KR Heads

Racing K Models

Re: KR Heads

Postby wz507 » Wed Aug 09, 2017 10:26 pm

This is a continuation of the -69R cylinder head images.

-69R combustion chamber castings
LR -69R combustion chamber castings.jpg
LR -69R combustion chamber castings.jpg (92.19 KiB) Viewed 244 times


Comparison of -52R combustion chamber for flat top piston (R) and -69R combustion chamber for domed piston (L)
LR comparison of -52R and -69 R combustion chamber casting.jpg
LR comparison of -52R and -69 R combustion chamber casting.jpg (53.76 KiB) Viewed 244 times


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.
LR arc of circumferential valve relief in -69R head.jpg
LR arc of circumferential valve relief in -69R head.jpg (29.05 KiB) Viewed 244 times
wz507
 
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Re: KR Heads

Postby Simon » Thu Aug 10, 2017 1:12 am

Wow - what a find! I note there is a domed piston on ebay at the moment, overpriced though...

I am enjoying this thread immensely!
Simon
 
Posts: 98
Joined: Mon Oct 12, 2015 10:14 pm

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