SL500 - resonator deleted, Carlsson box installed - Mercedes-Benz Forum
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post #1 of 17 (permalink) Old 04-26-2019, 09:44 AM Thread Starter
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SL500 - resonator deleted, Carlsson box installed

So my "treasured" Carlsson rear box is finally installed and resonator deleted. I must admit, I was a little uneasy about deleting the resonator at first, watched quite few video clips and listened the sound clips. Renntech used it on their cars, mahunt recently posted nice pictures of the "eliminator" piece and since the late R129's did not come with the resonator at all, I got rid of mine.

Very nice young guys with great skills and car enthusiasts, they do great custom work https://www.facebook.com/eagexhaust/

Results - could not be happier! It's deep buttery at the start and under load, and yet, while just cruising at any speed, there is absolutely NO drone and annoying tones. Driving home from the shop yesterday, purposely took a longer route, with highway and twisty river road mixes, never turned on the radio once for 40 min drive. Just enjoyed the variations of these very very pleasing buttery tones of new exhaust.

WP_20180705_19_49_23_Pro by Duh_Vinci, on Flickr

20190425_144901 by Duh_Vinci, on Flickr

P1010977 by Duh_Vinci, on Flickr

2019-04-26_12-52-14 by Duh_Vinci, on Flickr

Regards,
D
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post #2 of 17 (permalink) Old 04-26-2019, 10:38 AM
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I too was pleasantly surprised at the very reasonable tone improvement from my own efforts.

The resonator eliminator adds just the right amount of exhaust note without overwhelming the whole setup. It is magical.

For anyone contemplating the switch to resonator eliminator (98 and earlier cars), bear in mind that this is what MB did to the 99 and up V8 SL500. I happen to think this is the sole reason for whatever performance improvement was "gained" by the switch from the M119 engine to the M113.

I will be visiting the dragstrip in a few weeks to see if there is any performance improvement with the resonator eliminator on my car from last 1/8th mile time of 9.02 seconds.
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post #3 of 17 (permalink) Old 04-26-2019, 11:19 AM Thread Starter
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Quote:
Originally Posted by mahunt View Post
...The resonator eliminator adds just the right amount of exhaust note without overwhelming the whole setup. It is magical.
Well said, it really is magical, very pleasant to the ear!

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...I will be visiting the dragstrip in a few weeks to see if there is any performance improvement with the resonator eliminator on my car from last 1/8th mile time of 9.02 seconds.
I would be very interested to hear about your results. Its almost silly to mention, but for what it's worth... My "butt-dyno" (sure, can be attributed to placebo effect), but after quite few miles with in the last 24 hours after this new exhaust pieces, the car feels a little different. M119, generally seem to "wake up" at 3000 rpms (or so)... And this wake up is fairly noticeable. Not any any longer (or so it seems), even with the light throttle, the wake up starts a bit earlier, as if one is seeing an earlier rise and smoother rpm/torque curve than it was before, it is almost "effortless" with lighter pedal feel under acceleration?

Am I imagining things? Maybe, however, to me, the car feels a bit more light footed. Next - going to swap my factory LH module for the WOT enrichment unit and allow the adaptation to take place.

Regards,
D
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post #4 of 17 (permalink) Old 04-27-2019, 06:06 AM
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My V12 also seems quicker, but that's why I'm going to the dragstrip to see if it's just my imagination.

Even if it isn't quicker, the car is more enjoyable to drive just because of the exhaust feedback.
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post #5 of 17 (permalink) Old 04-27-2019, 10:28 AM Thread Starter
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Good! I'm glad you too feel the difference! Your numbers will show, please share. For now, indeed, just more enjoyable car with this exhaust feedback for sure.

Regards,
D
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post #6 of 17 (permalink) Old 04-27-2019, 01:05 PM
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Do you think it would change the m113?

Quote:
Originally Posted by duh_vinci View Post
Good! I'm glad you too feel the difference! Your numbers will show, please share. For now, indeed, just more enjoyable car with this exhaust feedback for sure.

Regards,
D
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post #7 of 17 (permalink) Old 04-27-2019, 01:11 PM Thread Starter
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Do you think it would change the m113?
Your car is 1999, not sure if there is any difference in month of the build, but you most likely already have the resonator missing from factory (check under the car, see if there is a second box just before the driver's side axle (2 pipes in one out)?

Regards,
D
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post #8 of 17 (permalink) Old 04-27-2019, 01:17 PM
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Oh yes, I am missing the resonator.

Quote:
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Quote:
Originally Posted by sully1218 View Post
Do you think it would change the m113?
Your car is 1999, not sure if there is any difference in month of the build, but you most likely already have the resonator missing from factory (check under the car, see if there is a second box just before the driver's side axle (2 pipes in one out)?

Regards,
D
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post #9 of 17 (permalink) Old 04-28-2019, 07:56 AM
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If it's good enough for the factory 1999 and up V8 R129s, then it's good enough for the earlier cars.
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post #10 of 17 (permalink) Old 04-28-2019, 12:13 PM
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You guys comparing m113 to m119(pre1998, post 1998). M113 of later ‘98 is missing resonator from factory. M19 came with one from factory. Be advised, depending on numerous things, in general, reducing backpressure May free a few ponies, but usually at the cost of low end torque. If loosing the resonator reduces backpressure, torque may drop on low end. Seems like the engineers at MB probably figured best for the task a 129 was to fill, in other words, best all around performance. I believe changes will garner improvements, but not across the spectrum. Gaining on one end but loosing on another is what I believe will be the result. Nothing wrong with that. Best know the consequences so an informed decision can be made. Seems like a lot of mental masturbation for “noise”... If someone has torque/power curves to share, then all would have info to make an informed decision... 1 test can cure a thousand opinions.

Best Regards...

RM Smith
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Where is it again that we are going... And why are we in a handbasket?
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