Deck Height vs Squish Area
I am assembling my 87 930 engine using a set of 98 mm RUF pistons and cylinders (CR = 7.5 to 1). I am also using head gaskets for the C2 turbo (.51mm thick) to help prevent any cylinder head leaks.
Measuring multiple times I get:
Deck height = .61 mm (measuring with caliper from top of piston to top of cylinder with piston @ TDC)
Squish area = 1.37 mm (measuring with the solder method)
As per Wayne's book the "deck height" should be between 1.25-1.50 mm. Which measurement do I use?
A second question is should I preassemble to measure the piston to valve clearance. With stock CIS cams and flat top pistons what are the chances that I would not have adequate V to P clearance.
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Victor Toce
2000 Boxster S w/
Tequipment exhaust
1993 Spec Miata
87 911 turbo - sold
3.4 RUF pistons and cylinders
Euro CIS head
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