| Welcome to Mercedes-190.co.uk We are the Mercedes 190 owners forum, the place to be for all owners and fans of the Mercedes 190E, 190 and 190D cars. Including Cosworth (2.3 16v and 2.5 16v), EVO 1 and EVO 2 models. Modified and concourse, track cars and daily drivers, all are welcome. This free UK based forum was started back in November 2005 to serve the Mercedes 190 W201 community and now has over 9000 members from all around the world and 600,000 + posts. The members welcome you and encourage you to stay a while and have a look around. We offer you friendly chat and access to some very useful information as well as tutorials with photos and videos for many common repair and maintenance jobs. Whatever your needs there is a good chance you will be able to find what your looking for. Such as our Mercedes 190 buyers guide Sign up to gain access to all areas including for sale / classified areas and country wide meetings and events. Many forum features and sections are only available once you sign up. Join our forum at mercedes-190.co.uk! If you're already a member please log in to your account: **New members signing up** please check your junk mail for the email authorization email otherwise we cannot verify your new account. I have noticed a lot of unauthorized accounts in the system. Regards Admin |
| 3 inch into 2inch | |
|---|---|
| Tweet Topic Started: Fri Mar 18, 2011 12:30 am (1,095 Views) | |
| HRH-squidlips-III | Fri Mar 18, 2011 12:30 am Post #1 |
|
Part of things
![]() ![]() ![]() ![]()
|
hi guys, got a mate with a 2 inch remus backbox exhaust i can have, just woundering what would performance and sound be like compared to just leaving it standard i,ve got a 2.5 16v with i think factory exhaust thanks in advance dan |
![]() |
|
| stwat | Fri Mar 18, 2011 1:38 am Post #2 |
![]()
|
Performance may well be restricted if you go down from 3" to 2". The factory backbox is a very good one and is stainless steel so I would see a change to a remus with smaller tubing as a downgrade. |
![]() |
|
| gibpetrolhead | Fri Mar 18, 2011 8:41 am Post #3 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
Didn't know it was stainless Stu.
|
![]() |
|
| Nathan | Fri Mar 18, 2011 9:11 am Post #4 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
I'm quite sure the factory backbox isn't stainless steel. Anyway, wait until you find a correct Remus backbox. Doubt it will add much if anything performance wise, defently won't loose you any. It will sound epic though. |
![]() |
|
| iggy | Fri Mar 18, 2011 8:31 pm Post #5 |
|
More than part of things
![]() ![]() ![]() ![]() ![]()
|
i would expect youd need a complete free flowing exhaust system not just a back box, |
![]() |
|
| alogaparaloga | Fri Mar 18, 2011 8:47 pm Post #6 |
|
crazy mind
![]() ![]() ![]() ![]() ![]()
|
remus or whatever the make, is a small pipe diameter that will act as a restrictor on a 2.3 or 2.5 16valve. the minimum diameter pipe you can have in your car should be same as the collector after the downpipes and that should be around 2.25 and 2.5 inch. anything less and you are looking for some long term trouble as this is possible to increase exhaust system temperatures and will also reduce the engine performance. |
![]() |
|
| stwat | Fri Mar 18, 2011 8:58 pm Post #7 |
![]()
|
The box is stainless steel, sadly the pipes or the rest of the system aren't. The two original ones I had when I had my 2.3 valver were anyway. Edited by stwat, Fri Mar 18, 2011 9:02 pm.
|
![]() |
|
| Nathan | Fri Mar 18, 2011 10:16 pm Post #8 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
Like I said before, it depends on the type of Remus box you get. Like any part, you need to get the correct one for your model of 190. My Remus backbox is made for the 2.5-16. The rear pipe is the same diameter as oem and the tail pipes are larger than oem. The backbox isn't restrictive in any way. |
![]() |
|
| Nathan | Fri Mar 18, 2011 10:19 pm Post #9 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
Intresting Stu, can you remember the make? |
![]() |
|
| stwat | Fri Mar 18, 2011 10:21 pm Post #10 |
![]()
|
Not sure who made them but they had the MB star on and the new one I fitted had both the star and an MB sticker. The old one is out in the yard i'l take a pic when I get a chance. |
![]() |
|
| HRH-squidlips-III | Fri Mar 18, 2011 10:27 pm Post #11 |
|
Part of things
![]() ![]() ![]() ![]()
|
thanks for the advice guys much appericated the inlet pipe on the back box is 2" so i suppose this is to much of a difference not willing to sacrifice performance for a better sound from your experience nathan has adding the remus only bettered the sound (if so how much) or performance also dan |
![]() |
|
| Nathan | Fri Mar 18, 2011 10:35 pm Post #12 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
Hi Dan, it's hard to say if the backbox did anything performance wise as I fitted it at the same time as a head refresh. Sound wise is very nice. I will try to get a video up asap. |
![]() |
|
| stwat | Fri Mar 18, 2011 11:03 pm Post #13 |
![]()
|
The original back box is made by Eberspacher. I did take some pics but they didn't turn out any good unfortunately. The box is definitely stainless but painted black and the pipes are mild which is a stupid design as it's always the pipes that rust through, as on my old one. |
![]() |
|
| alogaparaloga | Fri Mar 18, 2011 11:03 pm Post #14 |
|
crazy mind
![]() ![]() ![]() ![]() ![]()
|
