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      08-28-2011, 06:05 PM   #39
VinnyM3 for life
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Drives: S54 BMW M roadster
Join Date: Aug 2011
Location: California

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The S65 and S85 engines would achieve a piston speed of 25M/S at 10'000RPM witch would make it close to a stock S54 engine from the E46 M3 (24.27M/S) and actualy lower then a F20C Honda S2000(25.2M/S). I am prety sure that the rod bearings of the BMW S85/S65 are much more stronger then the S54 M3 being that the new S65 is a evolution of the S85 and in turn the S85 is a evolution of the S54 especially after all the rods bearing failure in the early E46 M3. To spine at 10'000RPM and make power there I'll suggest having crower build you custom: titanium rods with their strongest bearings and lightes piston with every upgrade you can performe on them like coating..... To minimize drag/friction and to finish have them lighten up the crankshaft then have VAC motorsport build you stage 3 heads they are capable of 150hp per liter. You'll also need better engine breathing( exhaust, intake). With lighter internals and stronger bearings the engine can spin at 10K safely as the load is reduced, friction is reduced, piston speed is similar of a stock E46 M3, wen I said safely I mean as safe as a 1000cc bike revving @14'000RPM. Now how is the tranny handle 10K I don't know.
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