Calculated Industries Hot Rod Calc 8703 User Manual page 52

1. Enter your Stroke and the RPM for which you want to determine
piston speed:
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2. Calculate the Piston Speed at 4000 RPM:
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Repeated presses of [Piston Speed] will toggle through the inputs
and outputs, starting with the entered Stroke.
At 4000 RPM, that is a piston speed of 2,560 feet per minute or
about 707.1 meters per minute. What about at 5000 RPM?
3. Enter the RPM for which you want to determine piston speed:
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4. Calculate the Piston Speed at 5000 RPM:
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At 5000 RPM, your piston speed is 2,900 feet per minute and is
pushing the edge of what modern metal materials can handle,
even in short durations.
Your Hot Rod Calc can also calculate an RPM limit should you
want to calculate a limit based on a particular piston speed.
Calculate an RPM with a Piston Speed of 3500 feet per minute and
a Stroke of 3.48 inches.
KEYSTROKES
5. Clear your calculator:
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50 — H R
OT OD
C ™
ALC
STROK S 3.48 IN
RPM S 4000.
FPM 2320.
M/MIN 707.136
RPM S 5000.
FPM 2900.
M/MIN 883.92
DISPLAY
0.