Your math looks great, but ProSpeed actually dyno'd, to the hub, about 268.
FWIW, I am 99.9% sure the 268 was with H/I/E and a prospeed chip....none of these will help with the turbo application as they are effectivly removed for the turbo
even with the 268 hub... the math still doesnt work. in the formula i posted, we used the 275 number as a wheel number...not the crank number. So...even if they did make the 268 to the hub...it would actually make my point stronger.
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