Here are a few shots of the "boost/turbo resonator" and how I've disabled it:


[NOTE: REMOVAL BASED UPON MERCEDES-POWERED GRAND CHEROKEE PLATFORM]

Unit removed from vehicle
-Quite easy, and a pain in the rear at the same time. The unit is secured by two small star-head bolts (I believe an 8-point 5/16 socket will suffice in their removal). After that, you need only to release the hose clamps. There's -just- enough room to squeeze this unit out under the bumper from the lower driver's side and you have this:


Casing screws and top cover removed
-There are 19 screws and fastening the top cover. Once removed, the lid pops right off. Inside, you can see the "muffler" tube.


Baffles in muffler tubing
-The baffles release charged air into the squared chambers. Altough I don't have a clear picture of it, the bottom of the tube wide open which allows the air to move in a circular fashion back into the main pipe section due to the low pressure vaccuum created.


Removing the muffler
-This is very easy and can be done by hand. Shown here I've used a screw driver to evenly pry the unit upward and outward.


Muffler tubing
-Shown here, the tube is made of two pieces, they fit together loosely so don't freak when they break apart. Note the latent oil, this amount is still present after installing the catch can.


Final Prep
-Here's the finished product, just shy of the case cover and screws.


[Not pictured: My ear-to-ear grin]

Boost lag has reduced DRASTICALLY. The Jeep is more prone to breaking traction from a no-stall launch and since the mod, can squeal 'em on a low-speed roll.

I don't have any data on MPG but have to surmise since the spool is much quicker, improved bottom-end torque will greatly enhance fuel economy. Boost pressure remains the same (about 22-24psi).

Turbo noise, changes. Its gets sharper on the bottom-end, and quickly fades into what my friends and I call "Supersonic" mode.

Its nearly impossible to describe the way this little three litre engine snaps your neck around.

Cheers!

 

Well done.

I removed the two resonators in my sold 1986 560 SEL too. They were simply chopped off in a muffler shop and two new stainless steel pipes welded on for a much straighter run. You can see the photo posted in the W126 section. The end result is a throatier sound on acceleration and may be a marginal improvement in performance.

 

harkgar, that resonator is on the intake side between the turbo and engine.

The only major downside is now you just have a big expansion chamber. The mod should only be temporary, a straight pipe wouldn't be difficult to fabricate.

 

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It is like this, in 320cdi, straight six cyl.

 

It suffices to say a hardpipe would suit as well. Having firsthand experience of the mod and structure of the resonator housing I prefer the method above as the charge air will benefit only at a marginal level when considering a hard pipe instead.

For a truly benefitial upgrade I would recommend converting to hardpipe throughout.

The mod above has the advantage of retaining a stock appearance and best of all, stability.

The piping runs very close to the serpentine belt and pulleys.

Using the box as above allows you to re-use factory mounts, thus eliminating any chance of foul play.

I did give some thought to fitting a pipe inside the box but as I mentioned, the benefit would be minimal in comparison.

 

I think we are talking about different things here. The resonators I referred to are the two "extra" mufflers located under the two rear passenger seats (one on each side), not on the intake side.

 

When I said "that" I was referring to the one being discussed in the topic.

 

Any chance of getting the pictures re-posted?

 

Is this in the intake side between turbo and intercooler? I've seen something like what is described and wondered what it was, but the pics don't work anymore. Anyone?

 

this one?

http://www.mbclub.co.uk/forums/engin...what-part.html