I had a 88 CEFIRO 5 spd, 3" , airpod,remapped ecu, standard AFM!!,12pounds boost on stock cooler..
the car was fine, shifted nicely, on*off acceleration and on*off boost was perfect.
i also had a R32 GTST and that had a aftermarket rice bov, i couldnt tell the differnce besides the CEFIRO sounded much better with its ancient flutter and the ricer R32 sounded like a crock of PSCHHHHHHHHH with its fully sic bov
p.s the cefiro from 90onwards has a BOV, the early models didnt.