They're going to want to decrease the size of the restrictor plate now . It sounds like the piston broke off the top half, I know of a class 1 off road racer who used to do this with his A series motors, but it was with standard pistons, if you can believe. Hope to see Jordan in the car at Clipsal Adelaide for the Improved Production races.

is that a 10a rx3 or 13b, either way not unexpected
from Simon`s toy, a methodical tinkerer, congrats.

Just curious simon what gearbox are you using with your Turbo A-series i know this thing makes some serious power