I know a little bit about the Supercharged Titans in general. Stillen made a good kit but it has some tuning issues and will not change the kit to fix the "known and well documented" tuning issues it has. I'm not bashing Stillen by any means, but their supercharger for the Titan needs to be offered as a hardware only kit and let the end user decide on how to control fuel and timing.
2 things automatic Nissan/Infiniti vehicles care about.
#1 Obviously being power/torque.
#2 is a little thing called Calculated load. The ECU determines what the calcualted load is and sends that info to the TCM which in then tells the transmission what to do. If the TCM sees 35% load it's gonna shift nice and soft but once it sees 100% load it will make the line pressure adjustments and move the shift points around to accomodate the increased load on the engine.
Lets go back to #1 - Power/Torque The Titan uses a slightly beefier version of the RE5R05A automatic transmission which is the same trans used in the M45/35 G35 350Z Fronteir Xterra Q45. Its a workhorse transmission. The titan, if anyone knows, has a boatload of torque - stock it puts out 385tq. I've seen modded Titans putting down over 450rwtq numbers without the supercharger. With the supercharger the torque literally goes through the roof and the biggest gain is in the lower revs.
Now lets combine #1 and #2 and you can see that now if the ECU sees less than 100% load but in reality the truck is making 200% more torque then failure becomes an obvious reaction to the Stillen supercharger.
In all fairness to Stillen - Their kit just needs to be switched from a piggyback ignition controller and extra injectors to a system that can program the ECU like UpRev or COBB and be calibrated for larger injectors. Also it should be mandatory that at a minimum a transmission
VB upgrade be included or strongly recomended.
How does that apply to the 370Z - well if you are a 6MT then mod away - change the clutch to a beefier one that has the torque rating slightly exceeding what you will be outputting and also change the transmission fluid to a nice synthetic (redline, RP, Amsoil, etc...) to help with the extra load. Also heat is what kills to add and engine cooler/diff cooler/transmission cooler even for the 6MT peeps. One thing we cannot get away from is rated torque capacity of the transmission itself. Nissan has notoriously installed beefy components in that regaurds at least for the MT cars in the past so not even looking into it I would assume the 370Z trans to be about the same if not better.
If you are a 7sp Auto - then you will be breaking new ground. Expect failures of the transmission. My recomendation is to look at the guys running Nitrous(if there are any) and see what they are facing. Maybe even buy a Nitrous kit first and do some data logs and see what's happening before you take a $5-6,000 plunge for FI.
Any street car can be made to track - and if you got the 370Z specifically for racing then Awesome - if not - then awesome too. We're all Z car guys/gals and we enjoy what the car can offer. I can honestly say that there is a car out there that is better suited for track duty than a 370Z and there is also another car out there that is better suited for daily driving. But that's not why we have them, it's because we think they are awesome, beautiful, masterful, sleek, enjoyable, fast, comfortable, hot, sexy, cool, hip, nostalgic, new, high tech, etc, etc, etc.....
Lets have fun with the 370Z - cause I won't have one for a while and I'm envious of you - but I can say that I have the 4 door version of the 370Z (M45) and it's just as great in my mind. can I get a Hell Yeah? HELL YEAH!