W211 AMG Discuss the W211 AMG's such as the E55 and the E63
Sponsored by:
Sponsored by:

Design of X-Pipe Important?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 01-03-2009, 07:45 PM
  #1  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
Design of X-Pipe Important?

Ok, so i learned a load from Gayton's position post, so i thought we may do as well with the design of the pipe?

What steps would one go through to find the optimal length, angle, mixing hole, etc. of an X-pipe. Now I understand some of what the guy was doing at JBA by trying different ones and spraying them. Does it follow the same concept of basically trying to find a design that does not have pressure points (hot spots)?
Old 01-03-2009, 08:06 PM
  #2  
Banned
 
E55Pilot's Avatar
 
Join Date: May 2008
Posts: 460
Likes: 0
Received 2 Likes on 1 Post
2004 E55
Originally Posted by jangy
Ok, so i learned a load from Gayton's position post, so i thought we may do as well with the design of the pipe?

What steps would one go through to find the optimal length, angle, mixing hole, etc. of an X-pipe. Now I understand some of what the guy was doing at JBA by trying different ones and spraying them. Does it follow the same concept of basically trying to find a design that does not have pressure points (hot spots)?
all exhaust systems will have a resonate point, that's what the hot spot is. The length of the crossover pipe doesn't really matter, just that you have it. Pipe dia for our cars should be in the 2.5" range (4.91 square inches)
Old 01-03-2009, 08:09 PM
  #3  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
Originally Posted by E55Pilot
all exhaust systems will have a resonate point, that's what the hot spot is. The length of the crossover pipe doesn't really matter, just that you have it. Pipe dia for our cars should be in the 2.5" range (4.91 square inches)
The guy at JBA was very critical about the angle of approach on the tubes coming in. Any thoughts on the importance of that? It really comes to what do we pay for? Do we buy a pre-fabbed one that is "tuned" for our cars or have a muffler shop make one as they mod the exhaust?
Old 01-03-2009, 08:10 PM
  #4  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
BTW, our pipes are 2.75" each with some restriction points getting smaller.
Old 01-03-2009, 08:17 PM
  #5  
Banned
 
E55Pilot's Avatar
 
Join Date: May 2008
Posts: 460
Likes: 0
Received 2 Likes on 1 Post
2004 E55
Originally Posted by jangy
The guy at JBA was very critical about the angle of approach on the tubes coming in. Any thoughts on the importance of that? It really comes to what do we pay for? Do we buy a pre-fabbed one that is "tuned" for our cars or have a muffler shop make one as they mod the exhaust?
No such thing as a prefab'd unit that is tuned to the car, there are prefab'd X pipes that would work just fine.

Have your exhaust guy order up a Magnaflow 10791 $218 install it at the point of greatest dynamic pressure (The burn off spot) and call it a day
Old 01-03-2009, 08:19 PM
  #6  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
Originally Posted by E55Pilot
No such thing as a prefab'd unit that is tuned to the car, there are prefab'd X pipes that would work just fine.

Have your exhaust guy order up a Magnaflow 10791 $218 install it at the point of greatest dynamic pressure (The burn off spot) and call it a day

I've got a VRP one installed where the resonator was. Any reason not to use it? I will obviously take it off and have the shop find the hot spot.

What do I do if the pressure point isn't where the pipes run parrallel? Just worried that it will be up closer to the spot where the primary cats are...
Old 01-03-2009, 08:20 PM
  #7  
MBWorld Fanatic!
 
Benz-O-Rama's Avatar
 
Join Date: Apr 2006
Location: Maryland
Posts: 8,137
Likes: 0
Received 25 Likes on 17 Posts
Eurocharged 2004 E500, Eurocharged ECU/TCU 2005 SL600, 2010 Caddy SwaggerWagon
Originally Posted by jangy
Ok, so i learned a load from Gayton's position post, so i thought we may do as well with the design of the pipe?

What steps would one go through to find the optimal length, angle, mixing hole, etc. of an X-pipe. Now I understand some of what the guy was doing at JBA by trying different ones and spraying them. Does it follow the same concept of basically trying to find a design that does not have pressure points (hot spots)?
Gayton? Aw, that's just wrong.

I was wondering the same thing but didn't want it to get lost in the other thread. So, I'm learning that the design doesn't really matter that much either. Using that logic, one could take an OEM x-pipe from a different car, and be ok? Let's say I had a x-pipe from a Ford GT, no problem on my E500?
Old 01-03-2009, 08:22 PM
  #8  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
Originally Posted by Benz-O-Rama
Gayton? Aw, that's just wrong.
Damn spellcheck!! After Brazil, NOBODY will doubt your hormonal polarity...

I was wondering the same thing but didn't want it to get lost in the other thread. So, I'm learning that the design doesn't really matter that much either. Using that logic, one could take an OEM x-pipe from a different car, and be ok? Let's say I had a x-pipe from a Ford GT, no problem on my E500?
HAHA!! Learning learning..... I love some new blood to teach me stuff....
Old 01-03-2009, 08:36 PM
  #9  
Banned
 
E55Pilot's Avatar
 
Join Date: May 2008
Posts: 460
Likes: 0
Received 2 Likes on 1 Post
2004 E55
Originally Posted by Benz-O-Rama
Gayton? Aw, that's just wrong.

I was wondering the same thing but didn't want it to get lost in the other thread. So, I'm learning that the design doesn't really matter that much either. Using that logic, one could take an OEM x-pipe from a different car, and be ok? Let's say I had a x-pipe from a Ford GT, no problem on my E500?
I posted a part number, that's what you want to use
Old 01-03-2009, 08:36 PM
  #10  
Banned
 
E55Pilot's Avatar
 
Join Date: May 2008
Posts: 460
Likes: 0
Received 2 Likes on 1 Post
2004 E55
Originally Posted by jangy
BTW, our pipes are 2.75" each with some restriction points getting smaller.
An exhaust system is only as large as the smallest restriction

If you need a to go 3" use part number 10792

Last edited by E55Pilot; 01-03-2009 at 08:40 PM.
Old 01-03-2009, 08:40 PM
  #11  
Out Of Control!!
Thread Starter
 
jangy's Avatar
 
Join Date: Sep 2004
Location: San Diego
Posts: 13,394
Likes: 0
Received 4 Likes on 4 Posts
2015 S212
Originally Posted by E55Pilot
An exhaust system is only as large as the smallest restriction
That is what he said, so he cut two out and welded a pipe in their place. Now, my system is not a bolt together anymore.
Old 01-03-2009, 08:52 PM
  #12  
MBWorld Fanatic!
 
Benz-O-Rama's Avatar
 
Join Date: Apr 2006
Location: Maryland
Posts: 8,137
Likes: 0
Received 25 Likes on 17 Posts
Eurocharged 2004 E500, Eurocharged ECU/TCU 2005 SL600, 2010 Caddy SwaggerWagon
Originally Posted by E55Pilot
I posted a part number, that's what you want to use
Shoot. I missed that. THX

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Design of X-Pipe Important?



All times are GMT -4. The time now is 09:04 AM.