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From link above, post 102- "In the NHC250 era, some applications needed a way to supply more air to the engine to help eliminate black smoke problems, especially in higher altitudes and Cummins developed a turbocharger 'smoke kit'. The kit included all the components required to install the...

Right... Moving right along, folks considering this mod may recall how engineers made the LD465 into the LDT465. They had no problems (except for a head gasket that didn't cut it on the nat aspirated LD). There was also a bolt on upgrade called a clean air kit. Lots of them are around...

I have no idea why guys spend their money turboing these engines... But my 250' is 14 litres of crap... Sound critical to me. Turbos don't blow cool air, unless the air has been substantively cooled through an intercooler... I said relatively cool air. At 18psi non-aftercooled air it is...

The drive-train is not a weak link.

I read it was because they wanted a stiffer cam, better able to deal with higher pushrod loads (at higher HP and/or exhaust brake). The small journals limited the max diameter that'd pass thru the bearing... I was amazed to read someone here is critical of adding a turbo to a naturally...