Dyno a 7.5:1 400? Sure, why not?

I used to mess with a VW engine I wanted to put in a homebuilt airplane. I built it with lots of stroke and 7.0-1 CR to run 87 pump gas. It was a stump puller for sure and would pull up to 5500 RPM.

Re-doing the 496 KB/B1 motor and dropping the CR to 10-1. With the 47cc chambers it will be 0.060 down in the hole with a huge dish. Gonna boost it this time and run E-85. With 10-1 should be able to rum pump swill with the gas carb and no boost.