Originally Posted by Ian0611

My dyno graphs were looking the exact same way for a while and it turned out to be a couple of different things. One of the problems was that I did have a small boost leak, however my graphs were still looking like that even after I fixed it. The real problem ended up being the boost tables in my tune. I thought I had them dialed in but apparently they needed more fine tuning. Keep in mind that I'm using ECU controlled boost with a modified stock boost solenoid so I'm not sure how much those tables affect an MBC. I'm sort of a newb in that area cuz I've only been tuning my car for a few months now and ECU controlled boost is all I've ever had. So based on what little I know I'm thinking there could still be an issue in your tune that's causing the problem. Could also be your clutch like someone else suggested.

Originally Posted by kyooch

thanks - the clutch is brand new so i'm thinking it may be the tune. we'll see how it goes! Thanks

Originally Posted by Ian0611

Yeah again I'm not real familiar with tuning MBCs but for my setup I made some adjustments to the Boost Error Correction Table and the Max Wastegate Duty Cycle Table and I was able to get a much smoother graph and more power. The weird thing about it was that I found that making adjustments in the upper rpm ranges helped smooth things out in the lower ranges. I didn't believe it at first so I tested it out a few times and sure enough I'd make changes to the MWGDC around 6000rpm and my dyno graph would get smoother or choppier around 3000-4000rpm depending on the setting at 6000 I don't really understand why it was working that way I just know that that's what it was doing and I have logs to prove it in case someone thinks I'm off my rocker and I don't know what I'm talking about.