Originally Posted by
Rick
Later ECU's need a knock sensor, or will run like a bag of shit. S1 or V early S2 is the best as no knock sensor, the knock sensor circuit very often removed timing for fun.
I dont really know enough about it to be honest, just what i was told when i had mine set up. my engine is a late MFI (has CPS hole in block) and that runs on an S1 ECU with knock sensor disconnected.