Question about 1984 Mercedes-Benz Mercedes Benz 300 Class

2 Answers

Looking for more Power from my 300CD Diesel engine

These days, everyone has heard about the amazing power that can be found from tweaking a diesel or adding extra components. I have a 1984 300CD and am very skilled at mechanical fixes and troubleshooting, but I still can't find any info on how to get more power out of my little turbo charged 5 cylinder diesel engine. Anyone ever try to ''trick'' their mini diesel engine?

Posted by on

  • 4 more comments 
  • loft404
    loft404 Jun 18, 2009

    EW, thanks, you're right I dont want to shorten the life of the engine or kill the MPG. I love the car and so far I have 290,000 miles on it and on highway it has no problem getting up to 100-110mph, though I dont like the rpms going past 4k. I guess most important for this car is the initial traffic light to traffic light need for low end torque...as well as those scary moments at a yield sign getting onto a fast and busy expressway...man do I wish I could just get up to traffic speed quickly without getting hit in the rear. Thanks for the info either way:)

  • loft404
    loft404 Jun 18, 2009

    HAha...yes I know. But if I had the money I'd go for one of those new Tesla Roadsters, I think they might even smoke the porsche....second choice is the MeanGreen Super biodiesel 65 Impala featured on Pimp my Ride a couple years ago...I think I'm in love with that car...

  • loft404
    loft404 Jun 18, 2009

    Aha, what about a diesel diaper ! I could pin one to the back of my car with lavender scent every time I accelerate. But seriously...no diesel, no electric...then tell me what you suggest is closest to a closed loop transportation device for those of us who can bicycle or take the train to work. I like the idea of a possible biodiesel hybrid...havent seen one yet, but that would be pretty clean...hydrogen sounds neat, but the production of all the parts and fuel seems to create it's own problems. Corn and soybeans seem smartest...or wind powered generation of electricity to charge electric vehicles...and to get around lead acid batteries, why aren't we seeing more use of capacitors instead, maybe not soley, but they can be used in support of the batteries and are much lighter. I like this topic, what have you heard that seems practical...or should we just throw that word out the window since it's infrastructure that is seeming to bee in the way?

  • yadayada
    yadayada May 11, 2010

    If u knew hat i know about electric cars u would not think the way u do, ignorance is truly bless. as far as diesel goes never would own one, and they pollute and smell, u should be behind your smog producing car in traffic.

  • yadayada
    yadayada May 11, 2010

    buy a Corvette.(:

  • yadayada
    yadayada May 11, 2010

    these tricks you here about involve changing the boost pressure to the engine from the turbo and changing the fuel flow through the injectors, this can be done because modern diesels are electroniclly controlled, your system is mechanical, so there is no way to change the engine programming. U can increse boost but u must also add more fuel, to do this would cost allot of money as the injection pump would have to be modified, the other side is that u will decrese the life span of the engine and the fuel comsumption will go up allot, there are no free lunches.

×

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 216 Answers

You turn up your ADLA,but you wont have any overboost protection,some guys remove this,or you can just clean it out,this gives the boost to the turbo.

Posted on Jun 23, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 80 Answers

Those old engines were made to last - compare the weight of the motor to one of similar capacity nowadays; the old ones were made of cast iron which is quite heavy, the newer ones like the C270CDi Mercedes motor weighs about 30-40%less due to aluminium parts. Longevity suffers, but you need less power to drive the engine, giving you more power to drive the car. Furthermore, the common rail injection used nowadays are a lot more flexible and powerful, due to the fact that the exact amount of diesel needed per cylinder stroke is injected, whereas the old system injected a fixed amount per stroke, whether you are doing 20mph or 80mph. So, it overfuels at low revs and underfuels at higher revs. To prevent it from burning too lean the engine has a rev limit, roughly where the mixture is running at "100%" effectivity. The newer motors use computers to make the decisions based on 83452 different inputs, the older ones just measured the diesel needed and the air supplied.

So, the sad news is that the only way to get the car to perform a lot better is to put in a new moter eg. C270CDi, or put in a REAL motor like a 350Chevy :-D but leave the 300D badge on and see the other guys $h@ their pants when this "diesel" smokes them!

Posted on Jun 18, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

Would it do harm to any part of the engine on my peugeot 407 hdi if i put 4,gallons of kerosine mixed with 4 gallons of diesel ?


No your car will run fine on Kerosine or heating oil. Slightly ******* though as there is duty on diesel fuel and none on kerosine or heating oil, but people do it. Don't use agricultural or marine red diesel as that has a dye in it and they can take your vehicle.

