C55 Exhaust sneak peek pics inside
06-24-2009, 11:56 AM
#26
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06-24-2009, 02:44 PM
#27
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2006 C55
Guess I better get my eyes checked. For some reason mine looks a bit different.
Well if it is the virtually the same set up I think you'll be pleasantly surprised at the sound.
To my ear there is no drone issue at all and I travel 30 miles each way to work. Most of the trip is at between 65 - 80 mph (around 2,500 - 3K RPM's) and the sound is music to my ears.
Cold start is like a NASCAR. Warm start it is a sleeper until you rev it a bit.
I think everyone will be impressed with the results.
I'll stay tuned for the dyno results as I didn't have mine done since the upgrade.
Thanks.
Well if it is the virtually the same set up I think you'll be pleasantly surprised at the sound.
To my ear there is no drone issue at all and I travel 30 miles each way to work. Most of the trip is at between 65 - 80 mph (around 2,500 - 3K RPM's) and the sound is music to my ears.
Cold start is like a NASCAR. Warm start it is a sleeper until you rev it a bit.
I think everyone will be impressed with the results.
I'll stay tuned for the dyno results as I didn't have mine done since the upgrade.
Thanks.
06-26-2009, 09:24 AM
#30
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I'm not an expert, but I think it reduces noise/drone and increases airflow/backpressure.
By merging the two pipes together at an x-pipe, the outputs combine and the x-pipe acts as a noise filter and reduces drone.
The x-pipe increases airflow because the air from the two original pipes help push the air from the other pipe through.
By merging the two pipes together at an x-pipe, the outputs combine and the x-pipe acts as a noise filter and reduces drone.
The x-pipe increases airflow because the air from the two original pipes help push the air from the other pipe through.
06-26-2009, 12:32 PM
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An x-pipe is supposed to assist the scavenging of exhaust gases. In other words, when one exhaust pulse crosses the x-section, it helps pull the one behind it, keeping the velocity up.
For maximum benefit, the crossover (X or H format), should be no more than (if I recall correctly) 18"-22" behind the cylinder heads. Of course, that's not really practical in a street car, so it's usually just put wherever's most convenient, as forward as possible.
The decrease in drone and exhaust noise is a byproduct but certainly not the main function. An x-pipe will also typically produce a higher-pitched exhaust note under full throttle and up toward redline.
Bill
For maximum benefit, the crossover (X or H format), should be no more than (if I recall correctly) 18"-22" behind the cylinder heads. Of course, that's not really practical in a street car, so it's usually just put wherever's most convenient, as forward as possible.
The decrease in drone and exhaust noise is a byproduct but certainly not the main function. An x-pipe will also typically produce a higher-pitched exhaust note under full throttle and up toward redline.
Bill
06-27-2009, 02:30 PM
#32
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An x-pipe is supposed to assist the scavenging of exhaust gases. In other words, when one exhaust pulse crosses the x-section, it helps pull the one behind it, keeping the velocity up.
For maximum benefit, the crossover (X or H format), should be no more than (if I recall correctly) 18"-22" behind the cylinder heads. Of course, that's not really practical in a street car, so it's usually just put wherever's most convenient, as forward as possible.
The decrease in drone and exhaust noise is a byproduct but certainly not the main function. An x-pipe will also typically produce a higher-pitched exhaust note under full throttle and up toward redline.
Bill
For maximum benefit, the crossover (X or H format), should be no more than (if I recall correctly) 18"-22" behind the cylinder heads. Of course, that's not really practical in a street car, so it's usually just put wherever's most convenient, as forward as possible.
The decrease in drone and exhaust noise is a byproduct but certainly not the main function. An x-pipe will also typically produce a higher-pitched exhaust note under full throttle and up toward redline.
Bill
Knowledge is power and now you know.....(someone fill in the rest lol)
07-02-2009, 10:50 PM
#36
so the exhaust needs some refining? how are the headers coming along?
07-03-2009, 11:38 AM
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X-pipes were usually the first mod on my customers' lists.Bill
07-03-2009, 07:07 PM
#39
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Do you think it would be beneficial on our c55's? I have the res deletes and secondary cats removed.
07-03-2009, 07:09 PM
#40
i would imagine our mufflers are not straight through and have a relatively decent amount of baffles. i was recommended by some guy at an exhaust shop to change mine to something more straight through with less baffles, like a certain borla or something. i like the sound of mine though and i dont want to risk drone by switching.
07-04-2009, 12:43 PM
#41
AMG mufflers are straight through and have been for a very long time (with the exception of the C36 which used a baffle design). The resonators are also free flowing straight through design, that's why resonator delete & aftermarket catback mufflers make no power (and are a total waste of money when it comes to power, they are purely for sound). All the restriction is in the front half of the exhaust system. With high flow headers & cats you do not need aftermarket catback, there's more than enough sound to unlock from modding the front half of the stock system (which on most AMGs is not AMG at all but stock off the shelf MB system from lower non amg models).
