cold start - Page 2

THE TECH · 11-29-2011, 04:05 PM

I'm leaving it in on mine. Love that sound!

Mike Benvo · 12-03-2011, 12:36 AM

Quote:

Originally Posted by THE TECH

I'm leaving it in on mine. Love that sound!

+1

I had it off for awhile.. Definitely makes the cold starts much more smooth..

The pump is there simply to warm the cats for emissions reasons, because the precious metals inside do not catalyze the exhaust gases (reducing emissions) until the cats reach operating temperature.

I guess leaving it on makes up for my de-catted turbo 7 series

Ateam · 12-03-2011, 03:11 AM

Does the "cold start" only happen if the temperatures is under a certain temp? I do not really notice my car has ever been loud on startup but I am basically stock. However I live in warm weather and coldest my car has seen is probably 50 degrees.

Mike Benvo · 12-03-2011, 03:47 AM

Quote:

Originally Posted by Ateam

Does the "cold start" only happen if the temperatures is under a certain temp? I do not really notice my car has ever been loud on startup but I am basically stock. However I live in warm weather and coldest my car has seen is probably 50 degrees.

No, it will turn on even if it's 100 degrees out. You won't notice it too much with the stock exhaust, but modified it's a huge difference.

1MOREMOD · 12-17-2011, 03:11 PM

mine with the challenge sport xpipe seems pretty tame to me now that i dont have the added buzz created by the crossmember touching. simple fix with a few washers.

Ateam · 12-17-2011, 03:28 PM

Ok I heard what you guys mean after my exhaust was modded. It is hella loud from outside but if you are in the car it is not really all that loud. Standing outside the car though it sounds terrifying! I do not see a reason to get rid of it. Why? Might as well have the cats work as well as possible if you are going to keep them anyway.

lve2xlr8 · 12-17-2011, 03:33 PM

I would have kept mine, but I work in production and the car was so bassy with my akra evo that it would ruin shots and I would have to wait for a cut to start up and drive away.

roddyc · 01-10-2012, 10:20 AM

I'm sure this has been asked before, but I couldn't find it searching. Is there any way to remove the cold start without getting a tune? If reduced emissions are really the only benefit from having it in place, I'm willing to kill the planet a little every time I start my car.

mpbruin108 · 01-10-2012, 10:30 AM

Mine is always in a garage and luckily i don't have neighbors that close to hear my startup but when I had the cold start...that garage would be a shakin'! It did sound so good and exotic however, I started scaring old folks at a nearby mall when i started my car to leave to go home. So not wanting to contribute to anyone's heart attack, I took out the cold start and the car is so much nicer...and tamer...but when you want to show it off, it does the trick. It's like a dual personality exhaust. I like it

GIdriver · 01-10-2012, 11:11 AM

Quote:

Originally Posted by Paul@Evolve

Exactly as singletrack says and as we talked about on the phone Chris, primarily there to heat up the cats for emissions reasons. If you like a loud startup leave it in, if you'd prefer a quiter exit from home, we can remove it

So no long term effects or damage to the car by removing the cold start?

Mike Benvo · 01-11-2012, 09:45 PM

Quote:

Originally Posted by GIdriver

So no long term effects or damage to the car by removing the cold start?

No, it's fine to remove it.

If you have cats it might be a little harsh on them and cold emissions will be higher, but as far as hurting the car it's all good.

roddyc · 01-12-2012, 10:00 AM

Quote:

Originally Posted by Mike Benvo

No, it's fine to remove it.

If you have cats it might be a little harsh on them and cold emissions will be higher, but as far as hurting the car it's all good.

So as someone who has experience coding and programming, the only way you know of to remove the cold start is a tune? TIA!

GIdriver · 01-12-2012, 10:01 AM

Quote:

Originally Posted by Mike Benvo

No, it's fine to remove it.

If you have cats it might be a little harsh on them and cold emissions will be higher, but as far as hurting the car it's all good.

Thanks!

Mike Benvo · 01-12-2012, 03:22 PM

Quote:

Originally Posted by roddyc

So as someone who has experience coding and programming, the only way you know of to remove the cold start is a tune? TIA!

It's the proper way to remove it. Other than that, you could disconnect the secondary air pump as well, but this would certainly trigger fault codes as there is a little airflow sensor in the secondary air system.

11-29-2011, 04:05 PM	#23
THE TECH BimmerPost Supporting Vendor Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas Posts: 11,925 iTrader: (39)	I'm leaving it in on mine. Love that sound! __________________ Check us out on Facebook at BPMsportLabs

12-17-2011, 03:11 PM	#27
1MOREMOD Major General Drives: at a moderate pace Join Date: Mar 2009 Location: garage Posts: 6,528 iTrader: (3)	mine with the challenge sport xpipe seems pretty tame to me now that i dont have the added buzz created by the crossmember touching. simple fix with a few washers. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC race control arms\|GC bushings & bearings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster knob\|Euro header\|Eisenmann sport\|K&N c.a.i.\|Seibon CF hood\|CSL bumper\|CSL brakes\|RS19s\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|race pulleys\|BMWpedals\|Apex studs\|1995 Ford Probe gt chump car\|

12-17-2011, 03:33 PM	#29
lve2xlr8 Captain Drives: '11 e92 M3 MW ZCP DCT Join Date: Aug 2008 Location: OC Posts: 704 iTrader: (5)	I would have kept mine, but I work in production and the car was so bassy with my akra evo that it would ruin shots and I would have to wait for a cut to start up and drive away. __________________ '11 M3 '00 M5 - Sold '08 335i w/m3 conversion - Sold

01-10-2012, 10:30 AM	#31
mpbruin108 Mpbruin108 Drives: I'm a hypermiler Join Date: Jul 2011 Location: los angeles Posts: 428 iTrader: (5)	Mine is always in a garage and luckily i don't have neighbors that close to hear my startup but when I had the cold start...that garage would be a shakin'! It did sound so good and exotic however, I started scaring old folks at a nearby mall when i started my car to leave to go home. So not wanting to contribute to anyone's heart attack, I took out the cold start and the car is so much nicer...and tamer...but when you want to show it off, it does the trick. It's like a dual personality exhaust. I like it __________________ 2009 Z4 Sdrive35i, 2011 Land Rover Autobiography, 2010 RR Phantom, 2012 S550 2010 AW E92 M3 (SOLD)

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12-03-2011, 03:11 AM	#25
Ateam Banned Drives: M3 Join Date: Sep 2011 Location: USA Posts: 1,111 iTrader: (0)	Does the "cold start" only happen if the temperatures is under a certain temp? I do not really notice my car has ever been loud on startup but I am basically stock. However I live in warm weather and coldest my car has seen is probably 50 degrees.

12-17-2011, 03:28 PM	#28
Ateam Banned Drives: M3 Join Date: Sep 2011 Location: USA Posts: 1,111 iTrader: (0)	Ok I heard what you guys mean after my exhaust was modded. It is hella loud from outside but if you are in the car it is not really all that loud. Standing outside the car though it sounds terrifying! I do not see a reason to get rid of it. Why? Might as well have the cats work as well as possible if you are going to keep them anyway.

01-10-2012, 10:20 AM	#30
roddyc Private First Class Drives: 08 E90 M3 Join Date: Jul 2011 Location: Frisco, TX Posts: 196 iTrader: (4)	I'm sure this has been asked before, but I couldn't find it searching. Is there any way to remove the cold start without getting a tune? If reduced emissions are really the only benefit from having it in place, I'm willing to kill the planet a little every time I start my car.