What is A/R on a Turbo and Why Does It Actually Matter?
If you've spent any time looking at performance parts or browsing through a Garrett or Precision catalog, you've probably wondered what is a/r on a turbo and how those little numbers actually change the way your car drives. It's one of those specs that sounds incredibly technical—like something you'd need a physics degree to understand—but in reality, it's a pretty simple concept that has a massive impact on your powerband. ...