As part of the extensive work I'm planning to do on 16655 while I have to fix several really bad rust problems on the frame I'm planning on swapping in a different engine, and one of the top contenders at the moment is a Mazda 13B Renesis from an RX-8, both because I rather like rotaries and because the car was originally planned to use one. However, most of the capability of the rotaries comes from their ability to rev to the moon and back- the higher-output 6-port version reaches max HP output at over 8,000 RPM- far higher than the PRV's max-HP RPM of 5500. I've looked and have been unable to find any info on how high the 369-08 5-speed can safely be spun, does anyone know? Thanks!