How does cid make power?

Dale Davies said

I have run diesels on a manual dyno where it was loaded to an RPM and let stabilize. Then we changed load to change the RPM by 100, let it stabilize again. When stabile we tapped a record button. Then a graph was printed. This generally closely matched the factory graphs used in advertizing. Works for heavy duty where a truck engine is loaded and running down the highway.
For performance street and racing, you want to know transitional torque and HP.

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That test makes sense for what we ask Diesel engines to do. Making along uphill pull with minimal increase or decrease in RPM.

I suppose in a race setting that test would only be effective if you were building engines for Daytona or Talladega where you basically flat foot it all the way around the track.

Of course, if you are wanting to check emulsion or something at a particular throttle opening/load/RPM a brake load test would be what you’d do then too.