My understanding is that most streetable positive displacement superchargers can't match the ultimate flow of a centrifugal blower so for top end performance the centrifugal blowers offer is better and peak numbers for hp will usually be higher.
I like all of the blowers listed but if I switched to injection and went with a blower right now, I'd get the the P1SC because you don't need to put in an oil line which makes installation easier, although I've heard that setting up the intercooler and the ducting takes a few times to get it right for someone who doesn't set these up on a regular basis.
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393W: AFR 205's, hydraulic roller, TKO600.
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