Do you wish to have the ability to calculate CR and gas octane needs of engines and/or the gear ratios vs. tire diameter, RPM and MPH, or even the HP your engine is making when you know the 1/8 or 1/4 mile ET or vice versa on your own computer? I offer a ratio program written in Turbo Basic that performs all of these tasks "FAST".
The CR program allows you to enter by prompt; the bore in mm, stroke in mm, piston notches (if any) in cc, deck in inches, and head cc. It also prompts you to calculate what head or deck is needed to achieve a specific compression ratio. That's right, it figures it out and tells you what it takes so you do not need to keep calculating to get to a specific number. It calculates engine size in cc and cu. in., deck volume in cc, CR based on your entry and gives the mathematical octane requirement for the engine to live its longest. If using a Semi-Hemi cut head you can run 0.3 CR higher than this program tells you to use. You may then select by menu to return to a new deck or head calculation for the same size engine or from a new size engine.
You can also select from the menu to enter the gear ratio chart calculations. The gear ratio prompts you, "Do you know the ratios already or do you need to input the actual tooth count of the gears?" If you need to input the tooth count it calculates the ratios of R/P, 1st, 2nd, 3rd, and 4th. It lists them on the screen so you can enter them at the prompt. You then enter as asked for; R/P, 1st, 2nd, 3rd, 4th, tire height, start chart RPM at, choice of 50, 100, 200, 300, 500 increments, and ending RPM of chart. The screen chart can then be used to see what the RPM drop is from gear to gear or the chart can be printed.
Next, we have added the ability to do drag race calculations for both the 1/8 and 1/4 miles. You must know either the HP or the ET of the car and the weight of the car as it is raced with the driver. If you know the ET and weight it will tell you what your engine is making for HP. Naturally, the program was designed for proper gearing to take advantage of the engine's power. Readings will not be as accurate without close ratio gears.
All of these programs can be printed out on standard size printers (80 column). All instructions are included to get it up and running on the label and the READ.ME document file on the disk. Developed by Bill Greenwood and Gene Berg.