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#1
11-09-2009, 08:49 AM
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Diesel performance??
Sorry for such a newbe question but is there things I can do to my 1985 300D and 1986 300SDL to improve performance and or improve MPG?
Thank you! Hip
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 2006 Jetta TDI DSG 320k miles 1997 Ford F150 325k miles 4.2L V6 "Work Truck" 2008 Tundra 225k miles 5.7L 1982 240D.....sold 1984 300D...Totaled OUCH! 1985 300D Turbo 222k miles "Dos" sold to 79Mercy 1986 300SDL 98K miles "The Beater"....sold 1987 190E 2.3 16v Euro spec 115K miles....sold Last edited by Hip001; 11-09-2009 at 12:37 PM. 
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#2
11-10-2009, 05:09 PM
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For the most part, there isn't much. The 617 is a mechanical unit, as is the 603, I hear. So no such thing as plugging in a "hot" chip. There are many items to upgrade in concert to really make enough gain to notice. Buy something else to "hop up".
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83 SD 84 CD
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#3
11-10-2009, 07:41 PM
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U can remove the alda. Adjust the full load screw.
Do a search u will find info.
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2011 e320 cdi (132,000) current 2005 Jeep CRD diesel--2.8L (138,000 miles) wrecked, insurance took 1993 Mercedes benz 300D 2.5 Turbo Frybrid powered. (336,000 miles) wrecked and sold as parts car 1990 Mercedes benz 300D 2.5 Turbo (170,000 miles) wrecked and sold as parts car Check out my Frybrid Vegtable Oil Conversion at http://1990300dfrybridconversion.shutterfly.com/
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#4
11-10-2009, 08:28 PM
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^That can help, depending.
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83 SD 84 CD
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#5
11-17-2009, 04:31 AM
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Freeing up the exhaust helps slightly, noteworthy gains if you have a California car with a plugged Trap Oxidizer. (The football shaped thing under the turbo.)
If you really want to go crazy with them, you can source a Bosch "M" injection pump and have Myna over in Finland rework it. There are some crazy people making these engines roar, but it's not cheap. The pumps that are stock on engines here in the USA are Bosch "MW" pumps, and not nearly as adjustable.
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-Josh Testing the cheap Mercedes axiom, one bolt at a time...
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#6
11-22-2009, 10:15 AM
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The only performance gain you can really get is to transplant the drive train in a lighter chassis...
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1987 VW Jetta Mk II - Daily Driver 1992 W201 2.3 - sold 1985 W126 380se - sold 1985 W123 OM617.952 - sold 1981 W123 OM617.912 - sold 1986 W201 2.3 - sold 1979 W123 OM 617.912 - sold
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#7
12-30-2009, 10:07 AM
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there is gobs of things to do to them. this is a bad place to ask though. here is a far more knowledgable site http://www.superturbodiesel.com
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#8
01-14-2010, 08:31 PM
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The SuperTurboDiesel site above will have tons of information. However, you didn't explain what kind of power increase you're looking for. If you want to get 10-20% more power than stock, that is possible via tweaks and adjustments (mostly to the IP settings). If you want any more, it gets difficult and expensive real fast.
First you need to check the performance on both your cars to make sure the power output is equal to when it left the factory. The easiest way to do this is to check the 0-60 time with a stopwatch, after verifying the speedometer accuracy via GPS. You should be within 1 second of factory spec (the specs are available here in an Excel file). If your car is much slower than stock, something is wrong, start by fixing it and getting the performance back to stock. It's amazing how many cars out there are much slower than MB intended! BTW - pulling the ALDA off is not the solution. I sure am sick of hearing everyone claim that is the magic fix for everything, including world peace. 
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#9
01-29-2010, 08:55 AM
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I pulled my ALDA off,an saw God.He passed me in a s600.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran
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