I feel they should build a big bore short stroke twin cylinder around 1200cc with a 10:1 comp ratio with 5 valves per cylinder and with dual overhead camshafts with variable valve timing, variable ignition timing and big throttle bodies and a high flow exaust. they also need a turbocharger. or a supercharger. the problem with a turbo is that you have to wait for it to spool up. the problem with a supercharger is that it takes power to make power. also a dry sump oiling system to keep weight down. there are also many little engine building tricks like forged rods and pistons with pin very close to the crown and a short skirt. it may be a bit more pricey but with a forced induction system you can make big power.