Owen wrote: >>Is there any downside to moving to the 94mm cylinders vs 92mm's? My son's project currently has the 92x82 for 2180cc. I can move to 94x82 for about the same cost as sticking with 92x82 in an upcoming rebuild.<<
Several of us are running 94mm cylinders on the Corvair with no problems at all. You'll probably go through at least two sets of VW heads before you need to touch the pistons/cylinders. They are well proven. I put 550 hours on a set in N56ML and they still look great and have great compression. I've built two GPASC engines (and torn them both down several times for hub issues), and if I were going to build another VW, I'd use the Revmaster crank and prop hub setup instead. Mark Langford ML at N56ML.com http://www.n56ml.com
