What sort of power could i achieve with this lot
 

det block
ported et head
poerted et inlet
t3 turbo (18 psi boost)
volvo 940 front mount
s13 injectors
apexi afc
walbro255


260 bit optimistic

Exhaust?

sorry 2.5" straight through with center silencer side exit

Get a piper cam in there as well.

cant find one anywhere bud

Have you changed the clutch?

Piper still do them iirc or alternatively use the Autosprint cam

i will be putting in a s1 uprated clutch to go with my s13 box

Piper still regrind them. You need to send them your old cam.

Some don't recommend the cam, but on my setup it was good. Max power at 6.1K, it was pretty manic at the top end.

The power you could expect would depend on who puts it together and sets it all up. 260hp would be about right on a spot on setup with good fueling but afc isnt the best and it still retains the afm. I expect that you will end up with about 245-250


edit im basing on you using the piper cam as its most beneficial with larger turbos