Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion > Diesel Performance Tuning

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-05-2011, 06:11 PM
Registered User
 
Join Date: Jul 2004
Posts: 7,334
Larger exhaust on a w123 wagon 617-95X

Post what you've done to make a larger exhaust for the stock turbo (or non stock turbo) and include details. I'm looking to make my exhaust larger and remove some back pressure, but not spend over the top kind of money.

Reply With Quote
  #2  
Old 01-05-2011, 10:06 PM
Duckinator's Avatar
Registered User
 
Join Date: Sep 2010
Location: Seattle, WA
Posts: 50
2.5" Turbo Back

This was on a W126, but the same idea... I cut the center resonator out, clamped on a straight pipe (2.5"). Also, I cut the rear muffler off, clamped on more straight pipe with a turn down at the end. I also have a 3" tip clamped to the turn down. I think it sounds good, as do a few of the kids at school. The turbo spooling and whistle is amazing. Cost was about $40-50 ish total. Good Luck!

These turbos aren't pushing a huge amount of air so 2.5" is just fine, 3" is alright if that's what you feel like running.
__________________
'81 300SD- OM617.951, Euro Head Lights, Hella 550's, 2.5" Turbo-Back Straight Pipe, ALDA Removed, Camo Dash + Seat Covers, Boost Gauge, DU Floor Mats, Cobra CB, LED Trunk lights, and other things...


'03 Chevy CCSB LT LB7 "P-Stroke Killer"
219K mi. - AirDog II 165, EFI Live, Alligator Stage V, ISSPRO EV2 Pyro/Boost, PPE Boost Valve, LML Manifold, MBRP Downpipe, Debadged, Bills Custom 3.5" Turbo Horn, B&W Hitch, S&B Intake
Reply With Quote
  #3  
Old 01-05-2011, 10:57 PM
Registered User
 
Join Date: Jul 2004
Posts: 7,334
I've already deleted the rear muffler and kept the center muffler/resonator. I have a down turn out the rear of a wagon and despite what some said would be a sooted rear it stays clean. I'm pushing the limit on the stock turbo at up to 17 psi but hope to soon install a variable vane turbo and pump more air- I have a myna pump that will soon be giving me enough fuel to utilize alot more air. I want that extra air to leave with as little hassle as possible, but do not want a drone or super loud exhaust.
Reply With Quote
  #4  
Old 01-06-2011, 07:16 AM
Banned
 
Join Date: Jan 2011
Location: Colorado
Posts: 474
Not much point on going bigger unless you're making serious power. The stock exhaust is already large compared to most cars, even V8s.
Deleting the two mufflers helps, but they aren't a significant restriction since they are straight through flow.

If you don't want drone or noise then a 3" with a straight flow muffler will be more than plenty for the power a 617 can hold.

Hook up an H20 gauge post turbo and I bet you'll be surprised how low backpressure is even with one muffler remaining.
Reply With Quote
  #5  
Old 01-06-2011, 08:34 AM
layback40's Avatar
Not Banned
 
Join Date: Nov 2009
Location: Victoria Australia - down under!!
Posts: 4,023
Quote:
Originally Posted by MTUpower View Post
I've already deleted the rear muffler and kept the center muffler/resonator. I have a down turn out the rear of a wagon and despite what some said would be a sooted rear it stays clean. I'm pushing the limit on the stock turbo at up to 17 psi but hope to soon install a variable vane turbo and pump more air- I have a myna pump that will soon be giving me enough fuel to utilize alot more air. I want that extra air to leave with as little hassle as possible, but do not want a drone or super loud exhaust.
Correct me if I am wrong.
My understanding was that the variable vane just allowed the turbo to boost at much lower loads, that is spooled up early without sacrificing top end.

Are you planning a bigger turbo with variable vane?
How do you plan on controlling the variable vane? Isnt it electronically controlled by the motors engine management system (on the late models).
Is there a simple control system that can be put on the variable vane for the older motors?

Best have a decent inter-cooler.
__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
Reply With Quote
  #6  
Old 01-06-2011, 04:15 PM
Registered User
 
Join Date: Jul 2004
Posts: 7,334
The myna pump install is coming along- but there are a few small snags. I felt quite a difference removing the rear muffler with my altered stock pump, and so I'm looking forward to the next steps after the myna install, which is the reason for this thread.

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:54 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page