[bld racing]

Try gapping your plugs at 30. Nitrous creates a lot of cylinder pressure so a good spark is a must. We had the same problem a long time ago and made it go away by closing up the plug gap. If 30 does not work go to 28. If your problem presists you may need to upgrade your ignition. Back when we were running mid 11's, with all stock modified parts we found that 30# injectors with stock fuel pressure seemed to work best. If you run a wet system you can add fuel through the fuel jet. Too much fuel will also create a miss.