Exhaust question
Exhaust question
Will it be much louder with rear muffler delete? Some sound is OK, but my wife will be using this car so I don't want it too loud.
GileadGarage
07-07-2009, 12:44 PM #1My 82 TD is going in to a local exhaust shop to get the rear section replaced, there is a hole at the rear hanger and I'm getting some fumes in the car. I want them to bend up a (3"?) pipe to go from the slip connection ahead of rear axle straight out the rear past bumper, the front section is in very good condition (oil leaks probably helped that) so I'm leaving that in place.
Will it be much louder with rear muffler delete? Some sound is OK, but my wife will be using this car so I don't want it too loud.
(07-07-2009, 12:44 PM)GileadGarage My 82 TD is going in to a local exhaust shop to get the rear section replaced, there is a hole at the rear hanger and I'm getting some fumes in the car. I want them to bend up a (3"?) pipe to go from the slip connection ahead of rear axle straight out the rear past bumper, the front section is in very good condition (oil leaks probably helped that) so I'm leaving that in place.
Will it be much louder with rear muffler delete? Some sound is OK, but my wife will be using this car so I don't want it too loud.
If your wife is going to drive it I would say its maybe to loud. Its not overly obnoxious but its certainly noticeable.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
(07-07-2009, 12:44 PM)GileadGarage My 82 TD is going in to a local exhaust shop to get the rear section replaced, there is a hole at the rear hanger and I'm getting some fumes in the car. I want them to bend up a (3"?) pipe to go from the slip connection ahead of rear axle straight out the rear past bumper, the front section is in very good condition (oil leaks probably helped that) so I'm leaving that in place.
Will it be much louder with rear muffler delete? Some sound is OK, but my wife will be using this car so I don't want it too loud.
If your wife is going to drive it I would say its maybe to loud. Its not overly obnoxious but its certainly noticeable.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
ForcedInduction
07-07-2009, 06:48 PM
#3
It will have a deeper rumble, but it won't be nearly as loud as a complete straight pipe with the resonator still in place.
(07-07-2009, 08:36 PM)ForcedInduction No it doesn't.
Thanks, I'm gonna go with the straight pipe, probably 3". The shop is really good, they did a 2.5" in the Audi which came out great (although too loud), was a very difficult exhaust to do.
GileadGarage
07-07-2009, 08:48 PM #6(07-07-2009, 08:36 PM)ForcedInduction No it doesn't.
Thanks, I'm gonna go with the straight pipe, probably 3". The shop is really good, they did a 2.5" in the Audi which came out great (although too loud), was a very difficult exhaust to do.
Sounds/looks really good with the fr muffler and straight pipe out the back, not too loud, but it is audible on the high way. I likke the sound of some tailpipe, not sure how differnt it would sound with a muffler at the r only. They did a beautiful job as usual, next the Samurai will go in (I tore the entire exhaust out from the mani back wheelin).
The oil leaks are much better too, now its time to put some miles on it for the rest of the summer. Engine/manual trans swap plans on hold for a while since I just got started on a turbo engine swap in the Audi.
(07-07-2009, 11:15 PM)Motorhead I will use a 3" on my CD but wonder what I should do for sound control, use a resonator mid pipe or a big muffler on the tail?
GileadGarage
07-15-2009, 10:19 PM #8Sounds great, not too loud but wife still asked why its coming back from the exhaust shop louder then when it went in. (I told her it needed a special muffler which was too expensive, so we went with out it to save some money) She also asked me why I lowered it, said "If anything, should'nt we raise it a bit?!?!"
Sounds/looks really good with the fr muffler and straight pipe out the back, not too loud, but it is audible on the high way. I likke the sound of some tailpipe, not sure how differnt it would sound with a muffler at the r only. They did a beautiful job as usual, next the Samurai will go in (I tore the entire exhaust out from the mani back wheelin).
