So how do you know what your boost is supposed to be set at, without looking at the wastegate rod, or posting a picture of it? If it's set at about 15 psi, but you're not achieving it, THEN you have a boost leak. But you don't have a boost leak if all you're getting is 13, because your wastegate's set at 13 lol. Check that first. Don't worry about spinning tires. It's loud, obnoxious, and it ruins stuff. Most importantly it helps you lose races lol. Get that fuel pump with hot wire kit, then start looking at what your wastegate rod's set at. If you can confirm it's setting, THEN you can confirm what reading's coming up on the gauge. Though, what helped my car spin it's tires, (it was just an experiment) was a dump pipe. Even though I had intake and exhaust mods, my car was a totally different animal with the dump open. Totally. Though before you find a D5 converter and yank everything apart, a cheap way would be indeed to throw a boost controller on there, and a dump pipe lol. I actually have a steel one that was on my car I'd send you for the price of shipping lol. Just so you could experiment like me lol.