An engine dyno is only as good as the person using it.All dynos do the same thing.whether it be an inertia, electric or water brake dyno .They all Give you a reading after you have made an adjustment to your engine.In the real world your engine builder should be able to create a scenario in his dyno room whether it be hot or cold , heating the room or cooling it to replicate track conditions before the dyno run, that should be all part of the process .They also should be using in there dyno room an auto climate monitor.This adjusts the dyno figures according to the air/room temperature .Many engine builders tend to bolt your engine on there dyno,Do a few adjustments and give you 3 power runs from a cold engine.This will give you good readings .They don't tend to want to get the engine at normal running temperature before they power run the engine because the figures would be a lot lower.So i would like to just finish off by saying if you have a good w60 comer engine dynoed at race temperature you should be looking at a maximum of 6.2 hp.check to see what the engine temperature was at the time of the run on the data sheet. p.s i would just like to point out that horse power is only a guide.you should pay no attention to it...You should be more interested in run time and torque values.google that for more information.
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