Mercedes SLK World banner

Status
Not open for further replies.
1 - 20 of 30 Posts

·
Premium Member
Joined
·
255 Posts
Discussion Starter #1
I have a Supersprint X-pipe that I'm looking to get installed....question, will the ECU compensate for a slightly more free flowing exhaust or do I need a retune of the ECU?
 

·
aka John
Joined
·
13,012 Posts
If you believe what Kleeman says, the stock tune will compensate for a more free flowing exhaust, but you could squeeze a bit more out if you did a tune. If you go headers, they recommend a tune..

Just finished - today - redoing my exhaust and fitting the headers - really does make a difference you can hear - now I just got to wait for it to dry up a bit to enjoy it! :)
 

·
Registered
Joined
·
369 Posts
I did basically the same, but with headers and 200 cell cats - it's right at the limit of civil. I assume you left the back boxes in?
Any pics you guys can share.

Last year I was looking at getting headers from Kleeman along with purchasing a SuperSprint X-pipe and having such installed.

I went to a Kleeman authorized dealer to get details and was told not to do the SuperSprint X-pipe, said it was a waist of money and to just go straight pipe, also mentioned to gut the muffler boxes.

Really what are the differences from say SuperSprint compared to Kleeman and the rest.

I had posted a thread asking to hear individuals different set-ups to assist but most had the supercharge, I'm not interested in that.

Also recomended the ECU.

You thought's.

Here are some STOCK pics from under my car.









 

Attachments

·
Premium Member 2006 SLK 280-sold
Joined
·
3,552 Posts
Nice Pics Dev7.

You and John should get along fine.

The bottom of your cars are so clean you could eat off of them !
 

·
Registered '07 SLK55
Joined
·
806 Posts
Kleemann said straight pipes were better than an X? I remember someone posting quite a long technical read about the benefits of an X pipe where the exhaust paths cross...
 

·
Premium Member 2006 SLK55 AMG (Kleemann K2)
Joined
·
10,723 Posts
I have SuperSprint X-pipe, Kleemann headers and Kleemann Tune and I am very satisfied with the power. No need for retune.

If you have headers you will need a retune because of the CEL light when accompanied with the Kleemann 2ndary cats.
 

·
Registered
Joined
·
369 Posts
Kleemann said straight pipes were better than an X? I remember someone posting quite a long technical read about the benefits of an X pipe where the exhaust paths cross...

Yup, that was right from the owner who is a authorized Kleeman dealer and the whole conversation just made me not so sure and hold off doing anything, just did not feel right. :(

If you could find that posting kindly share, would be appreciated :tu:
 

·
Registered
Joined
·
369 Posts
I have SuperSprint X-pipe, Kleemann headers and Kleemann Tune and I am very satisfied with the power. No need for retune.

If you have headers you will need a retune because of the CEL light when accompanied with the Kleemann 2ndary cats.
but you also have allot more going on, Kleeman supercharge :rb

did you see this video with the SuperSprint system

 

·
Premium Member 2006 SLK55 AMG (Kleemann K2)
Joined
·
10,723 Posts
^ I have seen it and I dont like its sound, the best SLS exhaust is brabus. I added the Kleemann S/C 2-3 years later.

It started 2ndary kleemann cats, ecu , green filters and ss x-pipe in 2006 ? if i am not mistaken.
 

·
aka John
Joined
·
13,012 Posts
Hey Dev7 - to answer your question in the other thread, yes, mine looked identical to yours before I started - unfortunately, I didn't have my camera with me when we started, so I don't have any really good "before" pictures.

Interestingly enough, my exhaust guys all said "absolutely must" have on the x-pipe for a V8 - loads of technical reasons that I think Arno posted up as well.
 

·
Registered
Joined
·
369 Posts
Hey Dev7 - to answer your question in the other thread, yes, mine looked identical to yours before I started - unfortunately, I didn't have my camera with me when we started, so I don't have any really good "before" pictures.

Interestingly enough, my exhaust guys all said "absolutely must" have on the x-pipe for a V8 - loads of technical reasons that I think Arno posted up as well.
I just had a bad gut feeling when the Kleeman dealer was saying no to the x-pipe, kinda makes you wonder if you want to take your car to have anything done at such a dealer.

I really don't want to just purchase and the ntake to someone because of concerns of any issues and because I supplied such basically my problem.

The x-pipe appears to be pretty simple and shouldn't be a concern but the headers could be a different story.

