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  #1  
Old 06-11-2009, 01:25 PM
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1996 e300d performance mods

Does anyone know what can be done to a 1996 e300d to increase the power? This is a non turbo car.

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Old 06-11-2009, 03:42 PM
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Hi, welcome to the forum. Hate to be the bearer of bad news but there's virtually nothing you can do to a NA car for more performance... Now, in theory, you can add a turbo but there's a whole host of supporting mods that need to be made and especially on this electronically controlled injection pump, it's going to be complicated.

The durability of the engine will also be suspect since the turbo engines have several internal differences to make them more robust.
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Old 06-12-2009, 12:25 AM
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Ok thanks! Just thought i would ask if there was anything out there that can be done.
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Old 07-26-2009, 01:35 AM
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mechanical IP to electronic rail

I have a '95 E300D with a mech IP. I have embedded systems, some robotics experience and a small machine shop and was wondering what it might take to convert the mech to an electronic rail system?

Why you might ask? Just another challenge.
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Old 07-27-2009, 03:30 PM
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In theory, conversion to a common rail injection system is possible, given a talented person such as yourself, equipment such as you have, and wads of money. The results, however, would not justify the expenditure unless you simply wanted to use it as a learning experience. You might be able to improve the fuel economy beyond the current 30-ish but the NA block, as KarTek says, will not support much more power. To the list of expenses you would also have to add the value of the car as it is now, since the resale value of the car would almost certainly be negatively impacted.

Since you have a W124 chassis, it would be more practical and perhaps just as much fun to retrofit a 603 engine, since it is turbocharged and comes in two flavors, the "regular" 3 liter version and the rod-bending 3.5 liter version that was in the S-class cars for a couple of years. Since the W124 chassis was originally built for the OM603 engine, it should not take much work to stuff one in a newer version of the 124 chassis.

It would be a challenging project to rebuild the engine with the updated (supposedly) non-bending rods, an intercooler, and an aftermarket boost controller. You could then look into modifying the injection system. However, because Mercedes uses indirect injection, you still might find that the results were limited. Whether an existing head could be machined to accept direct injection is beyond my limited knowledge of diesel systems.

I believe that some people have tried to put an OM606 turbo engine in a W124 chassis. The problem there is the electronics. It would be interesting to see if the mechanical IP from the engine in your '95 could be fitted to the '98-99 turbo engine. If you could get rid of the electronics, the project would be a lot easier.

Jeremy

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