has anyone ever heard of this particular model? i saw one tonight on a cummins in my school's automotive shop. it has a wastegate, i didn't check the casting on the exhaust side to find out the housing size. it has what looks like a 4" outlet. similar looking to an hx-35w with the plate on the backside as well. i was going to research them and see what i could find. but i thought i'd start by asking all the experts here. so what do you know as far as sizes go... comp. wheel, turbine wheel and housing size? TIA for anything you can contribute.

 

what i've found so far is that they are standard 40's which have a water-cooled center section and the "G" stands for gas. and they were used on CNG or LNG gensets. what are the dimensions of standard 40's? would it be just as easy to run oil supply and return lines to it in order to convert it to oil-cooled? i've heard some guys tend to stay away from the water-cooled turbos. why would that be? is anything wrong with them?