Reply to "Valve in new engine not seating"

I used Summit's calculator and it came in at 9.64. I don't know if I am doing this correctly. If 9.64 is correct then 93 octane will work fine.

Compression Ratio :	9.64 : 1
Total Displacement (in.³) :	357.16
Total Displacement cc's :	5855.08

Inputs to Summit's calculator: Bore 4.030, Stroke 3.5, Volume 62.8 cc, Piston Dome/Dish 0.0, Deck Clearance .072, Compressed Gasket .033, Cylinders 8

It could be the deck clearance (.072) that is reducing this engine's compression ratio.

10/8/2411:06 AM

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