How long did it take the guys to do your work?
 

·
aka John
Joined
·
13,012 Posts
I just had a bad gut feeling when the Kleeman dealer was saying no to the x-pipe, kinda makes you wonder if you want to take your car to have anything done at such a dealer.

I really don't want to just purchase and the ntake to someone because of concerns of any issues and because I supplied such basically my problem.

The x-pipe appears to be pretty simple and shouldn't be a concern but the headers could be a different story.

How long did it take the guys to do your work?
Yeah, not sure what your dealer is up to - sorta flys in the face of conventional wisdom for any twin exhaust motor.

Couple of things to keep in mind. First, I wanted to be able to go back to stock easily in the event I ended up with something I didn't like. With that in mind, and given that I was working with a great shop, I decided to go for a full 2.5 stainless system from front to back. Second, the Kleemann headers have crap placement for the drivers side o2 sensor, so went into it knowing that we'd have to plug and re-drill at least one side.

As it turns out, I'd do a couple of things differently. The Kleemann headers, while very well made, do not fit the R171 very well. o2 sensor placement aside, there is almost no clearance on the drivers side between the heat shield and the body of the collector on the cat. Simply bending the pipes better would have solved this problem, and Arno and I (and evidently others) have reported this to Kleemann, but they have not changed the design.

Second thing is I think I would simply unbolt the front section, and just fab up a custom front section. This would give me my "return to factory" feeling, and I honestly think given me 90% of the performance change and noise I wanted. This would have been a very logical step in hindsight, and if I decided I wanted to then delete the resonator, I could have unbolted the rear section and had that modified as a second step adding the x-pipe.

If you don't want to retain the factory parts, I also would forgo the entire re-piping of the front section - I'd just remove the front cats, add the high-flows, and then weld into the existing tubing back to the secondary cats. I'd then cut just in front of the secondarys, and pipe straight into an x-pipe, or as I said above, into the center resonator.

I think the headers worked out to about 3 hours, as due to the re-drilling and extremely tight fit we had to jack up the motor a bit to get them in place, and then wasted some time trying to figure out if we could increase the clearance. The full fab of the 2.5 tubing took about another 3 hours, and more welds than I want to think about! :)

I'm quite happy with what I ended up with, but as I said in my thread - it's on the marginal side of civil - I'd be waking up the neighbors if I stepped on it on the way out of the driveway! :)
 

·
aka John
Joined
·
13,012 Posts
So the modifications on your car are headers, x pipe and tune ?
Yeah Mo - Kleemann Headers, Kleenman Hi-Flow Cats, 2.5 stainless front to rear, and x-pipe replacing the center cats and resonator with a Kleemann tune for all the above. Quaife LSD was installed late last year, along with an 030 Steering wheel and strut brace. I'm about out of mods, only thing I may do this year is update to a 2.5 COMAND. Been keeping my eye out for a used HK amp - if I find that, I'll start sourcing the head.

Now I'm just waiting on Cory to continue slashing the price on the M113 Kompressor kit until I can't resist anymore! ;-)
 

·
Premium Member
Joined
·
3,248 Posts
Just some minor additions to John’s comments,
MB uses crossovers on both the 350 and 55.
On the 350 it is an x-pipe and on the 55 a center resonator; the resonator has more back pressure but does a better job controlling the high rpm scream.
If you are building/have a dedicated race car that will live and die at max rpm, you don’t need a crossover.
But if you and your car live in the real world of low to mid rpm torque, you need the crossover!
As to the X-Pipe on the 55, I just love to expose people that annoy me to the screech of max rpm from my Beautiful Black Valkyrie :burnout:
 

·
aka John
Joined
·
13,012 Posts
I went to a Kleeman authorized dealer to get details and was told not to do the SuperSprint X-pipe, said it was a waist of money and to just go straight pipe, also mentioned to gut the muffler boxes.

Really what are the differences from say SuperSprint compared to Kleeman and the rest.

Hey - just re-read your original question - I wonder if the "gut the mufflers" is really "gut the center resonator"? If that's what they are suggesting, I can understand the logic - it would basically turn the resonator box into a really large free flowing x-pipe.

If they are suggesting running straight back to the back boxes, and gutting them, stay far away - you'll end up with a car that is so damned loud your ears will bleed.
 
1 - 20 of 30 Posts
Status
Not open for further replies.
Top