Email your questions or comments to Dan Back to Dan's Racing Supply Home Page Enter Dan's Racing Supply On-Line Store View Technical Information All that Legal Mumble Jumbo See what is in your Cart Buy all that neat stuff in your Cart Dan's Racing Supply, Your Circle Track Parts and Equipment Headquarters.

 

 

 

Compression Ratio Calculator

Bore in
Stroke in
Head cc's
Gasket Thickness in
Deck Height in
Dish or Valve Pocket [-] or Dome [+] cc's
Number of Cylinders

Displacement Cubic Inches
Compression Ratio

 

Compression Ratio Formulas
GV (Head Gasket Volume) = Bore(in) X Bore(in) X 12.87
    X (Head Gasket Thickness in Inches)


DV (Below Deck Volume) = Bore(in) X Bore(in) X 12.87 
    X (Inches Below the Deck)


HV (Head Volume) = CC's


VV (Dish, Valve Pocket, Dome Volume) = CC's 
(Minus for dish or valve pockets, Plus for dome)


PV (Volume displaced by Piston) = Bore X Bore X Stroke X 12.87


Compression Ratio = (GV+DV+HV-VV+PV) / (GV+DV+HV-VV)

Cubic Inches = Bore x Bore X Stroke X Number of Cylinders X .7854

Convert Cubic Inches to CCs = Cubic Inches X 16.386
Convert Cubic Inches to Liters = Cubic Inches X .016386 

Engine in Liters = (Bore(mm) X Bore(mm) X Stroke(mm)
X Number of Cylinders X 12.87) / (16386 X 1000)

Engine in CCs = (Bore(mm) X Bore(mm) X Stroke(mm)
X Number of Cylinders X 12.87) / 16386

Convert CCs to Cubic Inches = CCs / 16.386
       Convert Liters to Cubic Inches = Liters / .016386