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Probably had something to do with some extra parts laying around from a discontinued project or in the make of some blocks they were actually overbored. Car companies waste nothing!!!!
Posts by Danger Dude
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Rounding from 3.8 to 3.9 is insane. I work in the Aerospace industries where close tollerances are critical. But I also have seen when parts are oversized or have a particular dimensional problem they will evaluate the problem and if the run of parts made wrong cost to scrap may exceed desired levels and will put them in production with a update in the tech manuals and tech references as well as all maintenance manuals. Hel knowing Ford they probably had 10,000 pistons that were manufactured to close tolleranced to use in the 3.8 so this was there solution.
It is all about profit
It is all about profit
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10,374 Posts
but you dont round up a proven engine just to do it unless there is a internal change
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