07-04-2009, 04:35 PM
#42
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AMG mufflers are straight through and have been for a very long time (with the exception of the C36 which used a baffle design). The resonators are also free flowing straight through design, that's why resonator delete & aftermarket catback mufflers make no power (and are a total waste of money when it comes to power, they are purely for sound). All the restriction is in the front half of the exhaust system. With high flow headers & cats you do not need aftermarket catback, there's more than enough sound to unlock from modding the front half of the stock system (which on most AMGs is not AMG at all but stock off the shelf MB system from lower non amg models).
07-04-2009, 07:21 PM
#43
As you can see by the C55 diagram (attached below), The C55 already has an elongated X-pipe built into the system. Furthermore, the resonator & mufflers are free flowing.
The whole X-pipe trend started in the MB community when I confirmed the stock W210 E55 AMG exhaust system had no crossover of any kind and it was in that case that the X-pipe really made a significant difference (8HP+ @ wheels on loading dyno). Once I proved via dyno evidence that they do in fact make power on cars without the proper crossover built into the stock system, the trend snowballed and now everyone is slapping on X-pipes (in some cases when its not even necessary or beneficial) . On most newer cars they don't make that much of a difference with a few exceptions and now AMG is starting to incorporate more and more crossovers into their exhausts systems there by eliminating the need for them aftermarket.
The main bottle necks on the C55 exhaust system are the stock exhaust manifolds and the secondary cats. The primary cats aren't actually that bad and have the same cell cores as secondaries but they are much smaller and shorter. The secondaries are much larger/longer and also shaped oblong so they create turbulence. Upgrading the secondaries (or removing them all together) will get you between 10-13HP and 12-19TQ respectively as proven on dyno by us & hooleyboy.
80-90% of the gains to be had from the stock exhaust system are from the headers & 2nd cats, those two alone will provide significant gains in power especially post peak HP and pre-peak torque.
Remember, on these AMGs, the back half of the exhaust system is almost always free flowing. It is the front half of the stock system that requires all the attention. Once you do the shorty headers & high flow 2nd cats you will get the power & sound you are looking for.
Hope that helps,
~AMS~
The whole X-pipe trend started in the MB community when I confirmed the stock W210 E55 AMG exhaust system had no crossover of any kind and it was in that case that the X-pipe really made a significant difference (8HP+ @ wheels on loading dyno). Once I proved via dyno evidence that they do in fact make power on cars without the proper crossover built into the stock system, the trend snowballed and now everyone is slapping on X-pipes (in some cases when its not even necessary or beneficial) . On most newer cars they don't make that much of a difference with a few exceptions and now AMG is starting to incorporate more and more crossovers into their exhausts systems there by eliminating the need for them aftermarket.
The main bottle necks on the C55 exhaust system are the stock exhaust manifolds and the secondary cats. The primary cats aren't actually that bad and have the same cell cores as secondaries but they are much smaller and shorter. The secondaries are much larger/longer and also shaped oblong so they create turbulence. Upgrading the secondaries (or removing them all together) will get you between 10-13HP and 12-19TQ respectively as proven on dyno by us & hooleyboy.
80-90% of the gains to be had from the stock exhaust system are from the headers & 2nd cats, those two alone will provide significant gains in power especially post peak HP and pre-peak torque.
Remember, on these AMGs, the back half of the exhaust system is almost always free flowing. It is the front half of the stock system that requires all the attention. Once you do the shorty headers & high flow 2nd cats you will get the power & sound you are looking for.
Hope that helps,
~AMS~
Last edited by AMS Performance; 10-19-2011 at 09:08 PM.
07-05-2009, 12:34 AM
#44
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S600TT, R350
Once I proved via dyno evidence that they do in fact make power on cars without the proper crossover built into the stock system, the trend snowballed and now everyone is slapping on X-pipes (in some cases when its not even necessary or beneficial)
X-pipe makes no difference in power.
Mostly in sound.
And please do not preach me about your DYNO experience.
You have none.
07-05-2009, 05:36 AM
#45
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1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
07-05-2009, 04:47 PM
#47
You are in violation of the TOC rules, the moderators have been warned. Vendor on vendor attacks are not acceptable on MBworld.
However, coming from someone who owes thousands of dollars to his customers for many months and has yet to pay up. I'm not surprised of a childish & unprofessional attack like this. Vadim, if you were smart you would not attack others especially those in better standing than you.
From what I'm hearing from many of the MBworld members/vendors, you are the last person to be mocking anyone based on the incredibly shady behavior towards your customers. It would be a shame of many of these came to light publicly on the forum
You have been warned.
07-05-2009, 08:28 PM
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white and whiter
"omeyhomey" taking credit for MB modder using x-pipe is just hilarious.
something i found on youtube for AMS http://www.youtube.com/user/markland556
Last edited by FrankW; 07-05-2009 at 08:39 PM.
