I'll be posting pix and diagrams later, I'm just lazy. Electriclly its actually quite simple, just has to be adjusted right. The mustang TB is 65mm, virtually the same on all min-90's to early-00's ford V8's. The 65mm TB + stock exhaust piping is equal to a 3" pipe cross-section, although a FULL 3" exhaust is enough for 500whp. Right now its using eCtune to open the cutout above 75% throttle -
automaticly. I do have overrides to open or keep it shut. A cheap nog using uberdata/BRE/etc could just use a 3-volt or 5-volt relay tied to the TPS; a smart nog would use a voltage compairator.
With the SC14 blower, are you going to twincharge it with a turbo, or use that valve as a vac bypass? If you're twincharging, a guy on H-T named rmcdaniels has tried it a few ways. He found that slowly opening it with a wastegate actuator after a set PSI works the best for response, IAT's, and power. Regardless, my junk is basicly a gearhead motor with an arm on it, pulling the cable.
$150 minus rhmt's cut would be tits, and still cheaper than any other cutout.