Last night I had a moment: why not twin-turbo the 606?
Besides giving ridiculous performance (highest on an otherwise-stock IDI Benz diesel), I think it is actually possible:

1. My 606.962 (turbo in '98-'99 W210) has the stock KKK mounted towards the front of the engine, by cylinder 2 or so. Its only connections to the engine are the exhaust manifold and the oil lines. The exhaust manifold is a single, long unit that takes from all six cylinders (this will become important in a moment).

2. The 606.912 (nonturbo in '96-'97 W210) and 606.910 (nonturbo in '95 W124) have not one exhaust manifold, but TWO. Each (smaller) manifold connects to three cylinders and there are two exhaust pipes exiting the engine bay (versus one in the turbo).

3. It seems possible to bolt one turbo on each of these smaller manifolds and run them through the existing intercooler plumbing (or if the motor was nonturbo to begin with, the intercooler could be installed and the intake manifold from a turbo could be used). The only other connections would be oil supplies to the turbos.

Turbo exhaust manifold (no, that's not my engine):


Nonturbo exhaust manifolds:


What do you guys think? Am I out of my mind? Obviously I'm not going to attempt this--to begin with, I'd have to buy a new car. Just tossing the idea around.

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99 E300 TD -- sold
01 540i 6 spd

Sexy idea.... intercooling plumbing would be a nightmare I would imagine...

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#dieselFLEET
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'97 E300
'99 E300

I was always thinking it would be sweet to install that exhaust manifold on a non-turbo NA OM606 and limit it's boost to say 6-7 lbs to prevent melting of internal compenets, just enough to give it a little boost out of the hole....

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#dieselFLEET
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'97 E300
'99 E300

If you don't do anything with the injection, you're not going to see more power.

Is there a turbo 603? The IP from that would probably work the best.

just put a VNT turbo in there..

Still won't help with the original injection system. Adapting the system from a turbo 606 would probably be a real headache; for one thing, you can't use a used IFI computer from a donor car.

Very true. The IP's on these 606s are electronically controlled...at least those in the W210 models. Throttle, cruise control, ALDA-like function, everything is electronic. Now, I know the W124 models have a mechanical throttle linkage, maybe if they have a mechanically-controlled IP as well it could be replaced with one from, say, a 3.5L 603.

Of course this is all entirely hypothetical....

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99 E300 TD -- sold
01 540i 6 spd

There's nothing stopping you from putting a mechanically-controlled IP from a 603 on a 606, however doing so would certainly confuse the IFI computer. I doubt that your flaps would work properly.

I think you'd get much better results simply by having the ECU and engine re-mapped to a higher output.

Mind you, these chaps seem to have the same idea, but with only the one turbo:

http://www.rodionenkin.de/mbdt/w201606.htm

The Fin's can already get 500hp out of that engine with a large single turbo. Twin turbo's are kind of obsolete these days since variable turbo's started to show up. I remember Volvo used to do this on a lot of there marine engines; for people that wanted gas engine kick out of the 1,000hp diesel's installed in their Sunseeker sport yachts.

While it would be cool, their is no performance gain to speak of.

I beleive the trick to getting a lot of power out of the 606 is pretty much the same as the 603. First you need to get a 603's injection pump and send it off to be tuned. After that install a massive intercooler, and massive turbo. Then get it all to work.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

A very Benzworld-worthy thread...............

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

A good single turbo will have just as good as, if not better, performance than a parallel twin-turbo setup. Think about it. The friction and pumping losses of a single moving shaft vs two.

Yeah, but you could implement a big/little sytem, and really get some torque down low.