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3W Hank · 06-27-2025, 02:50 PM

I has a bearing thickness micrometer and I can get the std Ford tech ( AERA ) anz normally I use 0.001” clearance on diameter and in race I add 0.005” and oil 5-20 or 10/30 but in this case I has no experiance, will use custom piston and 1 or 1.2 mm rings.
This is not a cruzer, but not just ’race’.

06-27-2025, 02:50 PM	#4
3W Hank Senior Member Join Date: Feb 2022 Posts: 460	Re: 21A rods set up on a 4" Merc crank I has a bearing thickness micrometer and I can get the std Ford tech ( AERA ) anz normally I use 0.001” clearance on diameter and in race I add 0.005” and oil 5-20 or 10/30 but in this case I has no experiance, will use custom piston and 1 or 1.2 mm rings. This is not a cruzer, but not just ’race’.