The LT-5 of the ZR-1 can be setup so that all 16 fuel injectors are commanded on much sooner by the ECM then stock 4,000 RPMs via custom tuning we do

Teammate Autobob at his business has worked on the secondary system where the butterflies are taken off

Autobahn Power
This ZR1 we believe had a heavy back fire in its past which bent #7 cylinders secondary butterfly. Someone then disabled the complete LH bank instead of repairing the problem.

Corvette ZR1 LT5 Secondary Butterfly Repaired Testing System

Team ZR-1
True Custom Performance Tuning