CompRat
Compression Ratio Calculator V1.6, Copyright (C) 2024 Mark Olson & Todd Warren
Feel free to copy and share, but please give credit to the authors

Be sure to check all of the default values for your particular engine. We are not responsible for any problems due to errors in this calculator.

Select your base engine configuration:

4.6L 4.6L, 3.75" Stroker 4.6L, 3.8" Stroker Custom 4.6L Big Bore 4.6L BB/3.75" Stroker 4.6L BB/3.8" Stroker 5.4L 5.4L Stroker 5.4L Big Bore 5.4L Big Bore/Stroker Coyote SBF 8.2" deck Godzilla 351 302 289
4.6L Base Configuration selected.

Configure your motor (all lengths are in inches and volumes in CCs unless otherwise noted):

Bore (B):                               
Gasket Bore (G):                   
Piston TL Dia (P):                 0
Stroke (S):                             
Crank Throw (S/2):               0
Con Rod Length (L):             
Compression Height (H):      
Deck Height (Dh):                 
Ring to Piston Top (r):           
Piston To Deck Height (d):    0
Gasket Thickness (t):             
Cylinder Volume (V):            0
Volume Above Ring (Vt):      0
Valve Notches/Dish (Vn):      
Dome Volume (Vd):               
Piston to Deck Volume (Vp): 0
Gasket Volume (Vg):             0
Head Volume (Vh):                
Volume Clearance (Vcl):        0
Compression Ratio (CR):       0
Cylinders:                               
Liters:                                      0
Cubic Inches:                          0
Rod Stroke Ratio:                   0
Piston to Head:                       0