In my experience with my our builds and helping with other Z enthusiasts builds naturally aspirated or forced induction the VQ37HR gets expensive quick. Parts and labor if you are not doing your own work is quite costly. If you do all the required general maintenance on time on your Z these cars will last a long time. If you are looking to have your Z last 10+ years I would recommend you stay naturally aspirated and do a few bolt on modifications and purchase a long extended warranty with your Z. Forced induction reliability depends a lot on many different things. If you want reliability/dependability with any forced induction set up hope that the correct fuel and air upgrades were done on the Stillen supercharger kit as well as is there a safe tune done by a reputable tuner with this supercharger set up? How was this Z used since the supercharger install? After 30K the supercharger head unit could need to be sent in to be rebuilt? There are a lot of variables to consider. Track days and track experience is enjoying and fun but it takes a toll on your Z with up keep and maintenance on your Z needing to be done. To meet your whp goals you could do it naturally aspirated and do all the bolt on’s under the sun but you will be very close or right at the cost of a single or twin turbo kit. If you want to keep up or beat the new 6th gen. Ford Mustang GT’s if that is what you are talking about it will require forced induction on your Z as those cars are underrated in terms of making power and it will be easier and more cost effective to go the forced induction route. Remember with forced induction the more you push the envelope the less reliable it will be.
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