Expiremental OM617 build
Expiremental OM617 build
If you stuck with 26mm gudgeon pins you maybe could get bushings made for the piston bores that reduce the height of the piston and lower the CR instead of getting a thicker custom head gasket. Bit backwards with a smaller rod bore than the piston though.
Other way of doing it is stick with the "NA" pistons. That would be an interesting experiment actually.
Oooh, an A pump. Since I've realised how twitchy superpumps are, I've been wondering if an industrial constant RPM type governor would help with sensitivity...