Quote:
Originally Posted by karlaw
Question: when you eliminate the secondaries does the engine then have less HP ?
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With Secondaries Eliminated and dependent on CHIP and Tuning.....you have More HP over a much wider range of engine RPM and Throttle Position.
This Marc Haibeck Link explains when the secondaries are functional as dependent on engine RPM and Throttle Position when in FULL POWER Mode 
Marc Haibeck Discussion on Secondary Operation
It should be noted that the 1990 ZR-1, 1991-1992 ZR-1 and 1993-1995 ZR-1 have different Secondary Operational limits in regard to RPM and Throttle Position. It should also be noted this only applies when the Full Power Switch is on FULL POWER.