Lightening is static electricity. DC current can do work whereas static lacks the ability to do real work. Sure, it can blow a tree to pieces, but that's about it.

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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
http://i959.photobucket.com/albums/a...0/sideview.png

HUH? Did someone say something?

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daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
No longer selling Cluster Needles Paint
No longer selling New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

Like I alluded to, there are alternate definitions to most scientific concepts/labels. I have never read that to qualify as DC, we have to invent some device which converts that electricity to mechanical work. But that doesn't mean such a definition doesn't exist. But it is odd to criticize someone for holding a belief which matches the most common definition of a scientific concept.

As an aside, from a thermodynamics perspective, electric current of any type is a form of work. Work is any energy transfer mode which occurs without entropy transfer. There is no entropy transfer with electric current, so odd as it may sound, a thermodynamicist would say that static electricity is a form of "real work."

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

Hey ~ YOU ! GET OFFA MY LAWN ! .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Just so ~ you do understand that inserting exhaust gases into the intake screen in any Diesel engine increases particulate emissions , right ? .

Not a whole helluva lot but as I've said ; two of my M-B Diesels have smoke issues and both run better with the EGR disabled .

I took SWMBO out on errands and lunch to - day in the Euro spec. 84/85 (that's how it's titled) turbo TD and once again marveled at the *instant* throttle response and amazing power it has , all with no discernible smoke no matter how hard I run it .

I'm enjoying all the information , thoughts and ideas here .

BTW : I know bupkis about lightning except it'll shock the living crap out of you when you're a kid leaning against a wet tree in a serious down pour and lightning hits the lake surface 50' out.....

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

I prefer to think of DC current as a one way movement of Holes....
more fun to visualize.... and this is not a joke...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

I guess I don't see how egr increases particulate emissions. I would like to hear an explanation of that.

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First let me remind you that no one said EGR's reduce particulate emissions , they only serve to reduce NOx emissions and do so at the cost of more fuel burned and lower power .

I'm no Engineer nor a good writer so I'm sure to mangle this but dumping soot into the intake stream is of course going to increase the amount of soot coming out the exhaust....

So far I've never encountered an engine that didn't gain more power and improved fuel economy from disabling the EGR valve .

I applaud you for keeping your working in Los Angeles , I don't need a race car but I do like to motorvate in a timely fashion and right now , my 300CD isn't doing that as well as my much heavier 300TD so the EGR valve remains disabled until it runs at least as well as it did in 1984 , then I'll consider re connecting it .

I have no opposition to having an EGR valve that opens under load when the engine is spinning right along as then it doesn't much affect power .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Speaking of holes, I thought I would chime in again. Ha ha. Self-deprecation is one of my only talents.

In discussing the photovoltaic effect, the movement of holes in doped silicon is a helpful construct. I have never considered the concept with normal current though a wire, but will give it a try to see if I can make sense of it thinking of it that way. Thanks for the suggestion.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

Same here, what a pain on mountain roads. They go flying by on the flats then get in my way on the grades. Same in my F-350 but they do tend to move out of my way in that one.

Is it true that 240D/Auto owners keep binoculars on the passenger seat to watch for a gap before pulling out into traffic?

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Brian
87 300Dturbo 180K #14 head still running R-12 SOLD 12/2017
02 F350 Powerstroke 180K
05 Chevy Express 1 ton w/Royal Utility box 120K
08 Infiniti FX-35 40K
15 Golf Sportwagen TDI 35K
10 Sprinter 3500 chassis with a Class A Winnebago on it. 56K

True, but you did say that egr increases particulate emissions, which I doubt.

Feeding exhaust into the intake must increase the concentration of soot in the exhaust, but it also should decrease the volume of exhaust by the amount of recirculated gas. So the total amount of soot should remain the same, absent any overfueling. Presuming the pump is set up for egr it should not increase absolute particulate emissions per mile or gallon of fuel burned.

I'm sure some combustion engineer will correct me on that if needed.

I really don't care much what other people do with their egr. It is interesting though how much attention is paid to vw running nox out the tailpipe; I'm guessing blocking the egr on an om617 sends thousands of times more nox out than a "cheaty" vw 2.0L. Personally I just want to breathe clean air and am trying to be part of the solution, within the context of what my vehicle is set up from the factory to do.

I think someone should point out that a properly functioning egr system does not affect full load power at all. Recirculation occurs at moderate loads when there is excess oxygen relative to amount of fuel being burned. The valve should close completely under full load. So saying your car has more power with it blocked off doesn't make much sense, unless the valve was not working properly to begin with. When you need power, egr shuts down. When you don't need power, the motor pollutes less. Win-win.

Rebuilding my turbo, head and injectors helped my power a bit. Intake valve seat was shot in #4. Certainly the turbo is a tad snappier now. Maybe try rebuilding the turbo. It is like $250 at a shop. Rebuilt injectors are also cheap. Check pump timing, Yada yada.

Enjoy,
Karl



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"Don : was your Pop's '53 an early (split rear window,"zwitter") or late (oval rear window) model ?"
He was my uncle, and it was a "splitter". He was a musician/music teacher who loved foreign cars & owned a music store in Pasadena, married mom's sister. Quite a talented guy. He later replaced the 53 with a newer Bug, that had the "big" rear window and a 40H.P. engine. Dad and his brothers were more typical in their devotion to the big 3 American car makers and at that time, thought it was dumb to buy a small, underpowered European or English car.

My best friend, Kim Browning, had a step-dad who bought a new 1954 Porsche, most of our neighbors couldn't believe anyone would buy a car that only had 2 seats!

Back to the topic: my 1980 240D shows 236,000 miles, probably closer to 300,000 as the odometer only operates below 50*F. Despite the high miles, it has good power and doesn't show any visible smoke day or night. SWMBO did complain that it had a diesel "stink" when she followed me home from my indy. She had to put her S class on recirculate + charcoal filters to make it all OK. (deserved a mechanic's shoulder shrug, but I know better) Don

I compared some of the numbers for cheating VW's to EPA testing of a 220D back in the 70's. NOx quantities were pretty similar, so an EGR-free W123 is probably putting out roughly the same NOx as a cheating VW.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.

Interesting. Would that be in molecules/grams per mile driven, per unit of power output, or per unit of fuel burned?

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The other side of that comment suggests that a 220d equipped with egr should put out less nox than a chee-w.

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