PTE 6766 fitment
 

So I'm currently running a turblown td61 on a xs engineering(hks) cast manifold on my FD, and I found a good deal on a PTE 6766. I'm wondering if any one has ran this combination and if there's going to be enough clearance to fit the larger turbo? Thanks Bob

It will fit. However what exactly is the intention on going with a larger turbo ? Most people will never need a turbo bigger than what you have. Your current unit will make near 600rwhp, with a very wide powerband. So unless you have a widebody or drag radials/slicks it's going to be pretty hard to hookup on the street.

I'm currently running 20 pounds of boost on 93 pump with 50/50 water methanol injection on a conservative tune and the car is a lot of fun. My buddy just got done building an 03 Cobra and made 720 rwhp, so of course I'm trying to keep up with him again. I'm not sure how much power is left on the table with my current combination, or if I needed to step up to a larger turbo?

You should move the turbo up to 30 psi and if that is not enough power go bigger.