Jack dude - I understood it the first time. I'm just a transplanted Ford guy trying to learn his new GM. To aid my understanding, I establish the baseline w/ the stock setup. I was drawing from a shakey memory on the stock boost of the '04 GP. It looks like it's 9.5 psi (not 10) and the compression ratio is pretty conservative at 8.5:1. Pretty safe setup.

So you're saying that the 3.4" pulley increases boost about 3.5 psi (lost boost w/ freer flowing exhaust noted), and Zach says it will run OK without recalibrating the PCM, but probably better with recalibration. Thanks for catching me up on the mods. It would be nice to know what the pulley and CAI translates to in whp numbers. It's nice to kow that simple bolt ons that make a good difference are available.

Here's the stock numbers from C&D:

ENGINE

Type: supercharged V-6, iron block and heads
Bore x stroke: 3.80 x 3.40 in, 96.5 x 86.4mm
Displacement: 231 cu in, 3791cc
Compression ratio: 8.5:1
Engine-control system: GM with port fuel injection
Emissions controls: 3-way catalytic converter, feedback air-fuel-ratio control, EGR
Maximum boost pressure: 9.5 psi
Valve gear: pushrods, 2 valves per cylinder, hydraulic lifters
Power (SAE net): 260 bhp @ 5200 rpm
Torque (SAE net): 280 lb-ft @ 3600 rpm
Redline: 6000 rpm