Driving with the air conditioning on

TheSt|G · 07-07-2014, 07:22 AM

Quote:

Originally Posted by 2tonik

Too busy driving the 911?

If you want to appreciate the AC in the 1er, just drive an older 911.

kafou · 07-07-2014, 04:03 PM

So for the best experience with a stock 128i, disable the A/C and disable the traction control is the way to go? just one touch on the traction control or the 3 sec hold?

I know for the best experience I have to do some mods but for now I'm unsure if I want to mess with my remaining 2 year of warranty...

Obioban · 07-08-2014, 12:51 PM

Quote:

Originally Posted by Chrisar82

You don't turn it off in in the winter? For what reason?

I don't like my windows fogging up and don't want to have to replace the compressor (failure comes from extended periods of disuse).

MarkkyyMan · 07-08-2014, 01:19 PM

My buddy has an e46 m3 and he drove my car this last holiday weekend. He was even surprised at how fast the rpms dropped.

Obioban · 07-08-2014, 02:38 PM

Quote:

Originally Posted by MarkkyyMan

My buddy has an e46 m3 and he drove my car this last holiday weekend. He was even surprised at how fast the rpms dropped.

The N52's revs do drop faster-- lighter internals, lighter flywheel, less rotational inertia to keep it spinning.

chris82 · 07-09-2014, 08:38 AM

Quote:

Originally Posted by Obioban

The N52's revs do drop faster-- lighter internals, lighter flywheel, less rotational inertia to keep it spinning.

That's good to know. This is all starting to make sense

JM35 · 07-09-2014, 10:36 AM

Can anyone verify the truth that you lose 10+ HP when the AC is on? Do you lose more the higher you have it cranked?

TheSt|G · 07-09-2014, 12:03 PM

Quote:

Originally Posted by JM35

Can anyone verify the truth that you lose 10+ HP when the AC is on? Do you lose more the higher you have it cranked?

It certainly causes drag on the engine, but you will be hard pressed to notice the difference. When WOT, the AC is disabled, so peak HP is available regardless if the AC is switched on or not.

Suprgnat · 07-09-2014, 12:33 PM

I can't say I've ever shifted so lethargically that the RPMs have dropped below where the next gear would want them to be.

Wakka · 07-09-2014, 12:41 PM

Quote:

Originally Posted by Suprgnat

I can't say I've ever shifted so lethargically that the RPMs have dropped below where the next gear would want them to be.

Drive around with it off for 5-10 mins shifting normally, then turn the ac on and drive for 5-10 mins. You will mess up at least 1 shift in that amount of time, or your car is the only manual 128i in this thread that doesnt have the problem.

Suprgnat · 07-09-2014, 12:45 PM

Quote:

Originally Posted by Wakka

Drive around with it off for 5-10 mins shifting normally, then turn the ac on and drive for 5-10 mins. You will mess up at least 1 shift in that amount of time, or your car is the only manual 128i in this thread that doesnt have the problem.

Did that when this thread was started. There is a difference, but I don't find it so drastic that I "mess up".

TheSt|G · 07-09-2014, 01:13 PM

Quote:

Originally Posted by Suprgnat

Did that when this thread was started. There is a difference, but I don't find it so drastic that I "mess up".

Indeed, just a matter of feathering the clutch for an extra quarter/half second.

chris82 · 07-09-2014, 05:54 PM

Quote:

Originally Posted by TheSt|G

Indeed, just a matter of feathering the clutch for an extra quarter/half second.

That is exactly what I have found out too

JM35 · 07-10-2014, 12:04 PM

Quote:

Originally Posted by TheSt|G

It certainly causes drag on the engine, but you will be hard pressed to notice the difference. When WOT, the AC is disabled, so peak HP is available regardless if the AC is switched on or not.

Gotcha, thanks for clearing that up. My buddy always tells me that but my butt dyno has never noticed a true difference especially at WOT.

RoundelM3 · 07-11-2014, 07:27 AM

No problems shifting with or without A/C running; after 40+ years of driving manual trans, it's second-nature. Don't overthink it.

BaNaNaBoy69 · 07-12-2014, 03:04 AM

I drive an auto 128i and I do notice the loss in power when I have the A/C turned on.

07-07-2014, 04:03 PM	#46
kafou Enlisted Member 4 Rep 45 Posts Drives: BMW 128i 2012 Join Date: Oct 2013 Location: Canada iTrader: (0)	So for the best experience with a stock 128i, disable the A/C and disable the traction control is the way to go? just one touch on the traction control or the 3 sec hold? I know for the best experience I have to do some mods but for now I'm unsure if I want to mess with my remaining 2 year of warranty...
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07-08-2014, 01:19 PM	#48
MarkkyyMan Captain 38 Rep 701 Posts Drives: 2010 BMW 128i Join Date: Dec 2009 Location: Indiana, U.S. iTrader: (0)	My buddy has an e46 m3 and he drove my car this last holiday weekend. He was even surprised at how fast the rpms dropped.
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07-09-2014, 10:36 AM	#51
JM35 N54 Tuner 7 Rep 160 Posts Drives: 2008 135i 6spd Join Date: Sep 2013 Location: Houston iTrader: (0)	Can anyone verify the truth that you lose 10+ HP when the AC is on? Do you lose more the higher you have it cranked? __________________ 2008 135i - 6MT - Jet Black 600hp 135i build blog
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07-09-2014, 12:33 PM	#53
Suprgnat Слава Украине! 2317 Rep 2,440 Posts Drives: 2013 128i LMB 6MT ZMP Slicktop Join Date: Jan 2013 Location: California iTrader: (7) Garage List 2013 128i [9.58]	I can't say I've ever shifted so lethargically that the RPMs have dropped below where the next gear would want them to be.
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07-11-2014, 07:27 AM	#59
RoundelM3 Major General 1835 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	No problems shifting with or without A/C running; after 40+ years of driving manual trans, it's second-nature. Don't overthink it. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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07-12-2014, 03:04 AM	#60
BaNaNaBoy69 ****** 10 Rep 207 Posts Drives: E88 Join Date: May 2009 Location: BC iTrader: (0) Garage List 2009 E88 128i Cabri ... [0.00]	I drive an auto 128i and I do notice the loss in power when I have the A/C turned on. __________________ 2005 BMW X3 30i [E83] Retired 2009 BMW X6 xDrive35i [E71] Retired 2009 BMW 128i Cabriolet [E88] Alpine White / Coral Red Boston Leather / Moonlight Black Softtop / High-Gloss Black Trim / 18" W Spoke Wheels / Navigation / Premium / Premium Sound / Sport / PDC
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