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morkusyambo morkusyambo is offline
Junior Member
Posts: 124
Join Date: Dec 2013
Car: 328i
Default 04-06-2015, 09:08 AM

Is the stage 1 boost for the S55 adjustable up to 6psi as well? If so, what octane would you recommend running at 5 or 6 psi? I have access to standard 93 octane with @ 10% ethanol.
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