2059
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Over the past couple weeks been following a thread about ported vs. manifold vacuum as it relates to emissions, performance, application, etc. one of the posts talked about engine cooling at idle and another about tuning carb(s) and setting idle; both of which I was having issues. So, after reading everything that Hemirunner, Meep-Meep and 383man along with others; i finally had some time and a spare Distributor to give it a go.
I talked to the engine builder and he said he "never uses the Vac. Adv.. Disconnect it." which is what Hemirunner said. Here is what I started with;
MoPar electronic ignition dist.
10* BTDC Initial
Full mechanical adv. ~20*
Couldn't get the engine to idle below 1200 rpm and was running on the warm side. One notch below "HOT" on the guage.
Started with the stock dist. drilled and "pinned" the vac. adv. plate. (the screw was a little close to the mechanical advance so I cut it and reinstalled)
Removed the vac. adv. can.
Made a cover plate and fashioned the Dist cap. tyne. (yes, I said Fashioned).
Adjusted the mechanical adv. to give 1/2 travel.
set the initial timing at ~28*. Which gave me ~38* @ 3K rpm.
Result... Idles much cooler and was able to get some adjusting on the carbs done. No test drive; Raining... Again...
yes; there are pictures. here ya go...
I talked to the engine builder and he said he "never uses the Vac. Adv.. Disconnect it." which is what Hemirunner said. Here is what I started with;
MoPar electronic ignition dist.
10* BTDC Initial
Full mechanical adv. ~20*
Couldn't get the engine to idle below 1200 rpm and was running on the warm side. One notch below "HOT" on the guage.
Started with the stock dist. drilled and "pinned" the vac. adv. plate. (the screw was a little close to the mechanical advance so I cut it and reinstalled)
Removed the vac. adv. can.
Made a cover plate and fashioned the Dist cap. tyne. (yes, I said Fashioned).
Adjusted the mechanical adv. to give 1/2 travel.
set the initial timing at ~28*. Which gave me ~38* @ 3K rpm.
Result... Idles much cooler and was able to get some adjusting on the carbs done. No test drive; Raining... Again...
yes; there are pictures. here ya go...
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