What kinda of setup? Dyno machine setup or car setup? A reputable tuner with reputable brand of tuning machine would be able to generate both readings. No problem ...

Does not require different car setup.

Which is what your specs on your brochure tells you. Therefor, there is no need to do a dyno on engine anymore. Although the characteristics of each engine differs, the specs are close to it.

Example, my car spec is 80 Kw (109hp) on specs but when dynoed on wheel is only approx 57 Kw (76hp) before tuning. Now with modifications and tuning, it runs at 67 Kw (89.8 hp) on wheel. Do the maths and you are able to get the on engine reading.

While I understand true enthusiast desire, I for one fail to understand how that would assist in determining how that figures can assist them. I see tuning on engine is more to help resolve the issues of reliability of an engine before placing them in a chassis. But the moment it goes into a chassis, the whole figures becomes erratic.

They can get the precise figure and still it wouldn't matter. If I were to take a tuneup engine, B18C for example, and place the engine inside a Civic, the figures churned out for on wheel figures would be different compared to taking the same engine out and placing it inside a CRX. Yet, the same engine will only produce 1 set of figures when calculated on engine. When gear ratios are tuned, they must be tuned on wheel. No point taking the engine out and tune the ratios when all other parts plays a significant role in determining the performance or reliability of a car.

The way I see it, on engine only works when assembling at factory to determine it's realiability. Once inside chassis, that figures don't seem to help in anyway.

I like this, we can learn together ...