[QUOTE=fyrstormer;14185183]I run Spektrum radios.

Good radio. But its not Futaba or Airtronics/Sanwa. Futaba & Airtronics/Sanwa has Speed of Throttle, That will get the bogging disappear. Adjusting the LSN can get the bogging out. See what I mean, The fraction in time you eccelerate, the bog or flatspot cause a lean condition. You want the LSN to be rich for that fraction. When you turn the LSN CW, idle speed will rise, showing you your leaning it out. How many seconds off idle to Idle speed it takes to set idle speed? 5 or more seconds? Too lean if it take that long. I found that the P-0 engine does better when it drop down right away, and slowing down the speed of throttle on my Airtronics M8 radio system. M8 is correct, P-0 out when, ten yrs ago, more or less. All my model, Serpents, Xray, 8th, 10ths & 12th run on M11. Xray NT18 P-0 the only one on the M8, since the class died down.