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« on: April 03, 2015, 02:49:40 PM »
Yes, crank is lightened for about 11lbs, it is not reworked m42 crank, that would not be possible to do. Well, there is no optimal setup, with 87mm pistons and good head gasket setup works fine. As we have no access here to us pistons s50 i dont have any specs. If pistons are shaved flat that would probably end up with commpression ratio bigger than 10.5-11. We dont have forged pistons 86mm to recomend, s54 s50 euro forged pistons can work but have to be shaved more than 4mm. It would probably work with these 86 us pistons, however we recomed our 87mm lightweight pistons. No dyno numbers for now, i can send you some photos of our engines. I will send you photos. If you have some more questions feel free to ask.