OS Giken TC24-B1
Original design — conversion from belt to gear-only camshaft drive system. Engine response and timing accuracy are increased and the sound of the engine becomes subtly more exotic. This changes the feel of the engine completely. This level of development to the old L-series has always impressed me as there are no power gains, only an improvement in the driver/car connection.
It’s been put to use and tested. At least the TC24-B1Z is. It truly is something to marvel over. Here’s a video test from OS Giken.