98mph. 1985 300D, (dirty plugged filters + previous owner lack of maintenance)
Normally I drive pretty frugal but today on the interstate on a flat road I opened it up. Just wanted to see what it would do.
98mph at 4200 rpm.The previous owner had mentioned that he never replaced the injectors in the 7 years that he owned. I m betting that the injectors are factory new. Probably carboned up with cones blocked and out of spec on pop pressure. Does any forum member rebuild or exchange injectors? . |
I believe Greazzer does.
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Something is a little off. You should be getting about 10 mph more on top end. In addition to injectors it's a good idea to check your boost under load to see if it's in spec, and check the accelerator linkage to make sure it's getting to the max fuel position when you floor it.
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i have stuff to rebuild injectors also .
i put monarch tips in the last ones i did . you can look at the top part of the injector and its pretty easy to tell if they have ever been taken apart . |
+2 for greazzer
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Also, C Sean Watts does a great job on injectors. I have purchased rebuilt injectors from him with Monark tips for both of my vehicles, and they are great.
Kurt |
Thanks to those who responded. It runs now and doesn't leak a drop of diesel. I want to be sure that it is this condition once I change the injectors.
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Call me
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Many other issues are more likely. Your car should top out between 108 - 120 MPH, depending on many variables. . |
Hi,
Can you give me an idea? air or fuel filters? the pre filter looks clear. The PO admitted that he never changed the injectors, before that it was owned by one other guy. I have a new set of filters on order from you guys and am going change them first. The air filter in it is quite dark. I have taken the snorkel off the turbo, it turns but doesn't truly spin to the touch. Thanks It starts, doesn't smoke. Seems to get about 30 mpg. I figure that with the injectors being over 7 years old, maybe 27 years old, they could well be part of the problem. Not that I need a car that goes that fast but just wanting the most efficiency as possible. Quote:
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I should add that my fuel comes from my bulk tank. It is 20% bio diesel, I get it from the local fuel supplier who supplies a lot of commercial accounts.
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Use the force....
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Biodiesel cuts the power output a bit, at least that is what I experienced on B20, not a lot, but it certainly does a bit.
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Answer #1
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Biodiesel has a lower BTU per gallon compared to DIESEL. You can spike your tank with 4oz - 16oz of 2 stroke oil for more power. https://docs.google.com/document/d/1QkAv-HFaLqpK_5wKCln6DODkfw_DkjBHVYZXm0nUtEw/edit?hl=en_US&authkey=CJXuhs0I physics of turbo question http://www.peachparts.com/shopforum/diesel-discussion/31462-physics-turbo-question.html#post792013 Exhaust leak between engine and Turbo http://www.peachparts.com/shopforum/mercedes-parts-reference-library/176625-exhaust-leak-between-engine-turbo-om617.html 87 300SDL exhaust flex coupling- where to buy? http://www.peachparts.com/shopforum/diesel-discussion/140926-87-300sdl-exhaust-flex-coupling-where-buy.html Turbo Cartridge Replacement http://www.peachparts.com/shopforum/diesel-discussion/135489-turbo-cartridge-replacement.html Turbo Rebuild http://www.peachparts.com/shopforum/diesel-discussion/17299-turbo-rebuild.html Rebuilding Turbo http://www.peachparts.com/shopforum/diesel-discussion/111519-rebuilding-turbo.html Need help: Garrett turbo rebuild on OM617 1982 300SD http://www.peachparts.com/shopforum/diesel-discussion/167490-need-help-garrett-turbo-rebuild-om617-1982-300sd.html Adjusting the Turbo Wastegate Tweaking the Mercedes 617 Turbo Diesel What causes low boost readings ? http://www.peachparts.com/shopforum/diesel-discussion/276173-what-causes-low-boost-readings.html Turbocharger Wastegate Adjustment: http://www.peachparts.com/shopforum/diesel-discussion/114337-turbocharger-wastegate-adjustment.html The Garrett/AiResearch turbo is harder but not too complicated; it's just a pain to get to the adjustment. There's a good series of pictures here: Garrett Turbo Wastegate Adjustment - Benzworld.org - Mercedes-Benz Discussion Forum Turbo boost guage advice needed http://www.peachparts.com/shopforum/diesel-discussion/62672-turbo-boost-guage-advice-needed.html#post384697 . |
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