* Engine modifications: A stock 350 will require a smaller radiator than a heavily modified 350 with high horsepower and high RPM capabilities. Forced induction (turbocharger or supercharger) dramatically increases cooling needs.
* Climate: Hot climates require larger radiators.
* Driving conditions: Frequent stop-and-go traffic generates more heat than highway driving.
* Type of radiator: Different radiator designs (copper/brass, aluminum, etc.) have varying cooling capacities.
* Cooling system components: The efficiency of the water pump, thermostat, fan, and hoses all impact the radiator's required size.
To determine the appropriate radiator size, consider these options:
* Consult a radiator specialist: A local radiator shop can assess your specific engine setup and recommend the right size and type of radiator. This is the best approach.
* Use a radiator sizing calculator: Several online calculators exist, but they require accurate input of your engine's specifications and operating conditions. Accuracy depends on the information you provide.
* Look at similar builds: Research online forums and build threads for similar 350 Chevy engine setups. Pay attention to the radiators used in successful builds, but remember that even similar setups might have different cooling needs based on location and use.
In short: Don't rely on a single number. Seek professional advice or thoroughly research similar builds *before* purchasing a radiator. Underestimating cooling capacity can lead to overheating and engine damage.
