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  #1  
Old 02-25-2021, 01:26 PM
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W124: What would be effect of deleting resonator?

The exhaust on my 91 300D just rusted out around the back of the resonator. I don't know yet whether or not the resonator can be saved...taking it to exhaust shop next week. If the resonator can't be saved, what would be the effect of deleting it and simply running straight pipe to the muffler? I don't mind it being a bit louder but I'd be annoyed by a drone.

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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
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Last edited by shertex; 02-25-2021 at 02:36 PM.
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  #2  
Old 02-25-2021, 03:39 PM
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It could create a drone, my guess is it would. Really won't know how much for sure without trying. May want to ask the exhaust shop.

Please report back your findings.

Good luck!!!
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Old 02-25-2021, 03:48 PM
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I can tell you. I’ve done it. Same exact problem with the resonator rusting. I just had a muffler shop replace the rsonator with a straight pipe.
It sounds fine. Only slightly louder. No drone
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  #4  
Old 02-25-2021, 05:16 PM
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Quote:
Originally Posted by Phillytwotank View Post
I can tell you. I’ve done it. Same exact problem with the resonator rusting. I just had a muffler shop replace the rsonator with a straight pipe.
It sounds fine. Only slightly louder. No drone
Excellent news...thanks!
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #5  
Old 02-26-2021, 09:48 AM
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Quote:
Originally Posted by Phillytwotank View Post
I can tell you. I’ve done it. Same exact problem with the resonator rusting. I just had a muffler shop replace the rsonator with a straight pipe.
It sounds fine. Only slightly louder. No drone
Had to do the same on my '91 300D about two years ago. Straightpiped to the muffler (deleted resonator). I've done several 200+ mile roadtrips. No drone.
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  #6  
Old 02-26-2021, 10:48 AM
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I have done it too numerous times with not much noticeable effect....a little rumble at idle.
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..I also have a 427 Cobra replica with an aluminum chassis.
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  #7  
Old 02-26-2021, 10:16 PM
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Quote:
Originally Posted by shertex View Post
I don't mind it being a bit louder but I'd be annoyed by a drone.
My '83 SD - my first MB owned - came with a straight pipe. I had always noticed a mild drone which was confirmed when i got the '85 SD (with the resonator) which didn't have the drone.

It bothered me enough to pull one from a junkyard car.
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  #8  
Old 03-04-2021, 05:50 PM
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Resonator gone....no drone.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife
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  #9  
Old 03-06-2021, 09:19 AM
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I run a 2.25" straight pipe on my 617 powered Studebaker. It is not loud at all and sounds like a baby cummins. A little turbo whine from time to time.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #10  
Old 04-12-2021, 08:39 PM
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I deleted the muffler with straight pipe and left the resonator. No drone.
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  #11  
Old 04-13-2021, 11:59 PM
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I love the sound of a straight pipe straight 5
https://www.youtube.com/watch?v=K4k4OnG9GQQ

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