Well like the title says looking for ideas on what size turbos to run. Car is street raced for the most part but looking to turn it up a lot and start racing some track stuff.
Setup on the car now,

1990 Pontiac firebird

Engine408ci dart lsnext shp iron blockCallie's dragon slayer 4.00" crank
Callie's ultra I beam rodsWeisco pistons with tool steel pins9.8:1
​​​​​​trick flow genx 255 LS3 6bolt headsHolley single plane with elbow and 102mm throttle bodyHyd roller 238/242 629/621 116+5
Ms3 pro ultimate ecuHolley 160# injectors
e856gpm fuel pump

TransFreddy brown th400
Rmvb foot brake
Ultra bellHuges bolt together converter

Rear end
9"
35 splin spool3.50 gear
Dual 4 piston calipersStrange adjustable coilovers28x10.5 or 275 radial
car currently has a s475 t6 on it, I was looking at doing twin t4 1.10ar s475s but wasn't sure if they would get the job done




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