326 Compression Calculator

Simply fill in the form below to calculate your compression ratio.

Bore (diameter)

Stroke

Cylinder Head Volume

Effective Dome Volume(-) dome, (+) dish

Deck Clearance

Compressed Gasket Thickness.040 is standard thickness

Number of Cylinders

326 Block — Displacement Reference

Over	Bore	3.75" stroke	4.00" stroke	4.25" stroke
Stock	3.720	326	348	370
+.030	3.750	331	353	376
+.040	3.760	333	355	378
+.060	3.780	337	359	382