Originally Posted by
spurgear
ok from top of sleeve to piston is 2.38mm
from top of squish band to shim seating area is 1.86mm
from squish band to plug is 2.38mm
total shims removed 0.3mm
how does that work out?
Well it means that your real head clearance is the difference between
top of sleeve to piston 2.38mm, and top of squish band to shim seating area 1.86mm, which is 0.52mm.
It is a very large head clearance without any shims. With that head clearance you can use even 30% nitro, so the engine will have a lot of high end on 16-20% nitro.
Resuming. You don,t need to place any shims, weird as it sounds, but is the thruth according to your measurements. The distance from squish to plug is not considered when shiming an engine, unless head was modified from stock.
AFM