how fast is an 88 supra turbo going to be with New rebuilt cylinder block, turbo and valve set; New clutch and fan clutch; Blitz turbo timer included, with Blitz blow-off valve, 3-inch straight cat-back magniflow exhaust; 2 like new Kumho tires and spark plug wires; All new vacuum hose; Rebuilt radiator

get to a dyno and check it out...they're not that expensive, i don't think

not a whole lot faster than stock.
-shaeff

Yeah, your only real performance part is the cat-back,get a down pipe(with a cat delete pipe),intake, and a boost controller and you will see some nice gains.