First saw this new engine (MC4S) spotlighted in Feb'16 issue of
Car & Driver, then found this earlier on-line article:
Can Dan Gurney
The 'interesting' aspect (for me) was the leap from 141 hp to 262 hp with his change from straight intake to optimized tapering intake...that's an 85% increase in power...from 110 cid/1.8L and only 9.5:1 compression ratio!
This is his (Dan Gurney's) website on the MC4S engine with simulation data:
http://www.momentcancelling.com/simulation-data.php