djmeistro

what performance upgrades are there for a e300d 1997 mercedes?

lkchris

Any 2005-2007 E320CDI or E320 Bluetec is a considerable performance upgrade!

djmeistro

i mean upgrades to the actual car a 97 e300d not a new car itself

rsatmans

With the non turbo model it will be hard to gain huge performance from a diesel. You can try a chip from several places like kleeman or powerchip however many of us have choosen a cheaper alternative with good results from speedtuningusa however i believe you can only gain about 15 hp from the non turbo engine. You can also try a green performance filter some have had problems with k&n being over oiled causing problems with the maf. You should also run some diesel purge to clean out the system and a bottle powerservice diesel kleen will help even more for regular fill ups Just some ideas

djmeistro

thanks for the info... would modifying the air intake help any way?

rsatmans

The answer is basically no. Mercedes has a great intake system unlike many domestic cars and it's hard to improve on the design. With the air filter upgrade your looking at probably a +3hp at the crank it's mostly going to be placebo but it may give you better throttle response. Chip is probably going to be your best bet.

husk323

try an exhaust

240D 3.0T

Cut out the Cat, disable the EGR and disable the intake flap.

harkgar

Can I do these things without bringing on the check engine light?
Where are the EGR and intake flap located? Any photos?

240D 3.0T

The EGR is on the start of the metal intake. Remove the exhaust end from the exhaust manifold. Make a stainless steel disc or cover the hole on the exhaust end. Put an air filter on the end of the EGR tube.

This will fool the airflow sensor into thinking it's still working.

cdiken

That thing is just going to be a road turtle no matter what you do.

Save your money and put it toward a fun car, use the E300 for highway trips, etc where fuel economy matters.

That E300 is a purpose built machine. The purpose is a big, safe, fuel efficient car. It just isn't gonna go any faster.

harkgar

Thanks man.

Mr.Billyd

I have seen these pics before, where did this procedure go?? I want to know if these parts are available off the shelf

Bill

240D 3.0T

You can make the exhaust block yourself with some 1/16" tin and metal snips. The air filter can be found at most any place that sells lawn mower filters. I don't know the exact diameter of the tube, you'll have to measure it.

nate300d

What is the purpose of the intake flaps? They do not exist on my 1999 E300. I remember looking at a 220D and it has a type of throttle plate on the intake. I had never seen such a thing on a diesel.

240D 3.0T

On the old models, like that 220D, it controls the injection pump governor and should not be altered.

After 1976 the only time an intake flat is used is to increase intake vacuum to draw more exhaust gasses through the EGR valve.

GermanCarShow

Reviving a super old thread! I'm new to diesels and bought a 97 E300D and want to do this EGR delete. Does anyone know if there are other vacuum ports in the cross pipe or intake manifold that wouldn't (properly) work anymore if the flap preceding the EGR was removed/disabled?

Should I leave this flap functional since I'll be getting filtered fresh air in through the EGR?

Thanks