So I am helping Jon Kilgore get his troubling TSIO-550E (Barret built motor) to run properly.  They had turbo problems which were partially to blame from worn through scat tubing that was routed to the coffee can.  

On a test flight the high pressure fuel flow was at 51.4 gph, way too high above the recommended 43.3 in the M-0.  During the takeoff the engine was surging from so much fuel being fed to it that I reduced the mixture and the plane flew much better.  We backed the high pressure fuel flow down and subsequent flights were better.  However, on multiple takeoffs the MAP and the Fuel Flow would decrease on each takeoff.  I reviewed the data each day with Bob Pastusek, but could not find a culprit.  We decided to hook up the fuel setup kit and start with the basic low by pass unmetered fuel pressure and then the idle mixture rise.  The pressure was a few psi low, but the idle mixture was over 200 rpm rise before the engine quit!!!

Next flight with a series of takeoffs; same thing in decreasing MAP & FF; you cant be serious?  So another conference call with Bob and that left him with him head scratching his head. So now I phone a friend at Continental Motors, Bradley.  He says to check the upper deck pressure lines.

So we un-cowl the plane and found a loose upper deck pressure line going to the waste gate controller.  It was barely attached to the fitting and likely installed (sort of) by the company that installed the turbo chargers.

Recommendations, any work not done by you should be checked by you!