S65 4.0L-4.5L problem

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S65 4.0L-4.5L problem

04-22-2022, 02:36 AM	#1
LIANG LIANG New Member 2 Rep 8 Posts Drives: BMW E92 M3 Join Date: Dec 2020 Location: Oregon iTrader: (0)	S65 4.0L-4.5L problem Hi everyone I am preparing to upgrade to 4.5L for my S65 4.0L 1. 82.7mm crankshaft 2. 93mm iron cylinder liner 3. Forged connecting rod 4. 93mm forged piston CR 10:1 (lower compression ratio because I need to install ESS supercharger) I have a question about the Pistons stats right now The crankshaft has 7.5mm more travel How should I modify the compression height of the piston? Original compression height -3.75mm? Is this calculation correct?
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