My engine has been converted to run on unleaded by the way, I run it on BP Premium unleaded, I can notice the difference when I run it on anything else..
I can rev my engine out to just over 6000RPM (Once your over that *INSERT VALVE TAPPING SOUND*), 3500RPM - 4500RPM is where most of its power is at, damn I love hearing it rev :)
Whats the official top speed figure for a 4K-C engine, how fast were they rated to go, anyone know an official figure? How fast have you wound your 4K-C out if you have one?