this is how we just done a 200hp engine,

standard head and cam

mahle pistons on a standard bottom end

55trim 2wd cossie turbo t3 with the standard .36 housing

efi inlet with a set of small turbo escort cossie injectors

mapped on the dyno on pectel t2 ecu and a boost control air injectors

it pulled 220 lbft torque
and 215 bhp at 20psi iirc


just by changing the head, cam, injectors and mapping it made 252 at 22 at 6000rpm and 255lbft at 4,4.5 and 5k !

the first stage engine was on boost well by 2200ish rpm
cant remember exact rpm tbh around that
with the cam and head work it moved it to 2700ish rpm

hope some of that helps