I am running a Vortech V1 supercharger on ROOBY, and we have fitted aftermarket computer, to help with the timing issues the standard set up has with only base timing adjustment, and we are running 10 psi boost, a new Bosch 0404 fuel pump, rising rate fuel pressure reg for boost, and yesterday on the 2wd dyno [yes we removed the front shaft] on 37" tyres, we saw 178kw [aprox 240hp] and around 6000Tn [ 450 ft lb ] @ the rear wheels, which is about the same torque my turbo 80 of the same year, but was manual, vs the current one which is auto, made but we are missing 41 kw, which is about what the V1 would "steal" from the engine to run that boost as a minimum.
We have had some issues with knock sensors, which keep dying, [they ont like heat, and the rear unit in the block seems to get cooked with this set up ATM] hence going aftermarket computer, which has made a MASSIVE difference with being ale to run HEAPS of timing down low, and pull it out up high to sdtop detonation. I would not consider a supercharger, without running the aftermarket computer, on a $ per HP cause, because the gain just wouldnt be big enough, in my opinion, I would rather spend more, and do the turbo to get $ per hp figures more worth while.
The supercharger was a 2nd hand kit I managed to pick up for ROOBY, which saved me many $ over turbo kit, that we were going to do, so i grabbed it, to play with.
Just my findings so far, having owned both a turbo intercooled 4.5 80 95 model, and a supercharged one.
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, and definitely sleep on it. This is exciting but a little nerve racking at the same time. Well I see it this way, if the 
