My only trip to the track was untuned (same boost level as now, just less timing and richer then). I went 98.X. I believe with the extra timing and having the a:f dialed in I should have picked up another mph or 3.
Murdock, make sure you swap the hotside out if you cross that 30 psi mark. Ported head or not, log manifold or tubular, you will lose boost with RPM on the .63 setup. Enjoy that 5858, it's an awesome turbo!
PTE 5858sp @ 24psi - Supporting Fuel - Stock internals
Contact Duster360 and Turbo666 for Diablosport tuning.
Ooooooh I get what your saying, because you don't drive it everyday means a:f's in the 16s are safe. My mistake...