I have a monster gt 4.6. I have just completed the engine break in and am "tuning for performance" now. Im following the directions in the manual. Ive got it almost dialed in but when I open the throttle from a dead stop, it accelerated great for about 5 to 10 feet then bogs and will die unless I let off the throttle. Its not an instant stop, more like a bog that gets worse (1 to 2 seconds from bog to engine cut off) until it shuts off UNLESS i reduce the throttle. The stock setting is 2 3/4 turns for the high speed and 6 1/2 turns for the low speed. It seems af if I have adjusted each needle almost 1 to 2 full turns in each direction with no change in the bog. Is this a high speed needle or low speed needle problem? It seems like the engine tacks up before it bogs but Im nowhere near 2nd gear. UGH!
Also, Ill note that the engine is running between 190 and 220, there is some white smoke but I dont know if its more than average or less considering this is my 1st nitro vehicle.