a service and checking a restraint MIL. They gave me a poverty-spec 428XI GC with the SAT. The throttle response feels much more direct than mine, and as a result the car feels quick. OTOH, my car feels like there's really no response from the first 25% of throttle travel and even then responses seem delayed (in comfort). I ran the loaner car on 89 OCT as well. Any thoughts? My car: 2014 328XI (11/13 production) Sportline Non-SAT BMS Stage 1 Tuned, AA Exhaust, Injen CAI, ER CP N26 SULEV, 93 OCTANE 100% of the time. Loaner: 2015 428XI GC Base SAT N20 Could it be the SAT improves throttle response? Newer Calibration/throttle mapping? __________________ Current: 17 Mustang GT no bmw Gone but not forgotten: 07 E90 335I, 04 UA6, 95 E36, 04 EP3, 16 S550 EB, 14 F30 328I Stg 1, 08 E90 328I
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06-01-2015, 10:21 PM	#2
KGB_123_99 Captain 404 Rep 962 Posts Drives: '17 330ix M-Sport, '09 528ix Join Date: Apr 2014 Location: Montreal, QC iTrader: (0)	I coded SAT on my car some time ago and it does make a big difference. Even in comfort mode I find the drivetrain to be more responsive. After the engine, the second thing that makes the car is the transmission.
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06-02-2015, 07:02 AM	#4
bahasad Major 327 Rep 1,490 Posts Drives: F30, E90 Join Date: Jul 2013 Location: Somewhereinamerica iTrader: (4)	So I got my car back, my car accelerates quicker/harder than the 428 loaner, but there's still a bit of an non-linear response - perhaps due to the SAT, perhaps due to the mods increasing boost threshold. I have to say the 428 shape looks good. With the m-sport kit and lower suspension/wheels, it may just be my next replacement. It would be cool if BMW ever made an M4 GC. __________________ Current: 17 Mustang GT no bmw Gone but not forgotten: 07 E90 335I, 04 UA6, 95 E36, 04 EP3, 16 S550 EB, 14 F30 328I Stg 1, 08 E90 328I
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06-02-2015, 09:06 AM	#5
KGB_123_99 Captain 404 Rep 962 Posts Drives: '17 330ix M-Sport, '09 528ix Join Date: Apr 2014 Location: Montreal, QC iTrader: (0)	I would like an M2 GC. I would be all over that in a heartbeat.
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06-02-2015, 11:42 AM	#6
sr5959 Captain 138 Rep 690 Posts Drives: 428GC M-Sport Join Date: Apr 2012 Location: Seattle iTrader: (0)	M4 GC would look amazing I think!
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06-02-2015, 11:46 AM	#7
CalCarNut Brigadier General 1061 Rep 3,258 Posts Drives: 2015 F36 Jet Black Sport Line Join Date: Apr 2015 Location: Blue Skies iTrader: (0) Garage List 2012 BMW X3 [0.00] 2015 BMW 428i Gran ... [10.00] 1996 Chevrolet Impa ... [8.00]	^+1. Love the GC lines. Wonder how they'd go about naming it since there is an M4...or would they just move the name over? Hmm.... __________________ 2015 BMW F36 428i JetBlack. Sport Line Edition 25% 3M Tint\|
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06-03-2015, 11:41 AM	#8
otay Major 826 Rep 1,342 Posts Drives: 2015 335i Join Date: Aug 2014 Location: Raleigh, NC iTrader: (0)	Well, I've also experienced non-linearity in throttle position in Comfort mode. I've got a 2014 with the SAT. http://f30.bimmerpost.com/forums/sho....php?t=1132695 Guess I need to schedule service...it's annoying. In my case, they replaced the tranny mechatronix a couple months ago due to weird delays when up-shifting. After that work, the decel/delay between gears is gone, but still have the throttle delay when pulling away from a stop (but only in Comfort). Seems like very little throttle is applied for first little bit of pedal travel. Thus the continued love / hate relationship with this Bimmer.
	Appreciate 0 Quote