So I installed my ZEX dry kit a couple weeks ago but just got around to getting the bottle filled and testing it last night. I took it down the road next to my house in second gear and sprayed it from 3K - 6K rpm's and then shut it down in the driveway to read the plugs. Checked plugs 1-4 and they were all fine, running a little rich but that's ok with me. Then I went around to the driver side plugs and 5, 6, and 7 all showed what looked like the rainbow colors on the ground strap, which indicates a lean condition. Plug 8 was neither lean nor rich. Some Fact's about my N2O kit.... 1. I am using the jets for a 75shot and this is a dry kit, 2. Running Autolite 24's gapped .44 which is -.10 from factory, 3. As far as I know the timing is set at factory settings. What would cause one side to run lean and how can I correct this? Should I run the plug gap down some more? Say to .40 or .35? Please chime in if you have experience tuning Nitrous!!!! Thanks!