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  #1  
Old 10-02-2002, 04:04 PM
simon288
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Smile Know of any Diesel Performance Mechanic in S.F. Bay Area?

Hi All!

I've seen several posts here on how to increase the performance of the Diesel cars. I have a 1984 300D TurboDiesel and many of the posts have suggested tweaking with the Wastegate and ALDA controllers and removing the trap oxidizer to improve diesel performance.

I understand that some tweaks will shorten the diesel engine's life. Most independent MBZ mechanics won't touch the Wastegate or ALDA controllers. But since my car is 18 years old, I'm sure the Wastegate and ALDA controllers are out of adjustment and was wondering whether any of you know of a mechanic or do it yourselfer who lives in the San Francisco Bay Area and who can diagnose/tweak the Wastegate and ALDA controllers to improve performance a bit or at least put it back to factory specifications. I'm not too technically minded, mind you, so thats that purpose of my asking.

Any and all suggestions will be much appreciated.


Last edited by simon288; 10-02-2002 at 04:09 PM.
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  #2  
Old 07-03-2003, 10:12 PM
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Thought you might like to know about the 1985 300D I had and modified...Ran 8.5 second 0 to 60 when I could get the tyres to hook up.
What did I do? New parts as follows = pistons and sleeves... intake and exhaust valves.. guides...Engine gaskets...rod and main bearings....coolant pump...radiator....Plus, Delco Diesel of OKC bench set my injection pump ...Modifications = fully ported and flowed cylinder head, I opened up the intake ports to the gasket openings....exhaust was opened up and cleaned up.
Pistons = Second ring modified by Total Seal ...Machine shop told to work to tightest factory limits for piston to bore clearence and match each piston to each bore....Piston/rod assemblies micro balanced.... Engine assembled and checked for leakdown, all bores showed zero % leakdown, ie: too small to measure.....
Turbocharger rebuilt with new cartridge....
engine oil Shell Rotella 15W40 (Is there anything else? )
boost limiter disconected....Tee in pressure gauge to drivers seat..
run engine for 250 miles and change oil and inspect filter, no particals visable....Test run to set optimum power = boost at 3000 rpm 33 psi and rising...install adjustable waste gate bleed...
Set waste gate to 30 psi and increase underfueling untill engine tempurature starts to rise under sustained power (Did not have pyro' installed, should have done this, Doh !!!) result = Silly grin car !
Measured compressions on engine after about 1000 miles when in for valve check and adjust...all read 535 psi.
On standing start acceleration could hang the tail out for 100 yards or more !!! Sold car to doctor, he drove it like a sports car !
Estimated horse power around 200...torque, unknown. Would just have loved to put this on a chassis dynamometer ...
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Old 07-07-2003, 02:12 PM
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Simon, you should post over in the Diesel forum. Your car has no trap oxidizer (thankfully). Before we start increasing power, let's see how close your power is to factory first. Do some timed 0-60 runs with a stopwatch. Borrow a GPS if possible to verify that your speedometer is accurate as well. You should be getting to 60mph in about 13.5 seconds. If you're slower than that, the car isn't running as Mercedes intended it to. Next jobs are testing boost pressure, etc, to try and fix it.


"dkveuro", sheesh, it sounds like you built one crazy motor there. However with no pyro in the exhaust it's just a matter of time before the engine blows up with 30psi. Adding an intercooler (like Ridge's) on this engine would have probably made all that power safe, no worries of engine damage. Would have loved to seen this car in person...!
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Old 07-07-2003, 09:58 PM
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30 psi boost!

Well, the car ran for 5 years after I built it, so I must have got it close to right...
..........never build one without a pyro nowadays though....
The porting on the cylinder head is what made this thing quick, I also wish I could have put an intercooler in it too......
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Old 07-07-2003, 10:19 PM
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Stop it! you're tempting me to get crazy and do that to my OM603 engine...!



BTW, what ever happened to the car?
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  #6  
Old 11-09-2004, 11:48 PM
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Location: Livermore, CA USA
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Thumbs up Great Mechanic in Livermore

European Motorsport 3985 First St. Suite F Livermore

Owner -John Wessels

Phone : 925-373-3878

www.euromog.com

John is a great mechanic. I have had great luck with him. His rates are better than the RIP OFF dealerships around here AND he will take you right away. John has all the right tools, and knowledge. Great guy.

Checkout his Unimog too!!!

-Steve
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  #7  
Old 11-13-2004, 06:24 PM
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shop in bay

Check out Tony & Bob Independent Mercedes

1261 a California dr.
Burlingame Ca. 650-347-4bob,
650-348-tony, good people and know there stuff.

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