Calculated Industries 8703 - Manual (Page 46)

44 — H
OT
R
OD
C
ALC
™
 RPM S 3800.
2. Calculate the HP at 3800 RPM:
 HP MSA 321.966
At 3800 RPM, when your 400 CID engine is producing 445
pounds-feet of torque, it is also producing about 322 HP at the
flywheel.
Estimating Flywheel Torque at a Known RPM
If you know horsepower output at a specific RPM, you can
calculate torque at that same RPM.
In this example, your 400 CID engine produces 366 HP at 5400
RPM. Calculate the torque for the same RPM.
KEYSTROKES DISPLAY
 0.
1. Enter your HP and RPM:
 HP S MSA 366.
 RPM S 5400.
2. Calculate the Torque at 5400 RPM:
 LB-FT MSA 355.977
At 5400 RPM, when your 400 CID engine is producing 366 HP, it is
also producing about 356 pounds-feet of torque at the flywheel.
Calculating Compression Ratio
Compression ratio is the relationship between cylinder volume with
the piston at bottom dead center (BDC) to cylinder volume with the
piston at top dead center (TDC).