Nathan, you did not understand my point mate. You have a back box which has a single 2" pipe. and you put it on a car that originally has a bigger size pipe. So you apply a flow restriction. I think that it's clear that this is a downgrade. On top of that, 2" exhaust systems are used on 8 valve models from mercedes as standard. I don't think that your remus box is 2" OD single inlet and suits any of the 16 valve engines for the 190. |
![]() |
|
| Nathan | Fri Mar 18, 2011 11:34 pm Post #15 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
I have highlighted some bits to help you.
|
![]() |
|
| alogaparaloga | Fri Mar 18, 2011 11:42 pm Post #16 |
|
crazy mind
![]() ![]() ![]() ![]() ![]()
|
I Have seen what you typed and I totally understand that your back box was designed for a 16V . My question though is 1) Is the OEM size for the 16V 2" ???? (I don't think so) 2) Is the back box that Dan has/will put on his valver, same as yours??? |
![]() |
|
| Nathan | Fri Mar 18, 2011 11:48 pm Post #17 |
![]()
Nordschleife Taxi
![]() ![]() ![]() ![]() ![]() ![]()
|
No and no. Dan has been offered a Remus backbox for (I guess) a 1.8/2.0 190. I'm saying Dan should look out for a 2.5-16 Remus backbox like mine. |
![]() |
|
| gibpetrolhead | Sat Mar 19, 2011 12:04 am Post #18 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
How does that work from a manufacturing processes point of view welding mild steel to stainless?. |
![]() |
|
| alogaparaloga | Sat Mar 19, 2011 12:08 am Post #19 |
|
crazy mind
![]() ![]() ![]() ![]() ![]()
|
Very very easy thing to be done Usually mig welded. and mild to 3XX series stainless is welded by using 309LSi wire. Also manufacturing lines have better access to special wires for mig etc and quite advanced welding methods. |
![]() |
|
| stwat | Sat Mar 19, 2011 12:17 am Post #20 |
![]()
|
Yes very easy to do. It is not recommended on any parts that will take any stresses as the breaking points for both metals are very different but perfectly fine for parts such as exhaust systems. But bloody stupid in my opinion. Why bother to make the box out of stainless but then make the tubing from mild which will rust and fail?
Edited by stwat, Sat Mar 19, 2011 12:24 am.
|
![]() |
|
| gibpetrolhead | Sat Mar 19, 2011 12:24 am Post #21 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
Yes its sounds quite dumb, I think the reason was the water sat in the back box rather than the pipe and therefore its stainless.
|
![]() |
|
| stwat | Sat Mar 19, 2011 12:28 am Post #22 |
![]()
|
Yes that makes sense. Still a shame they weren't full stainless but then stainless is't exactly cheap. The back box on mine lasted 22 years until the joint to it sprang a leak!! So can't really complain with that to be honest! |
![]() |
|
| gibpetrolhead | Sat Mar 19, 2011 12:31 am Post #23 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
You'll not find any exhaust lasting 22 years these day's.
|
![]() |
|
| stwat | Sat Mar 19, 2011 12:34 am Post #24 |
![]()
|
Certainly not! They seem designed to fail not long after the warranty runs out these days Every merc I have ever owned seemed to have it's original exhaust system still in place. I wonder how long they last on newer mercs from the mid 90's onwards? |
![]() |
|
| cossie connoisseur | Sat Mar 19, 2011 9:50 am Post #25 |
|
there can be only one ;-)
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
the stainless isnt welded on the mb exhaust systems at least not the couple ive seen, they are (i cant remember the exact term) seamed by rolling. only the mild steal bits are welded |
![]() |
|
| eric78 | Sat Mar 19, 2011 12:32 pm Post #26 |
|
Part of things
![]() ![]() ![]() ![]()
|
In welding class at technical college we were told that welding stainless to mild steel was a no no but the engineering department at work do it all the time & it seems to work fine. |
![]() |
|
| cossie connoisseur | Sat Mar 19, 2011 12:59 pm Post #27 |
|
there can be only one ;-)
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
dunno if mb changed the manufacturer but like with many mb parts now the new ones are not as good quality as the old or old new stock around...sometimes worth refurbing the old part and re using it! |
![]() |
|
| gibpetrolhead | Sat Mar 19, 2011 5:12 pm Post #28 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
This is what I was told when I learnt to weld, that it was a no no. But I don't think that it can take large stress loads.
|
![]() |
|
| cossie connoisseur | Sat Mar 19, 2011 5:24 pm Post #29 |
|
there can be only one ;-)
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
stainless to mild steel Use 309L wire with Argon + 2.5% CO2 taken from a few forums so can be done |
![]() |
|
| gibpetrolhead | Sat Mar 19, 2011 5:28 pm Post #30 |
![]()
Racing line
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
The technology must be in the type of wire used. |
![]() |
|
| cossie connoisseur | Sat Mar 19, 2011 5:30 pm Post #31 |
|
there can be only one ;-)
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
|
yeah stainless wire not mild steel wire, makes all the difference apparently....and low co2 level
|
![]() |
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
![]() ZetaBoards gives you all the tools to create a successful discussion community. Learn More · Register Now |
|
| « Previous Topic · Exhaust · Next Topic » |







![]](http://z2.ifrm.com/static/1/pip_r.png)






But I don't think that it can take large stress loads.

9:26 AM Jul 11