Originally Posted by Mike@GTM

Looking at the graph, I'm not terribly shocked by the difference in torque/power vs. boost. Generally, for a given turbo setup every psi will give you anther 10hp or so (all things being equal). Since you didn't quite hit that, it is apparent that the exhaust is holding you back. The torque and power curves really show that.

As far as .86 vs. .64, I'd wait until you've done the 3" cat-back. Once you've opened up that exhaust, you will see a huge difference. Seriously.