Originally Posted by
grip grip
I don't follow the reasoning behind machining the CP down, as that would decrease boost.
Correct. Thats actually my point. It seems as tho when stacked 65/178 ur gonna get 22+ psi at a minimum. But for those that wanna stick with a 65mm (rather than turning down oem to 70mm), they could turn down the CP to be around 18-20 psi.