JD asked for it, but I figure everyone could bennifit from it.
 

My Truck guys are starting to bring me the info, I will continue to update this thread as I get more info. Put your questions in and I will relay them out and bring answers.

"A few things about the gt42 turbos made for detroit diesel 60 series engines. They are a competitive copy of the KKK K31, BUT the compressor wheel seems to be radically more aggressive. The GT42 is easy to spot because of the detroit diesel logo cast on the compressor cover, but I know that volvo and cat used them as well. I will speak mainly on the ones DDC put out there as they are pretty easy to come by. The color of the tag has meaning red=remanufactured, green=OEM. One should be aware that DDC/garrett had trouble with compressor wheel faliures on early GT models the redesigned ones are marked GTA on the tag. Next there were GT4294 AND GT4202 turbos used on 50-60 series engines, My 4202 is from a 500HP 14.4L the 4294 is found on lower HP 14.4-12.7L engines. There was a 50 Series engine as well (4 cylinder 60) which was used in transit buses, it had an oddball GT4294 with a .91 A/R T6 turbine which was gated. That .91 housing is not an A/R available from garrett as a service part, so if you find one it might be worth fooling with. The exhaust housings are interchangable between all the Gt42's. A/R's were available in .91, 1.01, 1.15, 1.28, 1.44 gated and non-gated and possibly other A/r's as well. There were a few real low HP models with the GT4088."

Re: JD asked for it, but I figure everyone could bennifit from it.
 

I know two people who work at DD call in center.

"---- a series 60!"