Input Parameters

Results

--
Thermostat Rating
°F
--
Full Open Temp
°F
--
Est. Heat Load
BTU/hr
--
Bypass Flow (closed)
GPM
Note: Modern engines use 195-210°F thermostats for emissions efficiency. Racing engines often use 160-180°F for detonation margin. Jiggle pin/bleed valve prevents air pockets.

Reference

Heat Load ≈ HP × 2545 × 0.33 (BTU/hr) 33% of fuel energy goes to cooling system Thermostat opens at rated temp Full open = Rated + 15°F Bypass flow (closed) ≈ 15% of total flow