Hey, appreciate offering more information on this set-up!
The assumption was that nothing was slipping and that 100% (or close to it) of the power was getting to the dyno...
I give you credit that the graph is really smooth for stuff slipping during the run!
The smooth graph was the reason why I assumed there were no problem...
Hell, even watching the vid, I didn't see no obvious signs of slipage...
Yeah, the power drop had me scratching my head...
I thought for a split second that maybe the turbo (turbine) was too small but dismissed it cause of the total power output.
Hadn't thought that of the wastegate not being able to hold the pressure all the way through - 66mm (Tial?) yikes!
My problem was that I did not have sound when I viewed the video...DOH.
When I tried to punch in the gear ratios for a 4th gear 1:1, it was way over stock redline...another DOH.
With the graph shifted over like that, now the graph makes more sense.
I've got one question, if you don't mind...
How is your intake system designed?
Stock TB with modified stock intake manifold?
Single aftermarket TB with custom runners with everything running through it?
Semi-PP's running through it's own dedicated TB system?
-Ted