Let me throw out a scenario that I'm chewing on. So this car is running pretty good. Still may be a little fat just off idle but not too fat to cause drivability issues. Where its bugging me is at the transition between the end of the transition slots and the beginning of the mains. The larger IAB did help minutely but not significantly. For reference I'm talking the cruise speeds between 50 and 60 mph in the rpm range of 1700-2000 where the AFR peaks at 17 +/- .2 until the mains come in and drop AFR's down into the hi 14's. It's not so bad to cause a major drivability issue but you can feel and hear that she's just not real happy about it (if that makes sense). Now to throw a curve ball. This car has 2 750dp's sideways mounted on a tunnel ram. It's also gasser styled with a straight axle that puts the carbs at a 4.6* angle. That results in one side of the bowl having a higher fuel level than the other. Which would mean that there is different fuel levels at each side of the metering block and with my limited understanding of emulsion would make the pressure differentials different on each stack. Theoretically that could cause one main to start later than the other, or, the transition to end earlier, correct? And if that's the case, it could be a cause of the lean spot. So I'm thinking to test that I could raise the float level and retest to see the effects. Another thought is to experiment with the emulsion stack, moving the jets up or down on one side to put them equally above/below fuel level. Am I making any sense at all?
The emulsion stacks as they are now from the top down:
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Hoping to open up a discussion that not only clean up my cruise but further my understanding.Statistics: Posted by 440Duster — Sun Aug 28, 2022 2:12 pm
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