Calculate coolant bypass flow through the engine when the thermostat is closed, ensuring proper block circulation.
Input Parameters
Results
--
Bypass Flow Rate
GPM
--
Bypass Percentage
%
--
Bypass Velocity
ft/s
--
Block Circulation
Note: The bypass circuit allows coolant to circulate through the engine block when the thermostat is closed, preventing hot spots. Too much bypass slows warm-up; too little causes localized boiling.
Reference
Bypass Area = π × (D/2)²
Bypass Flow = K × Area × √ΔP × 10
ΔP ≈ System Pressure × 0.3
Bypass % = Bypass Flow / Total Pump Flow
Target bypass: 10-20% of total flow