Offering Performance Software Since 1987

A Computer Program designed for the motor sports enthusiast. Performance software that does the math for YOU. Handy Car Formulas for high performance math that will help you to analyze your (Street / Drag Racing, Circle Track, Oval Track, Road Racing, Off-Road) Car / Motorcycle / Kart / Engine and chassis needs, and improve performance. American or Metric Input (This is some what Limited). The menus are straightforward and "fill-in-the-blanks" data entry will get your answer. The most important thing to remember is that the more accurate your input to the program, the more accurate the answer will be. Although some examples may show only one or two decimal places the program will accept however many you key in, but any more then seven will not hold accuracy. Calculates engine displacement, Bore Stroke ratio, Rod Stroke ratio, Piston Speed, compression ratio, air and fuel flow, rear end gear ratio, shift RPM, 1/4 mile et and MPH, 60 foot MPH and G's, a change in Horsepower from a change in weather, or altitude, or adding blower pressure, Carburetor size in CFM, Carburetor size in CFM for blown engine, Blower Drive Ratio and RPM, Pressure Ratio, Intercooler Efficiency, Intercooler Density Ratio, Compressed Air Temperature, Blower Density Ratio, Compressor Inlet Flow in CFM, Drive Wheel Torque, Aerodynamic drag / HP Loss, Acceleration and Top Speed Prediction, Horse power Prediction from MPH's and Times, rollout distance, tire growth, trans power loss, shift rpm, shift time, % rear end power loss, % converter slippage, coefficient of drag (CD), launch rpm, Horse power Prediction from RPM's and Times, Est. Frontal Area, Carburetor jet size or bypass jet size change based on change in weather, Header tube length, Air filter size, Vapor Pressure, Dew Point, Saturation Vapor Pressure, Density Altitude, Dyno Air Correction Factor, Air Density Percent, Air Density, Lap Speed (MPH) over measured distance from distance and time, Lap time over measured distance from distance and Lap Speed, skid pad G's, Coil Spring Stiffness / Rate, Wire Diameter, Number of Active Coils, Mean Diameter of Coils, Modulus of Rigidity, Number of Coils, Solid Height, Torsion Bar Stiffness / Rate, Torsion Bar Diameter, Sway Bar Stiffness / Rate, Leaf Spring Rate, Camshaft duration needed from compression ratio, Exhaust/Muffler(s) Airflow for no Horsepower lose, Piston Travel, Crank Rod angle, Rod Bore angle and Cylinder volume over piston vs. Crank Rotation, Crankshaft revs per Second Crankshaft Degrees at which rod and crank are 90 Degrees, bearing speed, Rotation Time of crankshaft per degree in Milliseconds, crankpin load, Rotation Time of crankshaft per rev in Milliseconds, crankpin force, Max RPM from Piston Speed, Needed Combustion Chamber Volume, Needed Chamber (Total) Volume, Needed Dome Volume, piston deck height, Block Deck Height, Piston Compression Height, BMEP from Horsepower and RPM, BMEP from Torque, EFI injector size in lbs/hr / Fuel pump flow - from Horsepower, Change in EFI rating from fuel pressure change, duty cycle, fuel pump flow, Compression Gauge reading for a given engine size, Compression ratio from Compression Gauge reading, adjusted/effective compression ratio, Dynamic Compression Ratio, Est. Gasoline Octane Needed, a number of these let you use wrist pin offset, Average rate of acceleration from rest to X MPH, Cam duration centerline lobe separation angle from cam events, Cam timing events from duration and centerline, New valve lift from change in rocker arm ratio, Advance or Retard Timing, Read and display information from *.cam files, Convert Airflow to a different depression, weight transfer, center of gravity, ballast placement position and amount, corner weights, percent of weight on each corner/front/rear/left/right, cross weight, cross percentage, lateral acceleration, spring rates, spring movement, spring wheel rates, suspension frequency / cpm / hz, sway bar rates, sway bar movement, sway bar rates, roll stiffness, roll center, roll axis height, roll axis to CG height, roll moment, roll angle, header collector sizing, primary drive, final drive, front sprocket, rear sprocket, converter slippage, 2-stroke port timing, distance, degrees ATDC, duration, boost, transfer, blowdown, dynamic compression ratio, corrected compression ratio, two-stroke, max squish velocity m/s, max squish velocity degrees, squish ratio, squish area, quench / squish clearance, squish volume, bowl diameter, time port open in milliseconds, total port area, port time area, 2-stroke exhaust, single stage diffuser, two (2) stage diffuser, three (3) stage diffuser, expansion chamber, speed of sound, exhaust gas temperature, nitrous jetting, timing retard (degrees), plug heat range change (colder), fuel (gas) jet size, methanol jet size, ethanol jet size, nitrous pressure, specific gravity of gas, analyze flow data, bowl csa, velocity @ bowl, discharge coefficient, Read and display information from *.flw files, and much more. Unit/Metric Conversion. Equivalence Charts.

This program has a 49.95 (US) Dollar Registration Fee. You will get the latest version by e-mail for CD-ROM add Five dollars for Shipping & Handling.

If you would like to order Please download and send in the Order Form with your payment or Ask us about Online Purchasing

If you would like more information about or a Demo Copy Please e-mail us!

