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R56 stock ecu compression change

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Old Mar 30, 2026 | 06:48 PM
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stock ecu compression change

im rebuilding my r56 MSC engine and i want to change the compression from 10:5:1 to 10:1 with oversize bore and i don't know if i can do it on the stock ecu or if i have to go aftermarket
 
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Old Mar 31, 2026 | 03:31 AM
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What size and type of pistons will you be using? What is maximum boost pressure you intend to run?
 
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Old Mar 31, 2026 | 03:46 AM
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supertech forged 77.5m and probably gonna max out the turbo
 
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