I tell y'all something I "know" as well. My F250 with the 7.3 IDI will jump off the line faster than some newer trucks. Whatever I have in the front of the truck quickly finds its way into the back seat. Granted the engine is over 2x the displacement as the OM617 but the truck also weighs 2x or more than the W126 chassis. My turbo lag is not bad, either. The Banks always feels like it is right there as soon as you touch the accelerator. Now, I can floor the 300SD and it just lethargically gets up to speed; from my observations of other OM617s, that is not normal.

I'm not looking to make 500HP out of this engine but I would like not to have to plan my turns to compensate for the 5 or so seconds I may or may not get some little bit of power to the wheels. I'm sure Benz Kid feels the same way.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge