The fact that it's an air-induced LS1 (meaning no forced induction like a supercharger or turbocharger) doesn't change the fact that this temperature is excessive.
Possible causes for this overheating:
* Cooling system issues: This is the most likely culprit. Check the following:
* Coolant level: Is it low? A leak somewhere in the system could be the problem.
* Radiator: Is it clogged with debris? Is the fan working properly?
* Water pump: Is it functioning correctly and circulating coolant?
* Thermostat: Is it stuck closed, preventing coolant from circulating?
* Coolant hoses: Are they cracked or pinched?
* Faulty fan clutch: The fan clutch might not be engaging properly, resulting in insufficient airflow through the radiator.
* Airflow restriction: Is there anything blocking airflow to the radiator (like debris, or a poorly installed accessory)?
* Engine issues: While less likely, internal engine problems could also contribute to overheating. This might include head gasket failure.
Do not continue driving the car at this temperature. Prolonged operation at 225°F can cause serious and costly engine damage. Have the cooling system thoroughly inspected and repaired by a qualified mechanic as soon as possible.