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Message: [QUOTE="Zeb, post: 1541021, member: 30304"] There’s not a big power difference between an S369 and a small turbine (74/83) S467.7, but the 467.7 is much more robust. Bigger shaft, bigger bearings, etc. I was party to an engine dyno session where a box SXE369/80/.91, an FMW467.7/83/.90, and a custom 468/83/.90 were all run on an engine dyno on the same day. The 369 spooled the quickest and made the least power, the FMW 467.7 spooled about 100rpm slower than the 369 and made 15 more hp, the custom 468 spooled about 200rpm slower than the 369 and make 30 hp more than the 369. The 369 and custom 468 were both put on a truck (CR Cummins) and driven quite a bit. The guy elected to keep the 468 because it made power in a much more linear fashion, and carried the power higher into the rpm range. Exactly what we saw on the engine dyno. One other thing I like is, if you decide to build a custom 468 it is relatively easy to build it on the mid frame S400 chassis (80/87 turbine) and that is an excellent turbine. [/QUOTE]

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