The pipe was rubbing up against the frame. I guess it just did that for so long that it wore a hole in the pipe.
I actually hadn't done a boost leak test before now. Just never got around to it. And the boost leak test is how I finally found the problem. I suspect this has been there since before I bought the carf and that is why my dyno numbers were so low.
Lesson learned man always boost leak test first. You have a scan gauge so you should be able to at least watch what the MAP sensor is seeing and compare to the boost gauge. So you can look at pressure at the begining at the end of the tract and that would have been a tell tale sign of this giant hole. But nothing replaces a good boost leak test. So in the future when you hear hoof beats you need to think horse not zebra.
Yeah, definitely lesson learned. I only had the scan gauge for about a week before the boost leak test, plus I wasn't sure how it worked at that time.
Wow -- now that's a boost leak. :band: I hope you're feeling back in the saddle again once that gets taken care of. :thumb: