kiwi chick had the engine recently been overhauled thus giving the cylinders a higher compression ration than a half life engine? Conversly,
backpacker, how many hours does the engine in the R2160 have on it?
The one time I had my engine cut on closing the throttle the prop did stop but I was only doing 40mph at 5' above the runway so I didn't have a chance to evaluate any improvement in gliding characteristics

but I did notice the sudden loss of residual thrust. It wasn't the best landing of my life