RE: Big block.
a factory race hemi? i thought that they were well above 512...such as the hemi dart engines...i believe that they were known to dyno around 600...however, youre comparing a "Race motor" to a full scale production motor...and even if the "race 426" dyno'd 512, the 6.1L production engine puts down in the 460s...so 50 less hp from a full production motor is pretty good.
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