UPDATE:
So after figuring what latency for the 800cc injectors, I inputted them into Nismotronic and alas, the car still wouldn't idle. So with this, I sent John my file and low and behold, I was very very close to what latency John was using for these specific injectors! During the 15 mins of messing with it, I found this out below
1) If the latency is set too high to attain a stable A/F ratio, the idle is consistently several hundred RPMS more than what they are set at. Also, the RPMS hang after the throttle has been pressed quickly (A/F staying rich). The car smells pig rich as well
2) If the latency is lowered, but the injectors are scaled lower, the same happens as above (and the car stay rich after a throttle blip)
3) If I leave the latency and Injector scaling and just simply adjust the idle columns, the same as above happens again
Anyways, since it was late I decided to call it a night.
Fast forward to today and I popped the bonnet and BOOM! One of the vacuum port caps had popped itself off of the newly installed IM! I caped it, loaded up a base map with the latency I had for the 800cc injectors, scaled the injectors to 800cc, lowered FP to 3 bar and reset my basemap fuel table numbers and BOOM! Steady idle with -20 in of vacuum! The fix turned out to be free and these big boy STI injector may very well just work out!
Thanks
@JKTUNING,
@BenFenner and
@OnTheChip for the help! Glad to see people are out there willing to help