#90776, "RE: More Turbo Questions" In response to In response to 5
I have a 60mm tb, extrude honed mani, and atx just like you...and also a small boost leak and @5 psi my track time was high 15s. I still have a lot of tuning to do and hopefully things go better with my car...but yeah, I would recommend getting a bigger tb because I rode in my friend's turbo atx with a stock tb and mines was definetly more responsive.