Dynomite's Dual Exhaust Thread
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CLK350
Can a dual exhaust be done without switching spare tire wells? I've got a 350 and I want to do the same. I read something about removing the secondary cats and resonator and being able to place the second muffler in place of those?
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From: A Canadian in Dubai, United Arab Emirates
'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
M-bENZ did his true dual that way, he's got a thread up with pics. He didn't use a muffler in place of the 2nd cats and resonator though, just straight pipes off the primary cats.
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2006 CLK 350 Fog City, CA, USA
Say, doesn't a true dual exhaust increase air flow so the engine will run lean and lose torque?
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
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From: Jerzy
04 CLK 320 > CLK32K
If you don't change the wheel well you won't be able to fit 2 mufflers. You could do what Andy did and delete 2nd cats/resonator/muffler and run 2 glasspacks in the middle and straight pipes to the tips.
Thread Starter
Out Of Control!!
Joined: Apr 2008
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From: Jerzy
04 CLK 320 > CLK32K
Say, doesn't a true dual exhaust increase air flow so the engine will run lean and lose torque?
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
MBWorld Fanatic!
Joined: Jul 2010
Posts: 4,748
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From: A Canadian in Dubai, United Arab Emirates
'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
Say, doesn't a true dual exhaust increase air flow so the engine will run lean and lose torque?
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
I've read that by flashing the ECU it will enrich the air/fuel mixture to regain the loss torque but then emission problems might occur?
Anyway, here's the Weitmeier's quad exhaust sytem but is pricey at $1250 !!
http://www.performanceproducts4benz....l?dept_id=5959
Thread Starter
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From: Jerzy
04 CLK 320 > CLK32K
By just going from the factory exhaust to a true dual set up is not going to cause a lean condition. It will definately allow the engine to breathe easier and lean up the a/f ratios but only marginally. Some members here and on other forums have said that they feel like they lost bottom end when going to a free flowing exhaust but IIRC all of them negated those thoughts after the ECU adapted to the change.
Now that you mention it, my car did feel a bit sluggish on the drive home. It was about a 45 min trip and it did get a little better towards the end of the drive.
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CLK350
There won't be any back pressure issues by just straight piping it for the second exhaust?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
Last edited by Mikevercetti; Oct 22, 2010 at 11:30 PM.
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Corrolla
Thread Starter
Out Of Control!!
Joined: Apr 2008
Posts: 10,275
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From: Jerzy
04 CLK 320 > CLK32K
There won't be any back pressure issues by just straight piping it for the second exhaust?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
If you're thinking about doing what I I'd you would have to remove your stock muffler. Once you switch the spare wheel well, you no longer have enough room on the left side for the factory muffler. You need to get 2 new ones.
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From: A Canadian in Dubai, United Arab Emirates
'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
There won't be any back pressure issues by just straight piping it for the second exhaust?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
And Kevwood, when you say that was negated after the ECU adapted, are you talking about the stock ECU or are you implying that it will require a new ECU tune?
Oh, and Dyno, you mentioned the muffler too? To do that, I'd have to remove the stock muffler and do straight pipes to both sides?
The stock ECU will adapt to the mild changes made to the exhaust system/flowrates. If you want to speed up the process, reset the ECU before leaving the exhaust shop, the ECU will learn the new curve from the get go, not have to adapt to the changes after it's already adapted to driving styles/habits as well. I use to do this after every dyno tune/mod.
I personally believe that way too much is being made of having to re-flash an ECU after cutting the seconday cats and muffler, it will adapt. If you were cutting everything out then it could be a different story. I was involved in engine tuning for many, many years and learned/learned with a very reputable tuner in Canada who doesn't turn many mild projects out of his shop. If I thought for a second that this exhaust mod may cause an issue - I wouldn't do it and would warn others. I'm going to do my exhaust and intake system without an ECU flash and will dyno the car with a wideband for results.
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From: South Florida/New Jersey
2009 blk/blk C63 AMG, 2010 wht/blk c300 sport, 06 c280, 12 Triumph Daytona 675R wht/blk/red
Andy how are the performance gains from running a setup like that? i bet its LOUD as all hell too. i decided on just keeping my eisenmann race the way it is.. i was gonna start cutting tips off and make a nice dual or quad setup, but im pretty sure im just gonna leave it alone now.
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Corrolla
Andy how are the performance gains from running a setup like that? i bet its LOUD as all hell too. i decided on just keeping my eisenmann race the way it is.. i was gonna start cutting tips off and make a nice dual or quad setup, but im pretty sure im just gonna leave it alone now.
http://s230.photobucket.com/albums/e...traighpipe.mp4
Andy
. Be patient lol.
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Joined: May 2010
Posts: 620
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From: South Florida/New Jersey
2009 blk/blk C63 AMG, 2010 wht/blk c300 sport, 06 c280, 12 Triumph Daytona 675R wht/blk/red
Loud ? lol it was before I installed the 2 glasspacks to the system but after the sounds is good now. Here is the clip for cold start,
http://s230.photobucket.com/albums/e...traighpipe.mp4
Andy
http://s230.photobucket.com/albums/e...traighpipe.mp4
Andy
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From: A Canadian in Dubai, United Arab Emirates
'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
I know how to do it for the 500/550's but I'm not sure if it is the same for the 350's. There are a lot of ECU tuners around but the one I would recommend for a 'out of the box tune' (based on testimonials by lot's of MBWorld members) is Speedtunning USA. They have a few different tunes available depending on what mods you have.
Now, having said that, if you want to do it right (no offense to anyone with ST USA tunes), take your car to a dyno tuner after all your mods are done and have it custom tuned. From experience I can tell you that the gains and safety of doing it this way are unmatched, but, it comes at a cost.
Now, having said that, if you want to do it right (no offense to anyone with ST USA tunes), take your car to a dyno tuner after all your mods are done and have it custom tuned. From experience I can tell you that the gains and safety of doing it this way are unmatched, but, it comes at a cost.
MBWorld Fanatic!
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From: A Canadian in Dubai, United Arab Emirates
'05 C200K SS, '05 Kleemann CLK500K, '08 Hummer H3 & '92 Z34 5sp (track car in Canada)
Thread Starter
Out Of Control!!
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From: Jerzy
04 CLK 320 > CLK32K
Thanks.
The mufflers arrived already, just waiting for the heat shields. The tips are already at the exhaust shop. I'm thinking I will be finished by Wednesday.
