I did not have a boost leak. Aside from this, ever notice a lot of JWT tuned TT's smoke at the top of each gear?
Diablosport tuned cobras have the same problem, and this is why my tune is faster and more consistent. On Fords, it's simply a cat temp protection that needs to be turned down and a correctly tuned MAF transfer and fuel table. I have not tuned a Z, so I'm not familiar with the logic. There is no excuse for a JWT tech telling me my car should run 9:1 AFR. That's just simply ignorant.