Luther Gulseth wrote:

617.950 is listed at 115HP and the .951/2 are 123/125HP. If stroke/displacement are the same, what did they change that increased the HP? Are the shortblocks identical? TIA all.

In addition to what has already been mentioned, the w116 300SDs used the earlier AirResearch turbo units. I believe AirResearch was later purchased by Garrett, but don't know that for fact.

--
John L. Ervine
1981 240D 4-spd 270+kmi
1980 300TD 180+kmi
1980 300SD 277+kmi
1977 280S 4-spd 81+kmi
1976 350SE 4-spd 163+kmi
1972 220 278+kmi

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