How to calculate piston dish?

[MrSony]

I have looked everywhere for the past two hours. NOTHING has told me. Every. Single. Article. Every single one tells you to do that old trick with plexiglass and a syringe. Pretty hard to do when the damn engine is fully assembled in the car. Is there really now way to calculate it? I'm freaking furious. I have the measurements from the pistons I bought, https://www.summitracing.com/parts/uem-1749h-030/overview/make/buick, which is says the dish is 3.050 inches by .205 inches in diameter. Do I just multiply these two together, is there a constant number than needs to be in there? It's driving me nuts not knowing.

 

[-83MONTESS-]

Multiplying those won't get you anything. You need to do the plexiglass trick or find some other way to physically measure cc's. Maybe call the piston manufacturer and ask them?

 

[64nailhead]

pi times radius squared times the height. And you should be furious at your High School for letting you get out of there without knowing how to find the area of a circle and volume of a cylinder.

Can you convert cubic inches to cubic centimeters that most compression calculators work in?

Edit - I figured it for you : 24.5cc