En til:
Jeppe,
Sorry for the late response, but I don't always check my miata.net email.
I am very pleased with the Rotrex. I use my car as a daily driver and so far I have no problems. As far as drivability, I think that it is great. Acceleration is very linear. At 4k there is quite a bit of \"kick\" and it gets stronger and stronger until red line.
In my opinion, the base kit has a perfect amount of power for the street. Best of all, since I have installed the Rotrex, I have not had to do any adjustments. I like to drive, I don't like fixing or messing with things like retarding the timing, adjusting pulleys etc. I have heard horror stories about other turbos and superchargers and that is why I waited so long to boost my car. With the Kraftwerks Rotrex, it was installed and ever since it just works!
I cannot comment on how well the base kit works on the track. However, I have taken a ride in a Miata with a stage two (?) prototype. It was FAST!!!! It was on a track with Porsches, Ferraris and other Supercars and it was holding its own. Mind you it wasn't faster then them, but it was keeping up with the big boys whenever there was a compound turn or two.
I do suggest that you upgrade your suspension though to better match the engine!
Hope this is helpful. Feel free to email me if you have any more questions.
Best regards,
Zen Yieh