What is the compression supposed to be on a 4.6 northstar engine?

The compression ratio for a 4.6-liter Northstar engine, commonly found in Cadillac and some other GM vehicles, is typically around 10.3:1. This ratio can vary slightly depending on the specific model and year, but it generally falls within this range. Proper compression is essential for optimal engine performance, fuel efficiency, and emissions control. Always refer to the manufacturer’s specifications for the exact figure for your specific engine model.