[Walt Fricke]

With CIS, I suppose you have read the discussions here about the 3.6 cam? But you can't use that stock cam - journals are larger. With the CIS and stock compression ratio, I'd not expect much of a gain from a cam, but there is no replacement for displacement.

The 2.7 CIS pistons have tops contoured especially for the CIS injection characteristics. Those aren't available off the shelf, I suspect, in the aftermarket for 92 or 93mm cylinders. The 93mm cylinders always seemed to me marginal because the part which sockets into the case is so thin. SCCA allowed them in a class, but that's racing where costs kind of go out the window. You might see if J&E could cut you pistons with the CIS swirl tops.

I've got to wonder why, owning a 911 with a 3.2, you'd want to upgrade a 2.7. My first 911 was a 2.7, and it had all the power I really needed for driving to work or taking trips.

This is a US Carrera, right? Don't those command a premium, at least over the 2.7S of that year?