M50b25 crank versus m51d25
Hello... Sorry for my not so brilliant english... So, I have a M50b25 crank and a m51d25 crank 2242898 serial number. Wikipedia say m50b25 has 75 mm stroke and m51d25 82.8 stroke. M50b25 and also m51d25 are identicals. I want to build a stroker with m51crank and m52b28 pistons.... but will be just a m50b25 with very low compression... Very very strange... On ebay also 2242898 it is called m51d25 ... so with 82.8 stroke... Why my 2242898 has 75 mm stroke ???..
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Why you don't just get m52b28 crank from ebay for 200€. The m51 crank is not direct fit anyways.
I would only consider modifying m57 cranks for m50 worthwhile to do because with those you get even bigger stroke than with b30 crank. -
I have b30 on car and also a b25 in house. I want use this because was free I have 5 pistons b28 head cams 2x240 degree harness ecu all... So if i have this pieces i must make an engine :) . I know how I make the engine but I am confused with that stroke...Comment
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Anyway.... if the engine has some mm under deck will be perfect for turbo :) I have soft for turbo and MAF. I must to buy just harness and ECU 413 for this...Last edited by MclubSport; 09-08-2018, 11:27 PM.Comment
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M57 has just 0.4 mm in plus. Has 90 mm. M54b30 has 89.6. If the crank 92 mm from s50 fits will fit also m57 with 90mm...Comment
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