AP09
I ran my AP09 again today on the bench, and got the following results:
Master Scimitar 7*4 12,700
MA 7*4 14,100
MA 7*3 15,000
Cox 6*4 grey 15,100
Amazing how the Scimitar loaded the engine up over the normal Master 7*4.
This engine has been run about 30 minutes all up on the bench. The piston/liner fit feels good - a nice plop. There is a bit of slop at TDC. The bearing feels a bit rough.
If I can find an APC 7*4 I'll run that and update this post. Similarly a Master 8*3.