Golen Engine Service makes available a series of online engine and drag racing math calculators to assist in finding values such as engine displacement, compression ratio, piston speed, rod/stroke ratio and ET related calculations for the drag racer.

They are simple, quick, and free.

• Calculate Engine Size in Cubic Inches and CC's
  also Bore/Stroke Ratio and Rod/Stroke Ratio
   
• Calculate Engine's Compression Ratio (CR)
  or Total Volume Or Combustion Chamber Volume
   
• Calculate Change in Fuel Injector Flow from
  change in Fuel Pressure
   
• Calculate Size of Carburetor Needed in CFM
   
• Convert Airflow to a different Depression
   
• Estimate Horsepower from Intake Airflow
   
• Estimate the Horsepower gain from adding Blower Pressure
   
• Estimate Intake Airflow needed from Horse Power wanted
   
• Calculate Density Altitude and Dew Temperature (Point)
   

• Estimate 1/8 Mile Horsepower Requirements from MPH
   
• Estimate 1/8 Mile Horsepower Requirements from ET
   
• Estimate 1/8 Mile ET from MPH
   
• Estimate MPH - Km/H in Quarter Mile using Horsepower
   
• Estimate Quarter Mile Horsepower Requirements from MPH
   
• Estimate Quarter Mile Horsepower Requirements from ET
   
• Estimate ET for Quarter Mile using Horsepower
   
• Estimate Quarter Mile ET from MPH
   
• Estimate MPH from 60 foot time
   
• Calculate Speed (MPH - Km/H) given RPM, Rear Gear Ratio and
  Trans Gear Ratio
   
• Calculate RPM given Speed(MPH), Rear Gear Ratio
  and Trans Gear Ratio
   
• Calculate Rear Gear Ratio Needed