I've got a 421 cub with 39mm pwks with a .109 main timing a +8 with 17cc shelf domes. I've got a digatron on the bike and still only getting to just under 1000 degrees with the pj's closed. I'm just curious to how small some of your guys main jets are to achieve that 1100 to 1300 egts. My plugs are still not even showing a heat mark. I went down from a .116 to a .109 and only picked up 70 degrees egts.