Hi The actual boost goes upto 14 when you are driving and the gauge says 14. Sorry I thought you meant the actual gauge!!! I have just been and seen a man who has had a few. He told me that this is how fast they go. I am just a little disapointed, I thought they would be faster as standard. To be fair my previous car was a 510bhp RS4 and maybe I am comparing to much, even though they are totally different cars.