thrust has NOTHING to do with the engine used - the reading on the Hobson chart is a reading taken with the powerplant on a stand.-
To get close to real world on that "thrust chart" --you must know rpm of specific propeller and the corrected altitude density -expressed in Hg (inches of mercury).
Still-this will tell you nothing about how the prop unloads in the air -which is simply an incalculable number unless every specific about airframe / engine/ prop / altitude / temp/etc... is known --even then you will likely miss it a mile.
The best setup?
get a good fish scale - calibrate it - get various props - run pull tests and record ALL info from each test.
After you are thoroughly tired of this exercize --with luck, you will see a pattern emerging as to what props and engines make what kind of thrust on which kinds of days .