W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Open Headers?

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Old Oct 16, 2011 | 06:38 AM
  #1  
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2005 E55 AMG
Open Headers?

Is it possible to safely run an E55 with open headers as a DD?
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Old Oct 16, 2011 | 06:46 AM
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Why?

Last edited by _AMG_; Oct 16, 2011 at 07:17 AM.
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Old Oct 16, 2011 | 08:10 AM
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Originally Posted by _AMG_
Why?
Because it sounds amazing.

But from what I could find the backdraft of cold air can do some damage.

So I want to know if there is any way I can run open headers safely...
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Old Oct 16, 2011 | 09:55 AM
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Off the stock manifolds or actual longtubes? I run open headers off longtubes sometimes and it has been shweet thus far
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Old Oct 16, 2011 | 10:30 AM
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Open headers as a DD would be so insanely loud, it's not even funny. I don't even see how someone could drive it on a daily basis like this.
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Old Oct 16, 2011 | 11:05 AM
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When I had my LT headers installed they started the car up with open headers and I thought I was at a NASCAR race. - It was sick.
But it would get old real fast as a DD.
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Old Oct 16, 2011 | 11:54 AM
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Originally Posted by chawkins2001
Off the stock manifolds or actual longtubes? I run open headers off longtubes sometimes and it has been shweet thus far
I'm not sure which it was (I saw a video of an e55 with open headers) so I would guess it's from the stock manifold.

So, you can safely run open headers off longtubes for a DD without any damage to anything??


Also, what exactly are open headers?

Does it just mean that where the longtubes end the rest of the exhaust would continue it instead just ends there?
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Old Oct 16, 2011 | 01:15 PM
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Oh wow.
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Old Oct 16, 2011 | 01:39 PM
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I know for sure these cars are designed to have back pressure in the exhaust. Car would FOR SURE be down on power....how much is anybody's guess. Definitely down on trq too.

Not sure what zero back pressure would do to valves etc.

All I know is back pressure is a good thing on these forced induction cars.
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Old Oct 16, 2011 | 02:02 PM
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Anyone that has had exhaust work done to their car and has turned it on with just the headers connected knows how ungodly loud it is. If you think that cabin drone is bad and annoying, imagine this at all RPM's (including idle)

Not to mention the fact the loss in backpressure will lead to a loss in overall torque.

I'd also imagine that not having the rest of the exhaust piping connected could lead to overheating and cracking of the headers (you'd be reducing the amount of thermal conductivity by not having that added metallic surface area radiating out to the atmosphere). The smell would also be horrific since the exhaust gases would be coming out right next to your window. The sound wouldn't be refined--it'd be more like you were driving a tractor.

In short, while this may initially sound like a good idea and a good way to get "attention" and "look cool", the drawbacks are far too numerous.

Not to mention you wouldn't be able to hide having this setup from the cops. It's stupid.

Video clips from the net (watch the tools fall from the bench):
http://www.youtube.com/watch?v=Wh6XvypNNU0
http://www.youtube.com/watch?v=8ZY304bXP9Y

(In actuality, the videos don't even do it justice. It is *that* loud)
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Old Oct 16, 2011 | 02:04 PM
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Originally Posted by E55Bullet
Oh wow.
+1

Lol.
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Old Oct 16, 2011 | 03:19 PM
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Velocity people, velocity. No engine in the history of man kind needs backpressure.
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Old Oct 16, 2011 | 06:29 PM
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Yah I did this just last Friday after reflashing ECU for LT headers etc ... scared myself!! LOL .. open headers are LOUD!!! Waaay loud for an E55.

Originally Posted by dansamg
When I had my LT headers installed they started the car up with open headers and I thought I was at a NASCAR race. - It was sick.
But it would get old real fast as a DD.
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Old Oct 16, 2011 | 09:04 PM
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Well, I'll take that as a no and "you would get tired of the sound anyways".

Thanks for entertaining my less-knowledgeable queries, I guess I'll stick with

getting LTH for exhaust sound.
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Old Oct 16, 2011 | 09:09 PM
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Open headers... sound good? LOL, really?????
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Old Oct 16, 2011 | 10:33 PM
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Originally Posted by tbal
Open headers... sound good? LOL, really?????
Sure they do T, if you like old Novas!
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Old Oct 16, 2011 | 10:45 PM
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I would have to pass on the idea also if it were my daily.

BUT...

It is YOUR car...
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Old Oct 17, 2011 | 12:49 AM
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thats just dumb --- why dont you just take off the mufflers? that will give you alot of sound but not nearly as loud and ugly as straight headers.
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Old Oct 17, 2011 | 12:54 AM
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Originally Posted by GT-ER
Velocity people, velocity. No engine in the history of man kind needs backpressure.
^^^^^ +1
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Old Oct 17, 2011 | 04:20 AM
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1) Neighbors will hate you
2) In LA, cops will love you
3) Judge will give it to you (big fine in Cali for missing cats and open exhaust just invites scrutiny)
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Old Oct 17, 2011 | 03:42 PM
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Smells like a troll around here...
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Old Oct 17, 2011 | 10:17 PM
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sounds amazing. how about a flapper mod? something like this http://www.youtube.com/watch?v=h7ivpE7INIs
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Old Oct 17, 2011 | 10:42 PM
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Cutouts... http://youtu.be/NLPQTeT8SGU
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Old Oct 22, 2011 | 06:08 PM
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Originally Posted by tbal

Thanks, I think I'll look into cutouts.
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Old Oct 22, 2011 | 07:48 PM
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At the track last night...even though my times were weak...people were coming out of the woodwork to talk to us because of how the car sounded with the cutouts open. The drag bike dudes were the funniest. Sitting there on their 8 second bikes gawking at my car...one guy literally said, "on a cool factor of 1 to 10, I give it a 15".

Long tubes with cut outs is the ticket.

Uploading vids tonight so you'll be able to hear it.

There is no way in hell I could possibly ever drive it with it open as a dd.
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