PS:Calc is a computer program designed for the automobile professional or enthusiast to help analyze various engine and drivetrain needs for optimum performance. Calculate anything from Engine size to Power, Acceleration, Speed, Gearing, and so on. There is also a useful set of Metric Conversion routines included.

PS:Calc runs on PC Compatibles with DOS 3.2 or higher, or Windows 3.x, 9x, 2000, or NT. Any processor from an 8088 to a Pentium with 512k or more of memory.

If you want a graphical interface and have more power under your computers hood, you can order Power Speed Calculator for Windows!

The Windows version has more inputs, savable defaults, a calculator, and a context-sensitive help system. Calculate engine size, compression ratio worksheet, power produced, speed & acceleration potential, gear ratios, intake and exhaust airflow requirements, fuel injection specs, etc.

PS:Calc for Windows

PS:Calc PRO for Windows	The Pro version has even more inputs, save/load files, horsepower graphing, and a context-sensitive help system. It has lookups for most popular transmission gear ratios to aid in finding optimum shift points. It will even graph horsepower and torque produced over an RPM range.
PS:Calc Pro Quick-Tree	Quick-Tree is a racing starting line simulation to help you improve your reaction time. Practice like the pros do, with a .500 full tree, or a .400 Pro tree. Quick-Tree is included when you order PS:Calc PRO, Free!

PS:Calc Main Menu Choices

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1. Displacement/Compression
    Input bore/stroke in inches or milimeters.
    Calculate engine size in cubic inches and liters.
    Calculate the bore to stroke ratio.
    Calculate static compression ratio.
    Show effects of head change or milling.

2. Calculate Horsepower
    Calculate peak horsepower at crankshaft and wheel.
    Show effects of change in compression ratio on power.
    Calculate air flow CFM requirements for peak performance.
    Calculate pipe diameters for single and dual exhausts.
    Show effects of change in atmospheric pressure on power.
    Calculate effects of adding boost over atmospheric pressure.
    Show effects of change in volumetric efficiency.

3. Calculate Acceleration
    Calculate potential 0-60 mph acceleration time.
    Calculate potential 1/4 mile elapsed time and speed.
    Calculate potential 1/8 mile elapsed time and speed.
    Calculate horsepower at any rpm from torque.
    Calculate torque produced at any rpm from horsepower.
    Show effects of weight change on acceleration.
    Calculate horsepower to weight ratio.

4. Calculate Speed/Gearing
    Calculate RPM at any speed, from speed and gearing.
    Calculate speed at any RPM, from RPM and gearing.
    Calculate tire diameter from speed, RPM and gearing.
    Calculate tire diameter from tire size.
    Calculate gear ratio from speed, RPM, and tire size.
    Show effects of overdrive on speed and RPM.
    Calculate RPM required for a desired speed.
    Find proper gear ratio for speed at a given RPM.

5. Fuel System Calculations
  Carburetor Systems:
    Calculate jet size needed for change in altitude.
    Calculate timing change needed for change in altitude.
    Calculate horsepower loss or gain for change in altitude.

  Fuel Injection Systems:
    Calculate fuel pressure needed for injector size and HP.
    Calculate injector size needed for fuel pressure and HP.
    Calculate average BSFC (Brake Specific Fuel Consumption).
    Show effects of change in fuel injector duty cycle.
    Show effects of adding additional injectors.

6. U.S./Metric Conversions
   Convert Linear, Area, Volume, Mass, and Other measurements to/from
   U.S./Metric systems as well as measurements within same system.
   No need for a seperate conversion program; this highly accurate
   converter outputs very large/small numbers in scientific notation.

The DOS/Windows shareware version of PS:Calc can be downloaded here. Save it to a directory (like PSCALC) and run the self-extracting archive. Read the enclosed README.TXT file for more information. Download PS:Calc DOS/Windows. (180k Executable) Download PS:Calc DOS/Windows. (164k ZIP File) Order PS:Calc/PRO for Windows.

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