Shifting sluggish w\AC on...

Damage Inc · 06-26-2006, 06:06 PM

Hi all

I know the engine takes a little hit when the AC is on, but the shifting gets a little clunky (manual) more than normal. I'm just checking to see if this is normal for everybody or if I should have my car checked out...

David328M-Sport · 06-26-2006, 06:23 PM

My E90 does not take any percievable hit with the AC on. This is the first BMW that I have owned (e36 & e46) that works in this way. The e36 & 46 were hit hard with the AC on.

The E90 is wonderful that way - and in so very many other ways as well.

Moderato · 06-26-2006, 08:52 PM

When the AC is on there is more drag on the engine and as a result the rpms will drop a bit faster in between shifts. This means when the ac is on, you need to let the clutch out a bit faster then you are used to and that will smooth out the shifts.

Artz 330 · 06-26-2006, 08:59 PM

Quote:

Originally Posted by Moderato

When the AC is on there is more drag on the engine and as a result the rpms will drop a bit faster in between shifts. This means when the ac is on, you need to let the clutch out a bit faster then you are used to and that will smooth out the shifts.

absolutely right.

jojogargoles · 06-27-2006, 12:08 AM

well i never had a problem in shifting with AC on. Or maybe im used to it.

golfpro · 06-27-2006, 12:10 AM

i just noticed that, when the AC is on the rpms drop faster than dresses on prom night

David328M-Sport · 06-27-2006, 08:52 AM

no shift issues with the steptronic and ac on. only idle revs sit at about 600-650 instead of 550 with ac off.

Mr. BMW · 06-27-2006, 09:28 AM

Quote:

Originally Posted by MojorisinM3

Hi all

I know the engine takes a little hit when the AC is on, but the shifting gets a little clunky (manual) more than normal. I'm just checking to see if this is normal for everybody or if I should have my car checked out...

I've notice this too.

espo · 06-27-2006, 10:16 AM

Quote:

Originally Posted by golfpro

i just noticed that, when the AC is on the rpms drop faster than dresses on prom night

Definately true... I need to think alittle about this when I get in the car in the afternoon when it's alittle hot and the AC kicks on just to change my foot-work slightly. An ever so slight pressure on the gas pedal while the clutch is in will make the RPM's drop at a slower rate to complete the shift smoothly. Just need to remember that, so it usually takes the intial 1-2 jerky shift to kick the brain in gear.

Moderato · 06-27-2006, 04:55 PM

Quote:

Originally Posted by David325Australia

no shift issues with the steptronic and ac on. only idle revs sit at about 600-650 instead of 550 with ac off.

My grandmother doesn't have any shift issues with steptronic either.

bavarian19 · 06-27-2006, 04:56 PM

When I have my stereo on real loud, my laptop plugged in, A/C on full blast, my car also seems alittle sluggish...

I wonder why...

mikepinkerton · 07-01-2006, 01:26 PM

I went to the wrong high school...

-Mike

06-26-2006, 06:06 PM	#1
Damage Inc Lieutenant Colonel 790 Rep 1,926 Posts Drives: 2017 M2 Join Date: Apr 2005 Location: Nashville iTrader: (1)	Shifting sluggish w\AC on... Hi all I know the engine takes a little hit when the AC is on, but the shifting gets a little clunky (manual) more than normal. I'm just checking to see if this is normal for everybody or if I should have my car checked out...
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06-26-2006, 06:23 PM	#2
David328M-Sport Brigadier General 101 Rep 3,566 Posts Drives: F30 M-Sport 328i Estoril Blue Join Date: Jun 2005 Location: Melbourne Australia iTrader: (0)	My E90 does not take any percievable hit with the AC on. This is the first BMW that I have owned (e36 & e46) that works in this way. The e36 & 46 were hit hard with the AC on. The E90 is wonderful that way - and in so very many other ways as well. __________________ 328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
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06-26-2006, 08:52 PM	#3
Moderato First Lieutenant 9 Rep 327 Posts Drives: 07 E92 335 Join Date: Feb 2006 Location: USA iTrader: (0)	When the AC is on there is more drag on the engine and as a result the rpms will drop a bit faster in between shifts. This means when the ac is on, you need to let the clutch out a bit faster then you are used to and that will smooth out the shifts. __________________ 07 E92 335i Saph/Black 6MT 06 E46 M3 CB/Cinn ZCP 6MT - Sold 04 E46 330i Saph/NatBrn ZSP 6MT - Sold
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06-27-2006, 12:08 AM	#5
jojogargoles Lieutenant 9 Rep 549 Posts Drives: 330i Join Date: Jun 2006 Location: sherman oaks, CA iTrader: (2)	well i never had a problem in shifting with AC on. Or maybe im used to it. __________________ SpeedTool
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06-27-2006, 12:10 AM	#6
golfpro Second Lieutenant 24 Rep 208 Posts Drives: 2006 BMW 325i Join Date: Apr 2006 Location: Central New York iTrader: (1)	i just noticed that, when the AC is on the rpms drop faster than dresses on prom night
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06-27-2006, 08:52 AM	#7
David328M-Sport Brigadier General 101 Rep 3,566 Posts Drives: F30 M-Sport 328i Estoril Blue Join Date: Jun 2005 Location: Melbourne Australia iTrader: (0)	no shift issues with the steptronic and ac on. only idle revs sit at about 600-650 instead of 550 with ac off. __________________ 328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
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06-27-2006, 04:56 PM	#11
bavarian19 General 517 Rep 18,858 Posts Drives: Car Join Date: Mar 2005 Location: VA iTrader: (23)	When I have my stereo on real loud, my laptop plugged in, A/C on full blast, my car also seems alittle sluggish... I wonder why...
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07-01-2006, 01:26 PM	#12
mikepinkerton Private First Class 6 Rep 196 Posts Drives: '06 330i Join Date: Jun 2005 Location: Northern VA iTrader: (0)	I went to the wrong high school... -Mike
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