In my Raider with a 4D56 i upgraded the turbo with a 13G spool and i'd hit 22psi almost instantly ...i have a large FM intercooler but with fuel turned up 1 turn i was still getting 1200*+ EGTs ...so i just got the turbo redone with a 15g (stealth upgrade) and now it will hit 30psi and make 20psi (where i will run it) more efficently...nothing has broke ...yet ...hehe

'87 Raider 4D56 ...lots of boost
'86 Toy xtra cab 2L-T
'82 Benz G Wagen 300GTD
'82 VW Caddy TD
'79 LJ81 Zuk p'up 1.6TD