Kai-
are there any Pitts S-1 (C/S/T/CC) pilots in this group?

If yes, I would like to ask what your experiences are with your engines. I'm
in the process to start building a S-1S but have not yet decided which
engine I will finaly use.

Choices are (by now):

O-360
IO-360
AEIO-360

I would like to go for the 0-360 and add a oil system according to Curtis
Pitts original drawings.

I'm not a builder, but I am an owner- of a factory-kit S-1S with an
AEIO-360-B4A. My engine also has a Sky Dynamics tuned exhaust and
cold-air induction system with a swiveling oil pickup. I looked at
O-360-equipped models, but I heard some things about pressure carbs that
made me think twice about choosing to go down that road (the main issue
being diaphragm aging).
So I was all happy with my fuel-injected engine, and six months in I
had a problem with my fuel injector servo. It required essentially a
rebuild of the servo, which kept my baby on the ground for several
weeks. But I still am irrationally, happy not to have an aerobatic
airplane with a pressure carb.
Other than that, I've been very pleased with my engine, and it has been
otherwise trouble-free.

Tom P.