I have an OS TZ and I usually run it at 2 1/2 turns out on the HSN. I'm currently using the following, O'Donnell 20% fuel, OS #6 plug, and the OS 1040 pipe or the Skyline pipe. This weekend when using the Skyline pipe I adjusted the HSN to 1 3/4 turns as mentioned in this thread and the temp went to 333 F. Normally the temp is in the range of 220F to 240 F at 2 1/2 turns. Is this temperature normal at this needle valve setting?