how much boost can you give a r33 with a fmic an apex controller + 3" from cat back. the turbo has been rebuilt with a steel wheel not ceramic. an also running r34 pistons 20 thou over. an have a long lasting engine not a melted pile of pistons... any help would be great. an also where is the best place for tuneing skylines close to ballarat VIC. .....CHEERS spool up an boost away.