Mar 01, 2017 | Peugeot 407 Cars & Trucks

1 Answer

Where is the fuel pump relay on a 2.0 d suzuki vitara 2005


the NON_GRAND VITARA is not here in 2005 sorry.
2.0D (that mean diesel?)
vitara are sold all over planet earth. where are you????
nor are they the SAME,
and vast engine options, there is a J20 gas engine.
the diesel is unlike any gas cars. all parts. related.
2.0 L RF I4 (diesel)
eg;
he RF is a SOHC, two valves-per-cylinder engine. (older FE)
One of Mazda's more popular diesel engines, it was also available with a pressure wave supercharger called Comprex.

my guess is that sparse "D" means diesel.
this is usa forum we dont have the RF here.
actually there are 4 engines.
2.0 L RF/RFM I4 (diesel)
2.0 L RHW/RHZ I4 (diesel)

learn that all diesels have there own matching parts
and that means pumps ,relays EFI, etc. all parts fuel. for sure.

As of 2003, the smaller Suzuki Vitara has been withdrawn from the North American market.!!!!!!
no engine, no books. no car. strike 3.
why not post to a non usa car forum even a real suzuki forum.?

many suzuki use a large pink wire for the pump power
this can be a big clue, looking at the relays.

May 31, 2016 | Suzuki Cars & Trucks

2 Answers

Diesel. Reduce power lite turned on. Shut off engine and started back up - lite is off. Can it be driven?


Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Reduced Engine Power Light Wrench Showing Ford Powerstroke Diesel Forum

08 Reduced Engine Power

Regen Reduced Engine Power Light Ford Truck Enthusiasts Forums

Help reduced engine power light comes on

Dec 29, 2015 | 2008 Ford F-250 Super Duty

2 Answers

Purchased a 3500hd truck it has a diesel engine , question there is two batterys under hood what is the second battery for thanks


hi there
there are two batteries in all diesel's one batterie doesnot provide enough cranking power to start the truck they work together you still have 12v just as everyone else but it requires two to crank it over diesels are the hardest to start so they started doing this to help with that hope i answered your questions have a wonderful day

Aug 21, 2011 | Chevrolet C3500 Cars & Trucks

2 Answers

The engine makes a whirring sound when the air is on. The sound is quite brief, but when it is occurring there is power loss from the engine, the sound is very rythmic in its occurence.


The A/C compressor robs alot of Horse power from the engine...
Defrost will engage the compressor too...
The whirring may be the coolant fans engaging (drawing air accross the A/C Condenser ).

All of this falls into the ' normal opporation ' catagory , and should not warrant any worries.

Sep 25, 2010 | 2000 Ford Focus

1 Answer

When driving on freeway or accelerating engine loses power


Dear sir
sounds likea fuel delivery problem,
try your filters first as they are the chepest and eseyest to change then see how you go use ilimanation! if not then start looking into CO settings in the air meter.e.t.c.

Allways try the obvius simple and cheapest solutions first! theynearly allways pay off.

P.S. the CO settings only apply to the petrol version NOT DIESEL
If it is a Diesel engine vesion, old filters will almost certanly be the cause with out doubt!
Have a great day Bruce

Mar 10, 2010 | 1988 Chevrolet Astro Cargo

1 Answer

6.9 litre diesel losing power over last few days of driving, changed fuel filter no difference,cannot get enough speed up to allow trany to shift, bogging bad. and blowing blue when reved, not black....


Blue smoke is oil. With blue smoke and no power you should take the truck to a diesel reair shop to have it looked at. It could be that the valves need adjusting or it could be broken rings or a cracked piston, all of which are beyond the scope of online diagnosis. With a diagnosis in hand, you should pick up a copy of Haynes Diesel Engine Repair Manual, part #10330. It can help if you think you want to attempt the repairs yourself. Hope this helps.

Nov 18, 2009 | 1986 Ford F 250

1 Answer

1988 Honda crx si DIESEL swap


Forget about it with the money you will spend even if it is possible to swap, you could buy a newer car.

Aug 23, 2009 | 1989 Honda CRX

1 Answer

Diesel engine... more power.?


I have heard it, but I would advise using the fuel treatment from the auto parts store, that is guaranteed, and made for cleaning. The gas deal could possibly foul your sensors from the cumbustion ratio, and may cause other problems. I would suggest buying a can of "seafoam" I love it, you can put it in your oil, fuel, and intake, and you wouldn't believe the garbage that comes out of your exhaust and in your oil after about 3000 miles. I usually only put it in my oil, and gas, but never tried the intake. Seafoam is the way to go. Should find it at any parts or hardware store. its in a white steel can. Good luck

Mar 03, 2009 | 1992 Nissan Pathfinder

1 Answer

Land rover discovery 1 2.5 tdi


i experienced something very similar, we checked everything and found 2 issues . 1 ; on chassis in front of diesel tank is a sediment filter, ours was full of jelly and silt. and also on top of diesel tank through trunk outlet and return diesel pipes partly corroded and pulling air in. swapped sender and cleared silt pot and amazed by the power difference too. hope this helps ,Reuben

Jul 12, 2008 | 1994 Land Rover Discovery

Not finding what you are looking for?
Cars & Trucks Logo

283 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

yadayada
yadayada

Level 3 Expert

76070 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...