Well, I have about 100 miles on my TPC setup, and what else can I say, just do it. Even though I did not make the open house last fall, I ordered my kit after seeing some of the DIY posts on this board; thought it would be a good winter project with snow and fog out here in Utah. My 2005 Boxster S had just over 12000 miles, and was just out of warranty, so the time was right.
Prior to the kit, with 280 crank HP from Porsche, at my altitude of 4250 ft, I was getting 244 HP off the crank due to the normal aspiration. With 25% loss from crank to wheels, that left 185-190 HP, at best, at the rear wheels.
Last night, our local performance shop ran the dyno for me: 360 HP at the Rear wheels, and the HP curve was a 45 degree angle and still wanted to climb. He only ran me to 6500 rpm, and boosted to 5.6 psi, so there was a little more to be had! Wow, what a difference. The shop owner was very impressed with the quality of the kit, and our installation. He also liked the very flat torque curve from 3300 to over 6100 rpm. We run 91 Octane pump gas out here, too.
Normal driving to the grocery store is exactly the same as before. Get your foot into the boost, and for the first couple of days, it is basically scary. I am used to it now, and love the feeling. You have such more range in how to drive the car: normal and civil, or crazy fast. It's very very nice, and I hope to send some friends over to TPC. Casey was great to set me up with the kit, and Tom answered any questions by email before noon the next day. It's been a fun winter project, and will be great this spring.
Just do it. By the time you do a flash and pipes, you are over half way there. For what,maybe 20 HP ? You decide. By the way, I have no stock in TPC, but it would not be a bad idea. Casey, when is the article coming out in Excellence?