RE: Another large scale Impreza project
Nice find Frederik.
I have two engines over here, one on my project, and one waiting to be used. The engine cylinder looks like a cross between the two in the pic - I would say make the measurement to be certain. I did and it's a 44 mm x 33 mm, so about 49 cc. If you want to be certain for yours, just unbolt the cylinder and lift it up to be able to measure the bore and stroke. As an approximation, you don't even need to take the piston out of the cylinder, just turn the flywheel and measure how far up the piston goes from bottom.