Its not all about the most fwkw. When you drove blue monster you realise that any more power would be pretty dangerous in that car's chassis. Sure you can go for it to be a "dyno king" that wins a paper certificate and gives you a hard-on, but it won't make the car any more rewarding to drive. The only exception where it might be "fun" is if you were making a purpose built, drag-ONLY monster that you didn't want to drive on the street.
But if you own a car like blue monster and drive it and have gone through all the sagas, reliability issues and gearbox explosions, you realise that it already had oodles of excess power. Reliability and smoothly getting the power down becomes the big priority.
E.g. a car with even 120fwkw, BUT a mechanical LSD and slicks could have beat blue monster from 0-100kmh, even if blue monster gained another 50fkwk. A mechanical LSD and tyres would have made a much more useful real world improvement, but then does your gearbox snap soon after? Probably.. So get your $5000 ready for a custom made dog-cut gear set. Then enjoy the loud whining noise and clunky shifts in your "daily driver" that now shudders along, vibrates and is not so refined and smooth any more.
Although I never snapped the 31V box and was very happy with it, deep down inside my head, I was never purely confident that I wouldn't die if I was under full boost at 150kmh - there was always those "what if this whole thing let's go, then I'm dead" thoughts etc. Because when my 30A gearbox died at about 40kmh, even that was terrifying. Even in neutral, the car was sporadically locking up, jerking, locking up the tyres, crunching and randomly stopping the front wheels. There were pieces of metal everywhere that interfered with the drive train even while coasting out of gear with the clutch in, so I couldn't imagine what would happen if I was moving along at 150km/h.
There is a lot to be said about a super smooth, reliable factory setup
If you are still set on being a "power king" then, at least the easy thing with going for more power is that you can just raise the rev limit and as long as the torque curve is staying level and not dropping away too much, you will just gain power from that. Or just run some more boost or change the turbo to a different flow spec, once you have the rock solid bottom end, you can just play with different turbos etc and get more power etc. But wear might increase and reliability decrease proportionally if you are revving your little CG to 9000RPM
