I see it now.
Well the Greddy kit is not designed for SH models (dont quote me on this, may be they did a change but when it first came out it was only for base cars). The greddy kit suppose to give OK gains, but then again its all in the tuning and prep work. Like I said you CANT CUT corners.
Why am i against NOS/nitros/nawzzzz/juice/psssttt/etc... well because i would like to have the power on tap and always be there when i need it. Driving on a highway or just in case. NOS doesnt give you that. Its only when you spray and even then ... you should only do it like few times in one month or a week. With turbo or SC you always have the power there. Of the line on top end in mid range. No bottle to open no stuff to worry about.
Turbo will give you about 7lbs of boost daily driving and then you can turn it up to like 10-12 on the track. Turbo will start spooling at 3,000rpm and all the way to the top. Turbo does have more potential then a SC since there is more boost and room to improove.
JRSC / jackson racing supercharger will only give you a bosst of 6-7psi. It will only boost when you stomp on it ...meaning ...there is a bypass valve on it ...thats when not boosting its shuts down the boost, leaves the valve open and although the supercharger still spinning... you not getting any boost and its like driving a regular lude. You might see a boost of 1 but not even. Ask some people and they will tell you that around town just doig slow driving or cruising the SC does not boost.
With either turbo or SC you will need extra work such as fuel and ignition done just to be on a safe side, guages, clutch is a must and stiffer motor mounts or at least motor mounts bushings. so which ever road you choose, good luck. My personal favorite is JRSC..why well it give good torque, good reliability factor and easier to maintain. Straight bolt on. Down side is.... a turbo lude will take you since 1. they have more boost, 2. they have better top end. But for a daily driver like myself SC is what a doctor prescribes.
On the tire question..... Well if you going for 17s I have FALKEN FK-451 tires. Good thread wear, hold the road good. In wet they are really good on breaking. Seemed to be a bit noisey when i got them but once i broke them in ... they are very quiet. ALso when you push them.... get get very sticky, which is a good thing.