First off the 4 corner idle mod may not be necessary at all on some applications.
The 4 corner idle mod required modding some of the base plate circuits, drilling holes for the idle fuel flow on the secondary side in the main body, increasing the idle air bleeds on the secondary side, plugging the lower part of the Transfer Slot Passage, and drilling new Rear Idle Circuit Discharge Ports at the correct locations.
So adding that capability is a much more complicated operation vs just closing the idle screws on the Primary Metering Block (installed on the secondary side) and just having the easy and low cost jet change capability.
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
|