|
|
|
#1
|
||||
|
||||
1987 300SDL Straight Pipe
Lately I've been really tempted to straight pipe my car. I have a good friend who would do the work for me, so that's not the issue. Plus I'm doing it mostly for sound. I know a lot of the purists probably aren't a big fan of taking out the refinement of these diesels. I've just been really tempted to do this for a long time now.
What are the pros/cons to straight piping this car? What do I need to look out for? Any advice would be great.
__________________
1987 300SDL 271,000 1999 E300 Turbodiesel 155,000ish. (Dad's) |
#2
|
||||
|
||||
I've been running a 2.5" straight pipe from the turbo to the back for 5 years, sounds great, works great, low maintenance.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#3
|
||||
|
||||
2cents
'
cons; noise/droning pros: everything else I will go with muffler only soon ..... .
__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded next wish/project: w114 coupe OM603 powered |
#4
|
||||
|
||||
Quote:
How does it sound at 70-80 MPH?
__________________
1987 300SDL 271,000 1999 E300 Turbodiesel 155,000ish. (Dad's) |
#5
|
||||
|
||||
How about 110-115 where I frequently cruise on my 2 hour commutes???? I cannot imagine this car would run any harder and it has bone stock exhaust and dual mufflers...FWIW
__________________
Did you just pass my 740 at 200 kmh in a 300SD????? 1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership |
#6
|
|||
|
|||
My brother has been running a straight pipe on his Cummins TD for quite a while. The sound seems more in keeping with his D250 4WD than it would on a 126! I would think the only negatives to be the noise, and possible resonance issues.
__________________
Chief 1991 350SD |
#7
|
||||
|
||||
Its hardly any different, no annoying drone or anything, at least not to me. The engine itself is louder at those speeds than the exhaust system.
The straight pipe does improve off the line torque slightly by allowing the turbo to spool/boost a bit faster. I think the sound is awesome.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#8
|
||||
|
||||
Quote:
That's good to hear. Does it make a difference to remove the resonator? I was thinking about just straight piping it from the resonator back. Any suggestions on that? Unfortunately, I have to keep the CAT on for emission reasons.
__________________
1987 300SDL 271,000 1999 E300 Turbodiesel 155,000ish. (Dad's) |
#9
|
|||
|
|||
Throw in an Exhaust Cut Out system, manual or electric, and you will be happy to control the noise whenever you want.
QTP » Electric Exhaust Cutouts |
#10
|
|||
|
|||
Quote:
No noticeable increase in noise and less to maintain under the vehicle. |
#11
|
||||
|
||||
Just make sure the tail pipe makes it past the rear bumper. I had mine flush (on a w123) and the droning was insane.
__________________
$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#12
|
||||
|
||||
I have 2.5" straight through a flow-through muffler only on my 300SD. It makes a nice deep rumble. I used the car for several days idling at 1,000 RPM to power an inverter during a power outage. The neighbors definitly know when the car was running, but then again they still would have with the resonaitor installed as well. I got no complaints from them.
One other advantage it the dogs know well in advance when I'm on my way home. Here are some pictuers: Welded the new exhaust
__________________
http://i284.photobucket.com/albums/l...aman/Fleet.jpg Peach Parts W124.128 User Group. 80 280SL 85 300SD 87 300TD 92 300D 2.5 Turbo 92 300TE 4Matic |
#13
|
||||
|
||||
Quote:
no significant noise increase, just slight cool turbo spool sound... terrific. .
__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded next wish/project: w114 coupe OM603 powered |
#14
|
||||
|
||||
on my Coupe, i have a 3-inch custom pipe, starting at the resonator all the way back, with a 3 1/4 inch chrome tip......nice bass sound at cruising speeds, reminds me of the sound of an old B.M.W. 6-series, has nice howl when running full speed ahead at like 75+
__________________
-Justin I believe in extreme automotive perfection whenever possible.......there is no such thing as "It doesn't matter" !!! 1985 300 CDT - 287k miles 1980 240 D - 340k miles With extras !! http://facebook.com/BenzDieselTuner http://facebook.com/SWFLAlternativeFuelsClub http://facebook.com/SWFLBenzClub http://SWFLBenzClub.com |
#15
|
|||
|
|||
I have 3 1/4" straight pipe from my turbo back (yes, down pipe and all). It sounds verry nice with a fair amount of turbo sound.
The turbo on a diesel works as an effective muffler. My car is from CA and it still has the oxidizer on it. I am looking for a good deal on a mig to weld up a straight pipe and eliminate it. I wonder how low the turbo will spool then. It has resulted in better performance (torque and hp), a bigger smile on my face, and better sounds. I look forward to the 4 speed swap this summer and the oxidizer delete. It will sound great, especially between shifts, and will be a gem to drive. |
Bookmarks |
|
|