Precision Heads

This head has definitely seen some hard times!

fans

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Ej20 part 9. The final. You can’t afford to loose focus because the last part may be the most important. We vacuum test all installed valves, and set the clearance within .001” of manufacture’s specifications. Time and attention well spent!

EJ20 build part 7. Focus on valve seat preparation and valve lapping. I love seeing consistent and even contact patches on the valves after lapping!