Intake/Exhaust Modifications - PeachParts Mercedes-Benz Forum

RichardLSU · #1 09-08-2010, 01:16 PM

After reading through this forum for several hours today I've decided that instead of keep replacing the broken intake bracket which makes a horrible rattle sound over and over again I think I would just like to remove it all, buy a 240D oil separator and a cone filter to stick on the front of my turbo. If I could find a piece of angled tubing to separate the turbo from the filter that would be a bonus. Is it really that simple? I've got a K&N filter on my car right now but I've been scared from buying another one...

From what I understand removing the stock setup and replacing it with a cone filter will help the turbo spool faster? Also I've read that putting a free-flowing exhaust system will help it spool faster too. I was thinking about just taking off my old exhaust which is riddled with holes and having a muffler shop just fab up a 3" exhaust strait from the turbo out the back of the car.

Anyways, any input from anyone who's done this before??

MTUpower · #2 09-08-2010, 02:03 PM

Check the diesel performance section- I did many of those same things to my 84 wagon. You can find a proper paper cone filter instead of oiled cotton/gauze.

RichardLSU · #3 09-08-2010, 02:56 PM

Has it worked for you? I've been reading horror stories and plenty dismissing them...

tbomachines · #4 09-08-2010, 03:03 PM

Well the intake is already a true cold air intake. Much of the debate revolves around K&N filters (see thread that is active now) and it is generally agreed on this forum that the oil-fabric filters are not as effective as a good ol' paper filter as MTU said. Exhaust can decrease spool time marginally, but IIRC the biggest bottleneck on the exhaust side is the turbo itself, so straight piping it or widening the diameter won't do TOO much. If you're looking for more power, generally the best way to start is with fuel mods (ALDA removal, etc.). You'll find a lot of good reading in the diesel performance section at the top of the diesel board index page.

ConnClark · #5 09-08-2010, 03:33 PM

On a 300SD a performance muffler does help some because its not a straight through muffler. I threw a cherry bomb on my SD and boost did come up sooner.

Edit:
Richard,

I noticed you have an 85 SD. The intake on that is near optimal.

MTUpower · #6 09-08-2010, 04:00 PM

Quote:

Originally Posted by ConnClark

The intake on that is near optimal.

Removing the muffler helped my car and it's not really loud as some claim. Now the intake is mechanically near optimal, but it sure is ugly and those pesky rattles and rubber mounts just do not go together.

RichardLSU · #7 09-13-2010, 02:28 PM

Quote:

Originally Posted by ConnClark

On a 300SD a performance muffler does help some because its not a straight through muffler. I threw a cherry bomb on my SD and boost did come up sooner.

Edit:
Richard,

I noticed you have an 85 SD. The intake on that is near optimal.

I noticed the pipe coming out of the back of the turbo just heads strait down and out the back of the car. My exhaust is pitted and full of holes and needs replacing anyways, which is why I'm looking into having one made. Probably cheaper that way than trying to source, buy, ship a new one for my car.

Performance is not only the reason I want to change my intake setup. I've busted 3, yes, count them 3 intake housing brackets and I think having a small filter right off the turbo looks a hell of a lot better when I pop the hood. I like seeing that turbo sitting there

. I would find a nice stainless steel or aluminum housing, I hate the chrome, but this is all temporary for a few years until I start working on the super-turbo version of this engine. I'm collecting a nice pile of parts for when I have the time.

Diesel911 · #8 09-13-2010, 02:42 PM

This is what I did with washable Fram filter that unlike the K&N types needs no oil or special washing fluid. I got all the ABS Plumbing at the local Lowe's Home Improvement Store.
The filter is can be a little hard to find. I bought the only one they had at Walmart and the other I ordered on the internet. I have one on the Mercedes and other one on my Volvo Diesel.
Washable Air Filter and Intake Mod , With Larger Breather
Washable Air Filter and Intake Mod , With Larger Breather

In the below thread towards the end is a similar intake but it has a larger non-washable Paper element Fram Filter; if you think there is room for that.
Also in that thread is another thread I did testing the Hot Air Intake. In actual fact the only time hot air builds up under the Hood is when you idle. Ounce you start moving that temp drops quickly to nearly the outside temp; even in City traffic.
But, that is with no sort of Belly Pan under the Chassis.
any real benefit to a K+N filter