System Requirements for CARFOR:   A PC with Windows 95, 98, 98SE, ME, NT, 2000, or XP and 64 MB of Ram. NOTE: Since I do not have VISTA, I have been unable to test the Program under VISTA. I have gotten a report back from one of my customers who says "works great thanks", I also have another person who was able to run the DEMO. You must have a minimum screen resolution of 800 by 600. We recommend 1024 by 768. An Intel Pentium or equivalent processor. For the Graphics Functions, Piston Acceleration / Velocity / Position and, Acceleration and Top Speed Predictions a faster processor will improve processing speed. A printer is optional. The printer is only needed if you want to make a hard copy of a form.

View User's Manual in  PDF Format  1.25 MB   [06-02-08]

Based on Regional Settings in the Control Panel this program displays numbers with support for International settings.





The user can customize the Graph Function.


The user can customize the Draw Function.


The user can customize the help Box.

Select from the built in Trans Gear Ratios or Enter your own.
3.4.3 Added more Transmission Ratios.



The default values for each cell are coded into the program. The program will create a carfor.prm file for you, when you tell it to "Write Parameter File". This means the default values that the program uses once changed can be stored and recalled at a later time. This option lets you call the file whatever name you want, so you can create more than one. When you load the program you can than "Read Parameter File" for the car you want to work on. The user can at any point while running the program Read or Write whatever parameter file they want.
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Each form with all the information on it can be printed.
In version 3.5.1 the Metric Mode was added".

In checking out the forms below Note a cell with a red background is a calculated output. A cell with a yellow background is for user input only. A cell with a green background is used for both input and out based on which command button you click. When you move the mouse over a command button a window shows on the bottom of the form that gives you more information about which inputs are used by that command.

In version 3.4.1 changing to large screen format was added. This enlarges the displayed up to 1600 x 1600.".
In version 3.5.5 support for resolutions up to 4500 x 3000" was added.
This screen shows what large screen looks like on my monitor, set to a resolution of 1280 x 960".

This screen shows what large screen looks like on my monitor, set to a resolution of 1600 x 1200".


This screen was revised in version 3.3.1 adding Piston Flow @ 28".











This screen was revised in version 3.1.1 adding Swept / Cylinder Volume and Quench / Squish Clearance.


This screen was revised in version 3.3.0 added ET Split Times.




This screen was revised in version 3.1.1 adding Swept / Cylinder Volume.
This screen was revised in version 3.5.3 adding Graph CR against Intake Valve Closing for a Fixed DCR.
This screen was revised in version 3.5.6 adding Graph CGP against Intake Valve Closing for a Fixed CR.
Also adding Graph CGP against BP for a Fixed Intake Valve Closing and a Fixed DCR / CR.


This is a new screen in version 3.3.0.


This is a new screen in version 3.5.3.


This is a new screen in version 3.5.6.


This is a new screen in version 3.5.6.


This screen was revised in version 2.8.1 and again in 3.1.0.

This is a new screen in version 3.1.0.

This is a new screen in version 3.1.0.

This is a new screen in version 3.1.0.

This is a new screen in version 3.1.0.

This is a new screen in version 3.1.0.


This screen's user interface was revised in version 3.4.0.


In version 3.3.1 EFI was moved to make it easier to use.


In version 3.4.0 Exhaust was moved to make it easier to use.


This is a new screen in version 3.3.0 / Velocity @ CSA and Discharge Coefficient.
This screen was revised in version 3.3.1 so CSA could be entered in Sq. Inches.
This screen was revised in version 3.4.3 so you could Read and display information from *.flw files.
This screen was revised in version 3.5.3 so you could Enter the Test Pressure at which the heads were flowed.


This is a new screen in version 3.4.0.


This is a new screen in version 3.5.0 and revised in 3.5.2.










This screen was revised in version 3.4.0 adding Graphing of HP and Torque for Road and
ROad HP and letting the user chose if they wanted data smoothing and which method.
This screen was revised in version 3.5.2 letting the user add different HP levels of Nitrous.
They will be shown in the Graphing of HP and Torque and be used in the acceleration calculations.
This screen was revised in version 3.5.3 letting the user slect at what RPM to start the nitrous if using it in first gear.









Revised in version 3.5.2. Lets you see a Graph of the Torque / Horse Power, plus with Nitrous.


Revised in version 3.5.3. To start Nitrous at other than start of run.












This screen was revised 2.10.0 adding unsprung weight and Sprung Weight calculations. This screen was revised 3.0.0.


This screen was revised 3.0.0, .1, .2, .3.


This screen was added in version 3.0.0 and revised in .1, .2, .3.




This screen was revised in version 3.1.1 adding another version of J1349 and also J607.
Also revised in version 3.4.2 adding Bypass Jet Size.


This screen was revised in version 3.4.4 adding the draw check box.








This screen was revised in version 3.4.4.


This screen was revised in version 3.3.0 adding Specific Gravity of Gas.
This screen was revised in version 3.4.0 adding Flow Jet Size to check Fuel Pressure.
This screen was revised in version 3.5.4 adding Flow Jet Size to check Fuel Pressure for Two Stage.
This screen was revised in version 3.5.4 adding Specific Gravity for both Methanol and Ethanol.

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