418ci using a 50/50 split of MS109 and X98 turns 1000RWHP at approx 6400rpm 9.5:1 compression 16psi boost on a TVS2300 spinning 13.5K.
It runs ID1050s @65% duty cycle with a max pulse width of 12.998ms @5400 rpm.
Heads ported/polished
108mm intake
ls9 block / steal sleeves
stroked to achieve 418
Callies DragonSlayer crank
Callies Ultra-I beam rods
ARP studs/bolts all around
2" headers
various other mods
TVS2300 @ 23.5K (over-spinning the 18K recommended limit) moves 1775 cfm and can only make 16psi on a 418
V-7 YSi according to Vortec moves a MAX of 1600 cfm and can only make ?? psi on a 427
ID 1300s according to injector dynamics will be @89% duty cycle @ 7K on 427ci at 20psi and 78% duty cycle @ 7k 15psi. V-7 YSi will most likely not make 20 on 427.
We all know psi equals heat and is only a pressure/restriction measurement so cfm flow of air is as important if not more important than just the boost number. 1600 cfm is 175 cfm short of the TVS2300. Most likely your V-7 YSi will not make 20 on your 427 but closer to 14-15. If so the ID1300s are only 78% duty cycle @ 7k. and FIC 127lb injectors which are larger than my ID1050s would also work but be at the limit all the way around. So numbers are accurate.
ID1300.jpgZL1-1200.PNGDynoRun.jpg