Re: KR Heads
Posted: Wed Aug 09, 2017 10:26 pm
This is a continuation of the -69R cylinder head images.
-69R combustion chamber castings
Comparison of -52R combustion chamber for flat top piston (R) and -69R combustion chamber for domed piston (L)
52R (on left) and -69R (on right) combustion chambers adhered to glass plate. Note at top of picture the -69R combustion chamber (on right) has a more fully developed radius in the circumferential clearance between valve and head vs the flatter less developed radius on the -52R head.
-69R combustion chamber castings
Comparison of -52R combustion chamber for flat top piston (R) and -69R combustion chamber for domed piston (L)
52R (on left) and -69R (on right) combustion chambers adhered to glass plate. Note at top of picture the -69R combustion chamber (on right) has a more fully developed radius in the circumferential clearance between valve and head vs the flatter less developed radius on the -52R head.