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Hafliger and his dad hooked the engine up to their DTS dyno. You will notice they are using a modified Jesel beltdrive system. They’ve eliminated the water pump, using instead a pool pump to circulate water from the dyno’s cooling tower through the engine. The water inlets are modified Meziere water-pump spacers. This is a cool setup that allows cam changes without the need to drain the coolant. Incidentally, the Jesel system is designed for an R3 race block, and it required some modifications to make it fit the coolant passages in the front of the block and around the front main bearing cap. It is not designed to fit a production LA engine block.