Quote:
Originally Posted by Boss330
Good find on MAHA dyno results  Agree that those results seems more accurate.
As regards hand built engines. Please think over what you said one more time... In engine building there is something called "blueprinting". That is when a engine is hand built to be as close as possible to the specs and tolerances in the blueprints of the engine's design. Hand built engines are hand built in order to be more close to spec and has tighter tolerances. Bespoke racing engines are hand built, both because of cost of tooling but because with mass production there is always bound to be variations in the different components. Meaning that there needs to be larger tolerances in order for all the components to fit together (like if you have a crank journal diameter that is on the large end of the manufacturing tolerance and a bearing liner in the block on the small side of tolerances). In a hand built engine, dimensions are usually hand measured and the proper thickness bearing is chosen so that the tolerance is much closer to the optimal designed tolerance. |
I guess it depends to some degree at what extent the hands are involved but I'm pretty sure that if you let a modern high quality industrial robot machine 100 engines they will be pretty much identical while if you let 10 different people hand build 100 engines these engines will have more variations to each other.