Helmut Punks Out the Dyno (by NA standards)
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If the test is conducted properly, there should be little difference. it really depends on how fast the drums or axles are accelerated. a dynojet is worst case, because it takes into account some inertia. brake dynos do not, so,in theory, they should always be higher for a given car. but, its also why drum dynos are done in 4th gear with large heavy drums so the factor of the inertia is factored out for the most part.
i did 335 several times with the holbert car stock 5 liter, but after many years it stablized at 320rwhp.. same as Rons GT with the exact same mods (i.e. no cat, but headers and exhaust)
i did 335 several times with the holbert car stock 5 liter, but after many years it stablized at 320rwhp.. same as Rons GT with the exact same mods (i.e. no cat, but headers and exhaust)