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      03-20-2017, 09:33 AM   #23
Alan l.
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Imagine what my X5M with the Eisenmann Race (no valves) sounds like on morning cold starts. lol

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      03-20-2017, 02:41 PM   #24
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Quote:
Originally Posted by Alan l. View Post
Imagine what my X5M with the Eisenmann Race (no valves) sounds like on morning cold starts. lol

Alan
Sounds very good if you hates your neighbors. Hahaha.
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      03-20-2017, 02:54 PM   #25
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^^ very true. You would know since you just had one there lol

Lucky the sound calms down within 15-20 secs and idles out to being pretty "normal" tone

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      03-20-2017, 02:54 PM   #26
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Quote:
Originally Posted by taile77 View Post
I love cars that look like it is not supposed to be fast but can burn unsuspecting victims. My X5 50i is not a family suv but my sports car. I personally wish it had the cold start sound all the time as well.
Same! Most of my friends who sit in my car for the first time are shocked at the cold start for an SUV...and I'm just in driver seat like
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      10-14-2017, 07:23 PM   #27
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Out of curiosity - any way to recreate that cold start mode on demand via coding? I know it won't have as much power as a normal map, but just for that fabulous sound imho it's worth to put it in that mode when you are cruising at low speeds around

P.S. So I'm still wondering what exactly causes that sound: open wastegates or 30 degree ignition timing adjustment?
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      10-15-2017, 02:47 AM   #28
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Originally Posted by Zucka View Post
I love the sound of my X5 in the morning, it is exciting!
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      01-03-2018, 09:32 PM   #29
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my 50i catless downpipes and resonators delete

[QUOTE=lowlevelhell;21400858]Interesting that they decided to forgo the flap modulators on the N63. Shouldn't take but 2 or 3 seconds for full oil pressure to reach the turbine bearings though.

A major portion of the sound difference is the "converter heating mode" in which the ECU purposely adjusts the engine timing to after TDC ad a means of throwing combustion heat downstream to rapidly heat the catalytic converter. That delayed ignition produces a much different noise, as it's accompanied by a second, latent injection to ensure ignition/combustion after peak cylinder pressure is reached.

I've seen nothing to corroborate the idea of the wastegates opening on a cold start, though it makes a degree of sense.[/QUOTE

Still apply if you have a custom exhaust with catless downpipes and resonators delete? need to idle thoose 30 seconds when cold anyway?
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      01-03-2018, 09:42 PM   #30
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[QUOTE=zombiemaniac;22606450]
Quote:
Originally Posted by lowlevelhell View Post
Interesting that they decided to forgo the flap modulators on the N63. Shouldn't take but 2 or 3 seconds for full oil pressure to reach the turbine bearings though.

A major portion of the sound difference is the "converter heating mode" in which the ECU purposely adjusts the engine timing to after TDC ad a means of throwing combustion heat downstream to rapidly heat the catalytic converter. That delayed ignition produces a much different noise, as it's accompanied by a second, latent injection to ensure ignition/combustion after peak cylinder pressure is reached.

I've seen nothing to corroborate the idea of the wastegates opening on a cold start, though it makes a degree of sense.[/QUOTE

Still apply if you have a custom exhaust with catless downpipes and resonators delete? need to idle thoose 30 seconds when cold anyway?
Nah, it can be coded out/deleted and even when not - all you need is to touch gas pedal once or put gear shifter into any gear and car will automatically stop that "cold start mode"
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      01-03-2018, 10:42 PM   #31
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yep

[QUOTE=DuSh;22606471]
Quote:
Originally Posted by zombiemaniac View Post

Nah, it can be coded out/deleted and even when not - all you need is to touch gas pedal once or put gear shifter into any gear and car will automatically stop that "cold start mode"
thats the same thing I do!!
put it and drive really quick then parking.
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      01-04-2018, 02:23 AM   #32
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"MAKE IT LOUDER!" says every 50i owner
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      01-04-2018, 03:12 AM   #33
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trust me I love my custom exhaust sound!

Quote:
Originally Posted by kanvas View Post
"MAKE IT LOUDER!" says every 50i owner
also my custom air filters set up
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      01-04-2018, 03:15 AM   #34
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resonators delete

delete
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      01-04-2018, 05:17 AM   #35
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Originally Posted by MysticBlue View Post
You should hear it on my M3. Full Dinan exhaust and cat delete... When I start it up in my garage, pictures on the walls and windows literally rattle in my house. I usually leave the garage door closed until it cycles through, as a favor to my neighbors.
My neighbors bitch but I don't care. They sound great!!!!
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      01-02-2019, 10:21 AM   #36
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BMW X5 Xdrive 2011 Cold Start engine noise

Can someone advise the cold start noise from x5 E70 Xdhttps://youtu.be/eyTPp0iRBX8rive 2011.

Appreciate your help
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      01-02-2019, 04:56 PM   #37
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It's loud because it can. And because it's awesome. Don't like it? Get a Lexus.
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      01-02-2019, 09:52 PM   #38
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Quote:
Originally Posted by asifmalik View Post
Can someone advise the cold start noise from x5 E70 Xdhttps://youtu.be/eyTPp0iRBX8rive 2011.

Appreciate your help
This is not the E70 forum. Sounds like a diesel or lifters.
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