Οκ so I just got hold of a nice clip from my last race...Taken under considaration that I had a 1.5 inch hole on my silicone hose from my turbo to my intercooler ( I found this out after my race ) resulting in a poor 13psi from 25psi and that I did not even have a DOT drag radial tyre 12.5 doesnt sound so bad...Enjoy the clip

https://www.youtube.com/user/autokinisimag