New exhaust filter

[old punk]

Guys,

Will fitting a sports exhaust and filter to my S280 24V make much differance, or will it just kill the fuel con, and sound like dog. Or should I have it chipped. Torque is great but need a little more HP.Am I deluded and should I leave well alone. Don't mind more noise if it delivers GO.

Rich

 

[wemorgan]

Re:exhaust and air filter
I've read of similar mods being done to Subaru Impreza's and I think generally they make minor performance gains ~10bhp I would imagine.

Personally I'd leave the car well alone and gradually save up for a bigger engine S-class when you can afford it.

 

[Howard]

A great big bus with a tiny engine is never going to be quick ...

Out it and get an S500 is probably best ...

'Sports' filters will screw up your MAS , so best leave well alone.

 

[lynall]

May sound very tinny in the cabin with non std exhaust, bet it would be pretty dear.

As said i have always read about 10ish hp gain.

You can get non oiled (k+n are oiled types and its the oil mist that screws up the maf), aftermarket filters but again the gain wont be noticable on such a large car, but try one and let us all know as i for one am curious.



Lynall

 

[old punk]

Spoke to a few specialists who state that with the use of sports cats and two seperate 1 3/4 tube 3 into 1 systems and back box, they estimate gains of about 15 - 20 HP should be achieved @ 10%.The air filter must as stated be a non oil type with multi lay foam construction to sift out the smallest particals. These should'nt confuse the mass censor. Gonna giv it a bash, trial and error style.

The guys have done this to a 95 SL 280 and said it sounds more sporty without being harsh, and still quiet at low revs. The car is a lot lighter so the power gain is more pronounced.

 

[lynall]

Keep us updated as i am interested.



Lynall

 

[old punk]

Custom made induction kit for S280

Checkout the pics. Fitted my own design induction kit. Welded some 75mm Alu tube and fitted silicone hoses with take off for air temp sensor. Tested the car and found some noticable improvment. Throttle responce is better and top end power is up. Fuel con about 17- 25 mpg. Plugs are fine and engine temp is as before mod. Taking my lad to the European Skate championships in Switzerland in a couple of weeks. I'll be able to check things better then.

Also vented rocker cover through filters to stop oil fumes fowling the throttle. A noticable amount of oil collected in the inlet man. Got to be better to collect oil and gas in a oil catch tank?

Ya can't break a merc well not one thats built right. The MAF sensor seems to be coping with detecting the increase in air flow, after all its what its there for. If ya don't try you will never know. Read and watch video of K & N's study on oiled air filters and supposed damage to MAF sensor, Interesting.

Later.

 

[stevesey]

Others have reported responsiveness improvements by moving the MAS closer the the throttle body than standard (specifically on early 202 kompressor engines). Looking at your pipework, have you done the reverse and moved the MAS further away than standard?

Any scope for some experimentation with MAS positions?

Also are you doing anything to shield the filter from hot (less dense) engine air? Cold (more dense) air is needed for max poweras it gets more Oxygen into the engine.

P.S. Like the pipework.

 

[grober]

Spoke to a few specialists who state that with the use of sports cats and two seperate 1 3/4 tube 3 into 1 systems and back box, they estimate gains of about 15 - 20 HP should be achieved @ 10%.The air filter must as stated be a non oil type with multi lay foam construction to sift out the smallest particals. These should'nt confuse the mass censor. Gonna giv it a bash, trial and error style.

The guys have done this to a 95 SL 280 and said it sounds more sporty without being harsh, and still quiet at low revs. The car is a lot lighter so the power gain is more pronounced.

Improving the exhaust manifold won't gain much power 15-20 hp as you have said but what you would find is a much more tractable car willing to pull smoothly from very low revs. For big power gains your only options is probably forced induction. Should be plenty room under the bonnet if you decide to go that way.
MKB tuning in Germany offer an engine capacity increase to 3.6 litres but would be expensive. Probably uses a different crank to stroke the engine a la AMG.
E 280 - M 104 2,8 l - 4V to 3,2 l - 4V
Increase in performance to 174 kW (243 HP) at 5850 rpm, 325 Nm at 3700 rpm
modification:
enlargement capacity to 3,2 l, incl. adaptation of ECU

MKB - Products

 

[Roger Jones]

I'm no technical expert, but when the experts tell me that the exhaust system is intimately integrated with the rest of the engine, then I listen to them and leave it alone.

If you're happy with the torque in a 280, you'd be over the moon with a 500 and even delightfully surprised with a 320. I agree with the suggestion above: change the car for a W140 with a bigger engine. In today's climate, you might find that the 280 is easy to sell, it's appeal enhanced on the grounds that large engines are out of favour (not that they consume that much more fuel). You might even find a W140 with a larger engine at a lower price than that at which you sell the 280.

 

[old punk]

Heat shield to filtter

Others have reported responsiveness improvements by moving the MAS closer the the throttle body than standard (specifically on early 202 kompressor engines). Looking at your pipework, have you done the reverse and moved the MAS further away than standard?

Any scope for some experimentation with MAS positions?

Also are you doing anything to shield the filter from hot (less dense) engine air? Cold (more dense) air is needed for max poweras it gets more Oxygen into the engine.

P.S. Like the pipework.

Yes I'm fabricating a heat shield. The MAS sensor is about were it was in original spec, not a lot of room over the rocker to fit the sensor on top. Work in progress guy's. Induction noise is very deep but not too loud. Exhaust next.

 

[lynall]

I like that a lot, very smart ,suggestions 2 little lugs tigged to side of pipe to support maf wiring and a half cup shaped heat shield fitted to the air filter exhaust side, maybe from 2mm alloy with some sort of insulation on the bottom.

Very cunning using a self cutting pipe outlet for the sensor housing.

Iirc the exhaust manifolds on the straight six are double skinned anyway.

Looks very professional if i was you i would be looking to develop these a little more and selling them on e bay.



Lynall