Calculate Engine's Compression Ratio (CR)
Get accurate compression without the guesswork!
Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine setup, click calculate, and you’re on your way to maximum performance.
| Bore: (diameter) | |
| Stroke: | |
| Cylinder Head Volume: | |
| Effective Dome Volume: Use (-) for Dome and (+) for Dish. | |
| Deck Clearance: | |
| Compressed Gasket Thickness: | |
| Number of Cylinders: | |
| Compression Ratio : | |
| Total Displacement (in.3) : | |
| Total Displacement cc's : | |
Speedmaster Tools
Engine / Performance
- - Bore Size & Bore/Stroke Ratio
- - Carburetor Size Needed
- - Engine Size
- - Engine's Compression Ratio
- - Fuel Injector Flow from change in Fuel Pressure
- - HorsePower from Intake Airflow
- - Horsepower gain from adding Blower Pressure
- - Intake Airflow from Horsepower
- - Rod Stroke Ratio
- - Stroke Size
Rear Gear Requirements
- - Rear End Gear Ratio Needed
- - Speed from RPM, Rear & Trans. Gear Ratios
- - RPM from Speed, Rear & Trans. Gear Ratios
Drag Strip Performance
- - 1/8 Mile Horsepower Requirements from MPH
- - 1/8 Mile Horsepower Requirements from ET
- - 1/8 Mile ET from MPH
- - MPH - Km/H in 1/4 Mile using Horsepower
- - 1/4 Mile Horsepower Requirements from MPH
- - 1/4 Mile Horsepower Requirements from ET
- - 1/4 Mile ET from Horsepower
- - 1/4 Mile ET from MPH
- - MPH from 60 foot time