I bolted on a HKS T51R Kai BB for shits and giggles to a stock RB25 longblock. Had a Greddy plenum/115mm intercooler/PowerFC.... was a rocketship i tell ya! Had to flatchange gears to get some boost into the system, made next to no boost in 1st gear. Only ran 9psi, was a bit timid with boost at the time. Had to bump up the rev limit on the dyno to 8500, when it hit boost at 7k it fried the tyres.
Oh, made power for alot more than 2 minutes. Took it off out of frustration (and had another turbo to try out). Even tried out circuit racing at Eastern Creek with it, Roy and I couldn't stop laughing at it (well, until it fouled the plugs and nearly had to be towed off).
Visual appeal was at a maximum though.