Posted By: fig426
Help with spark plug heat range. - 04/30/09 12:51 PM
The T/A is running almost perfect but still needs a little tweeking. My ET is down to a 12.78 at 109.49 mph with a 60 foot of 2.02. The 2,8,1,7 plugs look awesome! The 4,6,3,5 plugs look a bit rich. It's a 6 pack set up and I'm thinking the distribution the manifold gives is what's giving the cylinders different amounts of fuel. Or is it one of the carbs doing it? The question is........... I'm running NGK5672A-8 plugs and was thinking about putting a hotter plug in the 4 holes that seem richer. Will this help anything or is mixing plugs tabboo?