Don't forget that the newer engines, such as the om606 are possessed of (perhaps possessed by is more accurate) a computer-controlled wastegate, so it will be difficult to bump the boost. I seem to recall that the VNT's do a little better job at lighter loads. I also seem to recall that all Mercedes turbodiesels (at least the ones we deal with; om60x.96x, om603.97x, om617.95x, om352a) have oil jets for the pistons. -j.
-------------- Original message ---------------------- From: "Werner Fehlauer" <[EMAIL PROTECTED]> > I would hope that no one would try to simply bolt on the turbo parts of a > newer engine to the block of an older one, and expect it to live very long. > That extra mechanical loading of bearings and rods may turn the thing into > an I.E.D., and the additional thermo load will surely do bad things for > longevity, also. > As has been pointed out before, one big reason to limit turbo boost is to > keep from melting out the tops of the pistons; turbo engines are designed > with special additional cooling provisions for the pistons - some even have > one or more dedicated spray nozzles inside the block to throw oil on the > underside of the piston itself. > Werner
