I had the Vanos keep or delete quandary when my Z4 M Coupe engine was being built for turbocharging. It was decided that it was not that necessary for my track car with maybe Motec or Life engine management. If it were a road car and maybe supercharged with standard ECU modified, I would have left the Vanos in place. Hopefully I have made the right decision, and also simplified the engine and got rid of some weight too! The car won't be running till next year due to the complexity of the build, so fingers crossed! LOL
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