I'm running what my signature says with 8300-8350 rpm, 2300' altitude, boost 12.2 psi, air fuel ratio at 12.2-12.5 wot, 11.5-11.9 at 3/4 to 7/8 throttle. Rrfpr set at 67 psi & won't go any higher. What injector should i go with to get the rrfpr back to 60psi range.