the earlier you start in the gear the fast spool with seem to be. so if you start a 2k it may seem to spool earlier than if you start at say 2500.
how fast do you want it to spool i know it will spool by 2800 if you start at 2k
the bcs may help a little on spool but it will mostly help it hold boost better.
when testing for gains try to be as consistant as possible so start on the same stretch of road at the same rpm to be the most consistant with gains.
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