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Torque Converter Slip, Drag.
This program estimates the actual finish line torque converter or clutch slippage in RPM. The
variables considered are: gear ratio, tire circumference (roll out), finish line MPH, and finish line
RPM This program works for both 1/8 mile and 1/4 mile tracks.
Press DRAG FORMULAS, then ConverterSlip to start this program.
Display Example:
== Est. ET/MPH==
Tire…
…Circum? 106.0 (Enter tire circumference inches - not diameter)
Trap MPH? 154.22 (Enter finish line MPH)
Trap RPM= 7825 (Enter finish line engine RPM)
Gear Ratio? 4.56 (Enter rear end gear ratio)
Conv Slip= 829 (Calculated torque converter slip RPM)
Pct Slip= 10.59% (Calculated torque converter slip %)
Run Completer, Drag.
This program will predict what the elapsed time and MPH would have been on a run that was
aborted prior to the finish line. In break-out classes it is common practice to lift off of the throttle
or to brake the vehicle prior to the finish line in an effort to take only enough win light to get there
first and to avoid the possibility of breaking out. This program utilizes the 1000 ft elapsed time,
the 1/4 mile elapsed time, the 1/4 mile MPH from a previous full run, and the 1000 ft elapsed time
from the aborted run.
To use this program for 1/8 mile racing, substitute the 330 ft elapsed time for the 1000 ft elapsed
time, the 1/8 mile elapsed time for the 1/4 mile elapsed time, and the 1/8 mile MPH for the 1/4
mile MPH.
Press ALT, RUN COMP. to start this program.
Display Example:
= Run Completer=
Old…
Part ET? 5.774 (Enter 1000 ft ET from full run)
Full ET? 6.918 (Enter 1/4 mile ET from full run)
Full MPH? 194.30 (Enter 1/4 mile MPH from full run)
New… (Enter to continue)
Part ET? 5.638 (Enter 1000 ft ET from aborted run)
Est ET= 6.755 (Calculated 1/4 mile ET for aborted run)
Est MPH= 198.99 (Calculated 1/4 mile MPH for aborted run)
Standardized Performance, Drag, Full Run Times.
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