Hello everyone, I have a 4327s Carter on my 68 GTX low performance 440. I get great 13:1 afr idling. Acceleration it’s 11:1-12:1. But cruising is 10:1, I don’t know much about tuning carbs, but I do know 10:1 is little rich. I pulled #3 and #8 plug out to confirm it, here’s what they look like
The carburetor is a 3 step rod carb, it has .089 jets in the primary, I guess I should have looked at the secondary jets while I had it apart lol. And it has .065x.062x.053 metering rods.
Suggestions are greatly appreciated! And let me know if I need to give more information!
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