Just a few things i would do for the following specs & is a ROUGH GUIDE
Fast road
T2 turbo (standard)
strapped intercooler
16 psi max (aprox 140bhp)
re-jetted carb
Fast road/track + uprated turbo
T2/25
strapped intercooler/alloy replacement
18psi max (approx 160-180bhp)
re-jetted carb
uprated fuel pump
uprated clutch (volvo, green box valeo from GSF)
uprated headgasket
cam (optional)
replacement cone type air filter (optional)
free flowing exhaust inc. downpipe (optional but reccomended)
trackday tyres (optional)
Fast road/drag
T25/T28
new pistons & liners (optional) forged (optional dependent on boost))
alloy replacement/FMIC/CC
21-25 psi max (180-230+ bhp)
re-jetted carb (poss larger needle jet)
uprated fuel pump
uprated clutch (paddle reccomended, i used a volvo cover with an AP paddle plate)
uprated headgasket
cam 285 or similar
replacement cone type air filter
free flowing exhaust (side exit or 2 1/4 minimum bore )
drag tyres (optional but your times will drop dramatically on the strip)
wideband controller (optional but highly reccomended)
There are other things you can add but these are the basic ingredients...
If anyone thinks of anything let me know.