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I don't ever see mention of an air bypass when converting to EFI
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Ive been involved with a few EFI conversions, eg a 3.3 turbo to some sort of EFI using 3.2 intake manifolds.. We have been pretty succesful not installing an idle control valve. As a matter of fact we just finished a conversion, and installed a stepper motor type idle control valve, and we didnt see any differnce whether it was installed or not.
With careful setting of the warm up maps there is no need for a idle control valve.
FWIW the end use of the engine Ive been involved with are track engines...
The idle and warm up controls differ with the various EFI systems out there...some EFI systems are intuitive and easy to tune, others are a pain in the coconuts to set up...
Most documentation that comes with the EFI Systems tells you how to install it, ie wiring etc, and has a cursory "walk through" of the software..They tell you have to make a base map to get the engine fired... after that you are on your own
