Questions re: AA Tune and COLD start elimiation

m3soupy · 11-10-2010, 08:00 PM

One feature of AA's tune mentions:
* Modified VANOS camshaft remapping eliminating rough COLD start enable

Is there a downside to eliminating the COLD start?
What is the purpose of the rough COLD start other than warm up?

I think I've heard that Dinan doesn't eliminate it.. Not sure about ESS or others.

mfeltiii · 11-10-2010, 09:00 PM

The downside would be that if you needed to pass inspections you would not only need to put your cats back on, but also get reflashed to stock.

m3soupy · 11-10-2010, 11:12 PM

Does that mean the COLD start eliminate is only available if you don't have cats?

mike33176 · 11-10-2010, 11:21 PM

Cold start Hi rpms are designed to warm up the stock cats. Start up with the AA tune is just like any other car starting up and reving at around 800RPM. Love it since it doesn't wake up my neighbors anymore

1MORELAP · 11-11-2010, 10:20 AM

The AA feature sounds really valuable. It should have ZERO impact on passing emissions. Who tries to pass with a COLD car???

Yjad27 · 11-11-2010, 12:57 PM

Just did the AA tune to mine yesterday. I love that feature. Specially when leaving to work in the morning and I start my car in the garage. My wife, kids and neighbors all give their thanks! If there's a downside, I haven't figured it out yet.

dvpouldar26 · 11-11-2010, 01:57 PM

Cats need to be brought up to operating temps to work. This is why there are cold starts, to warm up the cats to operating temps. This is also why there is an idle blower motor sometimes in cars, to warm up the cats faster to these working operating temps.

This feature sounds really cool for those going catless and for those with really loud exhausts so it doesnt disturb others on cold starts.

mike33176 · 11-11-2010, 05:41 PM

[QUOTE=Yjad27;8318208]Just did the AA tune to mine yesterday. I love that feature. Specially when leaving to work in the morning and I start my car in the garage. My wife, kids and neighbors all give their thanks! If there's a downside, I haven't figured it out yet

Did you go to active ? If so, Barry is the man!

Jean@ActiveAutowerke · 11-12-2010, 09:42 AM

Pretty much all that has been posted is correct, the faster the cats get up to operating temps the better it is for BMW which gives a stock car that awful cold start. It isn't an issue but as mentioned it is great to not have it especially in the morning.

Feel free to post any other questions in regards to the tune and I will be happy to answer them.

11-10-2010, 08:00 PM	#1
m3soupy Private First Class 15 Rep 129 Posts Drives: 2010 M3 E90 w/DCT Join Date: Sep 2009 Location: Bay Area iTrader: (0)	Questions re: AA Tune and COLD start elimiation One feature of AA's tune mentions: * Modified VANOS camshaft remapping eliminating rough COLD start enable Is there a downside to eliminating the COLD start? What is the purpose of the rough COLD start other than warm up? I think I've heard that Dinan doesn't eliminate it.. Not sure about ESS or others.
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11-10-2010, 09:00 PM	#2
mfeltiii Second Lieutenant 8 Rep 262 Posts Drives: '10 AW E92 6mt Join Date: Jan 2010 Location: S. FLA iTrader: (1)	The downside would be that if you needed to pass inspections you would not only need to put your cats back on, but also get reflashed to stock.
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11-10-2010, 11:12 PM	#3
m3soupy Private First Class 15 Rep 129 Posts Drives: 2010 M3 E90 w/DCT Join Date: Sep 2009 Location: Bay Area iTrader: (0)	Does that mean the COLD start eliminate is only available if you don't have cats?
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11-10-2010, 11:21 PM	#4
mike33176 Lieutenant 47 Rep 431 Posts Drives: 09 Jerez/ Black, E90 M3 Join Date: Nov 2009 Location: Miami iTrader: (1)	Cold start Hi rpms are designed to warm up the stock cats. Start up with the AA tune is just like any other car starting up and reving at around 800RPM. Love it since it doesn't wake up my neighbors anymore
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11-11-2010, 10:20 AM	#5
1MORELAP Captain 100 Rep 700 Posts Drives: '22 911 GTS '19 X3, X5, X7 Join Date: May 2010 Location: Seattle, WA iTrader: (0)	The AA feature sounds really valuable. It should have ZERO impact on passing emissions. Who tries to pass with a COLD car??? __________________ I apologize for spelling mistakes up front, they are a result of multitasking.
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11-11-2010, 12:57 PM	#6
Yjad27 New Member 6 Rep 23 Posts Drives: '09 BMW E90 6MT Jerez BLK Join Date: Jun 2009 Location: Miami, Fl iTrader: (0)	Just did the AA tune to mine yesterday. I love that feature. Specially when leaving to work in the morning and I start my car in the garage. My wife, kids and neighbors all give their thanks! If there's a downside, I haven't figured it out yet.
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11-11-2010, 01:57 PM	#7
dvpouldar26 Major 64 Rep 1,498 Posts Drives: 2008 e92 328i, Porsche 987.1 Join Date: May 2008 Location: Beverly Hills, CA iTrader: (4)	Cats need to be brought up to operating temps to work. This is why there are cold starts, to warm up the cats to operating temps. This is also why there is an idle blower motor sometimes in cars, to warm up the cats faster to these working operating temps. This feature sounds really cool for those going catless and for those with really loud exhausts so it doesnt disturb others on cold starts. __________________ E92 328i Jet Black / Gloss Black Grilles / 8000k D1S low beam / 6000k HID fogs / GP Thunder 8500k angels & cornering bulbs / black reflectors / gloss black vinyled window trim / tints / smoked rear turn signals / black roundels / AC Schnitzer roof spoiler / VRS style decklid spoiler / Matte black Stripes / Rear fogs / matte mirrors / 19" LM reps / APR lip
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11-11-2010, 05:41 PM	#8
mike33176 Lieutenant 47 Rep 431 Posts Drives: 09 Jerez/ Black, E90 M3 Join Date: Nov 2009 Location: Miami iTrader: (1)	[QUOTE=Yjad27;8318208]Just did the AA tune to mine yesterday. I love that feature. Specially when leaving to work in the morning and I start my car in the garage. My wife, kids and neighbors all give their thanks! If there's a downside, I haven't figured it out yet Did you go to active ? If so, Barry is the man!
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11-12-2010, 09:42 AM	#9
Jean@ActiveAutowerke Lieutenant 114 Rep 540 Posts Drives: 335 Join Date: Mar 2007 Location: Miami iTrader: (0)	Pretty much all that has been posted is correct, the faster the cats get up to operating temps the better it is for BMW which gives a stock car that awful cold start. It isn't an issue but as mentioned it is great to not have it especially in the morning. Feel free to post any other questions in regards to the tune and I will be happy to answer them.
	Appreciate 0 Quote