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  #16  
Old 01-27-2010, 09:04 PM
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Quote:
Originally Posted by Scott98 View Post
Once the engine has warmed up, I drive my 240 with the pedal on the floor.

Scott
x2!!! Particularly with the auto; I'm always getting ready for the next hill.
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  #17  
Old 01-27-2010, 09:18 PM
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Having the pedal on the floor on a diesel engine is not like having it on the floor of a gasser..
Your fuel application and engine speed are closely connected mechanically through the injection pump.
That is one reason our engines are so economical. You can not get the fuel to air ratio too far away from the right ratio. You can affect the rpm at which you shift the manual transmission of course... and somewhere in the Factory Shop manual it spells out the most economical speeds to shift the car at.... it will also spell out exactly what those little marks on the speedo are for.
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  #18  
Old 01-27-2010, 09:22 PM
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Quote:
Originally Posted by layback40 View Post
Take a look around at the diesels that get to very high mileages, they are not driven like they were stolen. The boy racers generally end up wrapped around a tree long before their motors are worn out.
My old 300d mainly did long trips, steady at about 65mph. It did 800k miles before I retired it. The motor was never pulled down in that time. In the mid 80's the diesel w123 was the most common taxi in the world, you dont see taxis driven like they are doing a lap at Daytona! The main thing for "cleaning the gunk out" is to make sure the motor runs for much of its life at the correct operating temp. A motor that is only used for short runs and so run cold for most of its life generally has a short life.
Agreed.

Furthermore, there is absolutely no need and no justification for running the engine to redline "every week or so".

Running it at maximum power at 2500-3500 rpm on an upgrade or a fourth gear accel accomplishes the desired result with far less stress on the engine components.

There is no argument to run these engines to redline unless you must have all available horsepower. If that's happening often, you are driving the wrong vehicle.
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  #19  
Old 01-27-2010, 09:26 PM
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Quote:
Originally Posted by Brian Carlton View Post

There is no argument to run these engines to redline unless you must have all available horsepower. If that's happening often, you are driving the wrong vehicle.
I must. It does. I am.

My 240D spends a lot of time floored. Fortunately, I plan on it becoming the tranny donor for my 300D's manual conversion in the near future. I feel kind of bad about killing a car that I just took on a five thousand mile road trip, but the body is pretty badly rusted and the interior is shot.
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  #20  
Old 01-27-2010, 10:04 PM
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Properly maintained these cars arent exactly slow. (not sure on the automatics ) As far as hurting the engine if its stock and hasent been tampered with the governor will regulate you on acceleration . It will reach a flat spot where it wont give you anymore. If you need it use it especially merging into traffic . Just for normal driving you will hear the engine and it tells you when to shift . Same as gas just takes practice. You dont need to run the hell out of it especially around town.

Now where you can kill it is if you doing high speed driving and accidentally shift to 2nd or 1st The governor cant regulate the rpms and your on your own. This goes for going down steep grades as well .

Maintenance is the key to all of this. Mine cruises happily at 65 - 70 all day long. Happily not quietly !
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  #21  
Old 01-28-2010, 03:06 AM
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My friend who is an aspiring diesel automotive engineer (he got me into diesels) says you don't want to rev the engine high when it's cold. He also says you also don't want to overrev a diesel engine. Bad stuff happens.
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  #22  
Old 01-28-2010, 03:31 AM
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dantheman,
Your friend is a smart man! revving a diesel too fast can do nasty things, more so than for a gasser. it up to you how long you want it to last. If people want to be boy racers, best they get a 6.9 V8, they go like #^&# !!
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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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  #23  
Old 01-28-2010, 04:48 PM
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Quote:
Originally Posted by okyoureabeast View Post

After I fixed my car, I was driving it pretty hard. I like torquey pull
Or lack thereof
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  #24  
Old 01-28-2010, 06:21 PM
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Quote:
Originally Posted by Ian White View Post
Or lack thereof


Then I discovered my leaky oil cooler lines. It was fun to push my car over 100 mph
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Quote:
Originally Posted by Yak View Post
Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
1984 380SL
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  #25  
Old 01-28-2010, 06:47 PM
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Quote:
Originally Posted by layback40 View Post
Take a look around at the diesels that get to very high mileages, they are not driven like they were stolen. The boy racers generally end up wrapped around a tree long before their motors are worn out.
My old 300d mainly did long trips, steady at about 65mph. It did 800k miles before I retired it. The motor was never pulled down in that time. In the mid 80's the diesel w123 was the most common taxi in the world, you dont see taxis driven like they are doing a lap at Daytona! The main thing for "cleaning the gunk out" is to make sure the motor runs for much of its life at the correct operating temp. A motor that is only used for short runs and so run cold for most of its life generally has a short life.
I disagree on the taxi aspect. In Boston, at least, they pretty much haul ass. If they're not flooring it, they are damn close. And that's in the CV, they'd almost certainly be flooring a 240.
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  #26  
Old 01-28-2010, 08:38 PM
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JE,
You must be lucky in having taxi drivers that want to get you to you destination in a hurry!
There is nothing more frustrating than being behind a cab that is going at a glacial pace. Sounds like we need some Boston taxi drivers in Australia!! Most down here are from the Sub-Continent, and with due respect, I often feel sorry for these guys, they often appear lost and all these freeways!!
Back more on the topic though, we get a lot of spares here that have come via the Middle East, many of us have parts that most likely were originally intended for Beirut taxi's. The local Mercedes Dealers say that these indi's are bringing in a container at a time of new & second hand parts. They sell them here cheaper than MB can land them in Australia. They have all the usual MB markings.
I just hope that there is no C4 or similar in anything or I will have the fastest 300d on the planet (for a short time).
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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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  #27  
Old 01-29-2010, 10:09 AM
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I vary rarely use a taxi, but when I have on the two occasions - once in Korea, and once in Poland . . . they were both MB's, and we were charged by the "Mi" or "Km" actually!
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  #28  
Old 01-30-2010, 10:06 PM
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Quote:
Originally Posted by soothappens View Post
Properly maintained these cars arent exactly slow. (not sure on the automatics )
i have an auto and while its not a speed demon its no slug either... i have no issues merging onto I-10 and i would not say i baby it or drive it like i stole it... somewhere in between
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