Some dyno testing you guys may want to follow on YouTube

273 said

Well you got to take the results with a gain of salt, but if you keep on see X head and Y head make a certain amount of hp with similar general parts, think it’s safe to say if you build similar your gonna get similar results.

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That’s assuming they are building the engines right. Most guys don’t use near enough compression. And they don’t tune well.

As you add up the errors it becomes obvious testing and doing it correctly costs a huge amount of money and takes time.

Not all testing is good testing.