The oil leaks are much better too, now its time to put some miles on it for the rest of the summer. Engine/manual trans swap plans on hold for a while since I just got started on a turbo engine swap in the Audi.
(07-07-2009, 11:15 PM)Motorhead I will use a 3" on my CD but wonder what I should do for sound control, use a resonator mid pipe or a big muffler on the tail?
Herrmanator8
07-16-2009, 02:37 PM #10My 83' SD is way too quiet! I removed the muffler hoping for some more tone and was still just as quiet. It has a brand new complete system on it but i want it gone. Is it bad for these cars to remove the midpipe muffler and make it a straight pipe? I have heard that it is needed for backpressure but is there any other way i can get the pressure and get the sound of a cummins??? its quiter than my brothers 4 cyl gasser.
ForcedInduction
07-16-2009, 02:41 PM
#11
Backpressure is bad for diesels. Those twin "kidneys" do most of the muffling.
Herrmanator8
07-16-2009, 03:01 PM #12so taking the midpipe off the car wouldnt hurt it? and also i have read that when they test diesels for emissions they only test the exhaust smoke density. do they test sound?
If you want that Cummins sound you will have to add a cylinder, the backpressure will slow the spool of the turbo and not help boost. As of right now in Califorina they don't care about old Merc. diesels so anything goes, give them time or money and we will be the next target.
Herrmanator8
07-16-2009, 11:36 PM #14thanks i had already taken off the mid pipe and took it out for a drive and it sounds awesome enough for me! as for california, I couldnt live more east. ct is crackin down on emission though.
However, best option is custom downpipe and no muffler.
http://superturbodiesel.com/std/custom-e...t-330.html
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
It's not too much louder, but the rear muffler isn't the restrictive one. If anything, removing the middle muffler is a much better performance mod.
However, best option is custom downpipe and no muffler.
http://superturbodiesel.com/std/custom-e...t-330.html
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
(07-19-2009, 09:55 PM)kamel It's not too much louder, but the rear muffler isn't the restrictive one. If anything, removing the middle muffler is a much better performance mod.
However, best option is custom downpipe and no muffler.
http://superturbodiesel.com/std/custom-e...t-330.html
The mid muffler may be more restrictive since its smaller, but mine was in good shape so I left it. If I were doing a full new exhaust, I'd probably go with a R only.
Does not have the fart sound (or crackle) though, sounds very deep.
We took the car this weekend on a bit of a tour with some friends who are "non car people", they commented that it was loud (and also complained of an oil smell).
GileadGarage
07-19-2009, 10:45 PM #17(07-19-2009, 09:55 PM)kamel It's not too much louder, but the rear muffler isn't the restrictive one. If anything, removing the middle muffler is a much better performance mod.
However, best option is custom downpipe and no muffler.
http://superturbodiesel.com/std/custom-e...t-330.html
The mid muffler may be more restrictive since its smaller, but mine was in good shape so I left it. If I were doing a full new exhaust, I'd probably go with a R only.
Does not have the fart sound (or crackle) though, sounds very deep.
We took the car this weekend on a bit of a tour with some friends who are "non car people", they commented that it was loud (and also complained of an oil smell).
our wagon have a 3" turbo back with one muffler... shes a little drony around 70 but other then that it sounds great... even my mom likes it!
![[Image: img1231808006712-1.jpg]](http://i459.photobucket.com/albums/qq320/cannonballsdl/img1231808006712-1.jpg)
![[Image: img1231724701604-1-1.jpg]](http://i459.photobucket.com/albums/qq320/cannonballsdl/img1231724701604-1-1.jpg)
![[Image: img1231603208122.jpg]](http://i459.photobucket.com/albums/qq320/cannonballsdl/img1231603208122.jpg)
cannonballSDL
08-05-2009, 01:08 PM #19turbo's keep cars quiet our wagon have a 3" turbo back with one muffler... shes a little drony around 70 but other then that it sounds great... even my mom likes it!
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