wrote:

1. Replace the dry vacuum pump with an Airwolf wet pump + Air/oil
separator(~$2500 not including labor - our AP estimated 1-2 days!).
Our
original plan was to get a new dry pump (the existing one has been
spewing some carbon) + Precise Flight backup pump. Since we intend to
get instrument rating and may attempt IFR traveling (probably mostly
soft IFR), we think that the wet vacuum option would be a wiser
choice
and may even out the initial cost in the long run.


I consider a second electric AI to be a superior backup than a standby
vacuum if you have the panel space for it. The electric AI price has
come down to a more reasonable (still expensive) level.