If your engine rebuilder puts your engine on his dynamometer before he touches it and records its performance then checks it on the dynamometer once he has finished the rebuild, he will hopefully see an improvement. By analysing the results he can see where the power curve occurs and can tune the engine for a particular track. This will of course cost extra money if he has to keep stripping, adjusting and re-dynoing the engine. The upshot of this is, if your engine rebuilder does not do this because he does not have a dynamometer, how will he or you ever know if, or how good that engine will perform. It is akin to pumping up your tyres without a pressure gauge to test the pressure with. You MUST be losing performance. if you just measure, that is just "poke and hope" engine building and is not relevant in today's competitive racing. You must use a dynamometer or be a dinosaur. The dyno gives you a constant to refer to. It does not matter whether it produces the same results s x,y, or z builder, they will never match anyway, but at least it is a base reference for all the engine that are run on that dyno.
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