MOSTLY SUSPENSIONS
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The following is for the dragracers. It's an acceleration program which delivers all the information you normally receive on your timing slip. Just fill in the form below and click on "Display."
 
Calculations are made every foot. A "nominal" torque curve is skewed and factored to match the input data. Equivalent weights of rotating inertias are approximated.

While the calculated speed should be quite accurate, the many variables which affect elapsed time cannot be adequately covered here. The calculated elapsed time, therefore, should be used only for comparative purposes. In other words, use differences in elapsed time when evaluating different gearing, different shift points, etc.

QUARTER MILE PERFORMANCE

Change the following information to fit your car. When you press the "Compute" button, the quarter mile speed and elapsed time will be displayed below.

When inputting transmission gear ratios, simply repeat the last valid ratio to complete all six form spaces.

The answers are displayed when a tire type selection is made. It is necessary, then, to repeat the tire type selection after a change is made in the spreadsheet.

TIRE TYPE

street
DOT "slick"
race slick

SPEADSHEET

engine rpm at rear wheel power peak =

maximum rear wheel power =

effective tire radius =

car weight =

axle ratio =

maximum engine rpm (shift rpm) =

number of transmission gears =

first transmission gear ratio =

second transmission gear ratio =

third transmission gear ratio =

fourth transmission gear ratio =

fifth transmission gear ratio =

sixth transmission gear ratio =

ANSWERS:

Quarter Mile SpeedQuarter Mile ET
Eighth Mile SpeedEighth Mile ET
60 Foot Time0 to 60 Time
Flywheel HorsepowerFinal RPM