How to tell if a turbo is good?

When it comes to assessing the quality of a turbocharger, it's crucial to consider several key factors. Firstly, the visual inspection is paramount. Look for any signs of wear, damage, or leakage from the housing, impeller, or seals. Secondly, check the turbocharger's operating efficiency. This can be done by monitoring the boost pressure and spool-up time. A good turbocharger should provide consistent and adequate boost with minimal lag. Furthermore, listen for any abnormal noises during operation, which could indicate internal damage or wear. Additionally, consider the brand and manufacturer's reputation, as well as any warranty or service support. Finally, seeking professional advice or having a qualified technician inspect the turbocharger can provide valuable insights. In summary, a thorough visual inspection, efficiency check, noise analysis, and brand evaluation are key to determining if a turbocharger is good.