Stupid Distributor Questions

3404spdvaliant said

Yea, and it's lean yet you say to hook up the vac advance knowing it'll add timing to the mix and make the condition worse.
I say set up the distributor with out vac advance then fix the carb and after all that, then experiment with your gas mileage canister.



Lets put our heads together on the same page.

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Yes the carb is lean but we`re addressing that as well as getting vacuum advance out of the idle circuit. There are several things that need to be tweaked here. I mentioned that the plugs are too hot , an Autolite 63 would be a better choice. George has the timing up to 38* now ,which for a stock 340 is too much even with good gas. I suggested bringing it down 4* and running at least 93 octane gas. 34* timing may be too much yet, it may have to come down even more if spark knock persists. All of these things will help alleviate the lean condition. These cars stock are meant to run with only 5* initial advance and pick up only another 12* mechanical by 2000 rpm. The vacuum advance will give just enough advance at low rpm to help with bogging and won`t matter at WOT. The car`s a stock 340 and should drive like a street car. I`d like to see George put a good electronic ignition on the car but I know he`s fighting it in an interest to keep things (at least) appearing stock. (Hear me George? Lol!) Another way to go about things would be to start with stock specs and go from there. Champion N9Y plugs with 5* BTDC initial timing ,11.5* mechanical advance @ 2000 rpm, and 8.5* vacuum advance @ 10.5 inches. Your advise is good 3404spdvaliant and I`m sorry if my suggestions clash with yours but we`d both like to help George, we`re just going about it in two different ways.