This is in relation to BenzTurbo's thread on driving a MB hard. I removed the EGR devices off the motor, I have new injectors installed, all the strange noises are gone, It sounds like a mule gargling marbles. starts easy, no smoke. would I gain anything by replacing the muffler with a more free flowing one or even straight pipe?

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1993 MB 300D 245K died.

Hmm... I can't say I'm familiar with this sound.

Dkr.

I searched youtube for "mule gargling marbles". This is what I got:

https://www.youtube.com/watch?v=wtX-o7IyvNI

I don't think that's what the OP's car sounds like.

Straight piping will get you some more noise and maybe a little quicker turbo spool up. I've been considering straight piping mine just for the sound, but I haven't gotten around to it yet.

We have a performance sub forum here for hot rodding the diesels. I'm sure this has been covered there. As for me, when I want to go fast, I just ride my motorcycle.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

i want to get get an exhaust off a 300d at the pick n pull so i can cut the rear muffler off and make a nice looking straight pipe that comes out at 45 degrees but still tucked under the car for the most part. i will leave the resonator to help with any drone and because i would get tired of very loud exhaust all the time. i want to keep my cd's exhaust because i'm sure it is coupe specific and i will probably want to re install it one day after i have my fun with "big truck" exhaust

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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect

It depends...
If your catalytic converter is partially plugged, straight piping will certainly improve performance. If everything is right though, only minor changes, and sound will increase.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I want my car to sound like this!

It purrs at the moment but this is the sound I need for a classical car.

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Sam

84 300SD 350K+ miles ( Blue Belle )

The Mufflers on a w123 are already a straight through design. So replacing them with a Cherry Bomb, Glass pack, or some type of performance type muffler won`t do much to increase your Dyno seat of the pants off the line to the next red light, or time off the clock.







Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I think you will find that a straight pipe, if you go that way, will sound really "blatty" or sharp and unpleasantly loud at some points in the rev range. I had a straight pipe unintentionally a long while back when my exhaust broke ahead of the muffler. Did not like it at all.

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Objects in closer are mirror than they appear.

I've run a DT466 International and heard several N-Series Cummins engines straight piped. They sounded pretty good to me.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

I see ...........
I live in an area flooded with straight-piped diesel exhausts. Dodge, Ford, Chevrolet and a myriad of medium and heavy duty trucks. As usual, they just sound like they have more oomph. Personally, I could do without all the noise pollution.

I had a diesel Ford that the PO had installed glass-pack mufflers on. Hated the noise, especially on any trip greater than 30 minutes. I've seen/heard vehicles with a "rumbling" exhaust noise that isn't too bad. But, as previously mentioned, a "blatty" exhaust note just sounds immature to me. (Fart can exhausts come to mind.) On a classic car, I just don't see the point.

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Sam

84 300SD 350K+ miles ( Blue Belle )

well that settles that. not much gain for a lot of extra noise

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1993 MB 300D 245K died.

Have you done the wastegate swap yet? On both of mine, I recovered power I hadn't even known I'd lost.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

I removed the egr and the throttle plate device, the turbo is working. I just replaced the injectors with monarks as well as replacing all the vacuum lines. For all this effort I got from snail speed to land tortoise.

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1993 MB 300D 245K died.

I thought the W124 diesels were supposed to be considerably faster than a 123 turbo.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

After straight piping my car it feels like I gained about ten hp, lower in the rpm range, and turbo spools up about 500rpm sooner at least. As for people saying it will be too loud, it's only loud if the exhaust doesn't exit outside from under the car (if the exhaust exit is under the car it's loud). Go auth a turn down tip and you should be good.

Also, I think I saw a post about about a catalytic converter I think? Pretty sure these diesels never had them

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint