I know how annoying repost are, I did some research but didnt find my answer. I just wanted to know the approximate WHP gain expected installing the "Vortech V1 SuperCharger". My bad if this is one of those questions people asked plenty of times before. Please reply if you got a answer though.

 

It really all depends on what pulley you use and what other mods you have done to your car.

Mainly with the stock pulley from Stillen, I believe 3.66, expect about 100 crank hp. And then about 10 added per smaller pulley. It really all depends on mods that you have like exhaust and 5spd. That kinda stuff

 

http://www.ericj.org/maxima/doc/scifd.pdf

You know, there is a whole separate section on here for boosted Maximas.... with FAQs

 

Close, but not quit. With the stock 3.61 (no such thing as 3.66) pulley, you can expect around 80 hp.

Check out the boosted forum and read the stickies.