"Popping on the over-run is usually unburnt fuel exploding in the exhaust."
Yes, that sounds feasible. I need to tune the carbs better. I believe that may be right with the mixture not being perfect. I tried the Colortune, but didn't get far since sunlight was gone fast with our switch out of daylight savings time. Then it isn't the distributor and cables?
Is there an issue if the engine doesn't heat up enough even after an hour of driving? I fear I don't have the gas/air mix perfect, so perhaps the engine doesn't warm up enough. I only noticed it this past weekend when it was in the 50s (F) and testing the car. Of course during the summer it was always hovering around the middle of the dial. Now it doesn't seem to reach the middle. Is that a bad thing? Or a good thing?
