28* initial timing for a 318? How can that be?

92b said
How would you test that? How much longer would a rod have to be to see a difference? How much of a difference would it be? I think engine masters did a rod length test. I can't remember if they swept the timing on both rods to see if there was a difference in optimal timing. Anybody else remember or have a link?
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They built two engines, identical except for rod length and compression distance. I am not sure however if they published the necessary timing requirements between the two, but I can guarantee you that Brule ran timing sweeps on both.