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here is what i have gotten out of the shop manual so far:
944S used 289x20 discs
951/944S2 used 299x24
(these are both early year numbers)
what i can't get out of it is which year had the big pot/hat that these 87 944S arms use due to the hub size (to accomidate ABS).
question...if i have the arms that normally use the small discs, but still have the correct caliper bolt spacing of 94mm, is the caliper going to be sitting too low to allow the larger 951 discs on? should i use the NA discs with 951 calipers? it is substantially thinner. the wear limit on the 299x24mm disc is 22.6mm. not sure how well the caliper pots can push down to a 20mm disc especially after wear. perhaps i should have gotten late turbo arms and not 944S.
seems like this should be a common upgrade path for the 944S guys though.
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