Some info for you guys. This is what is soon hopefully that will be living on mine if I ever get everything done around here so i can start.
Ti compressor wheel, flows around 70 to 75 lbs a minute up top at 4.2 bar, compressor housing is around a .80 ar, turbine housing goes from a .14 to 1.85 ar. or 3cm to +25cm . I've read it flows around 57 at 28psi through a stock dsm intake.
The first to do this was a guy with a 2G his sign on name is aero on the different boards so do a google search for aero vgt and you'll find plenty of reading also a danny250f or something like that his is the red car on the you tube video of the vgt dsm.
Heres what was posted about his on DSM talk remember thsi was with just a 14b actuator hooked to the control arm and not using the on board electronics.
Aeros results:
The actuator holds the VGT closed until 6-7 psi, then spool slows down. Its weird, driving normally you can't really hear much exhaust note wise the only thing you hear is the turbine wheel whistling, keep in mind this is through 8" of exhaust. Once it hits 6-7 lbs, the note changes totally, the rack is open fully by ~10-11 lbs I beleive. It sounds sort of like an electric cutout opening, but not as loud. I think even though it has a huge hotside the vanes still help quiet it down, but make it whistle more. Go under and overpass and it sounds like a jet flying by.
Here is a log from ~70mph cruise in 5th gear showing the transient response. 70kpa, to 9psi in about .95 seconds at ~3000-3100rpm.
It spools a good 1000-1200 rpm faster than the small 8 blade HX40 in the .55A/R bullseye housing I had on the car before. Even with the VGT open fully which is somewhere far above 1A/R. Over 3500rpm or so the boost keeps climbing, by 4400 rpm it reaches 24lbs and climbing rapidly. I'm really glad I included the external gate