Originally Posted by mahlon_r
n/d has conical engine mounts while the wide decks have dynafocal mounting systems. On the n/d engines you can't run the wider diameter intake pipes that the wide deck engine uses.. which may be a consideration if really pumping the HP.
I bought a "Maintenance shop" O-320-A2B n/d. Had to have to whole thing checked out so I had the crankcase shop rework the engine mounts from Conical to Dynafocal 1.
"Pilots: Looking down on people since 1903"
RV-9, N556RM, O-320, Dual PMags, Catto 3 blade.
100% finished - flight ready - FAA inspected
Mosquito XEL kit in hangar waiting on RV-9 to fly.