Came across a couple of cool pics of font mounted blowers today and it reminded me of many of the old European Grand Prix cars that favoured this set up. One thing that has me puzzled though is the link between the crank and the blower. Assuming these were bolted directly together how was the crank successfully balanced? I'm guessing harmonic balancers of any form were out the question? I've tried to look for technical drawings of a potvin set up but haven't managed to find much. Any info would be greatly appreciated. Sent from my iPad using H.A.M.B.