Quote Originally Posted by erice1984 View Post
between shifts at higher rpm most engines will knock a little bit, also tapping near the sensor to get a response. The engine is a 4G63 motor in my friends EVO 8.

Reason for the seg-LED is this is all he wants on it. Also it is smaller than using LCD, I know code is going to be longer but I guess that is a trade off, and all the PIC is going to be used for.

8MHz clock isnt fast enough?
EVO 8 - not going to spend much time doing part-throttle acceleration is it?
8Mhz not fast enough? - most likely not, but I think your main limitation is going to be the speed of the A/D converter.
Are you tapping into the existing knock sensor line? Can you tap on the block and watch the timing back off or what?