For the "HOLDEN SUPERCHARER BOOST UPGRADE for SUPERCHARGED V6". What’s the factory boost rated at? Some websites said 4psi some 6psi. Would running an 8psi or 9 psi pulleybe a safer option or merely a waste of money, also im looking at installing extracto
Posted by MACE Support on 30 April 2018 08:49 AM
Factory boost is at 6psi. If your running your vehicle on 98RON then it will be a waste of time. If your running your vehicle on 95 fuel then the 8psi pulley is recommended regardless of extractors.

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