Quote:
Originally Posted by Formulajones
Note: You don't set your Total Timing with vacuum hooked up. "Disconnect the Vacuum advance"
HOW TO SET UP YOUR DIST. WITH ALL-IN TIMING. EXAMPLE:
When you want to make your own "All-in" Timing CURVE, BEGIN WITH Doing this, by revving the engine up until all your advance is at your choice degree (example: 32-34 degrees BTDC.) move to the highest number that the dist. will keep increasing to a higher numeral and then back off some, NOW set the Total Timing of your own choice, your total. This assures that Total Timing, under wide open throttle, doesn't exceed a certain number that you're after. Vacuum Advance is inoperable under wide open throttle, so it's "not" a player here.
Most likely 38-39 will be too high for Total Mechanical Timing in a pump gas deal like yours. You may end up more in the 32-34 * range.
Only after this is set properly will the Vacuum Advance be hooked up and dialed in, on top of your total. Usually, you will end up with maybe 10-12 degrees, additional, that should put you around 44-46 degrees, which is only in play at light throttle cruising. With that done, your initial should be somewhere around 12 degrees, if the distributor is set up properly.
You likely won't come close to hitting these numbers or anything resembling these numbers without modifying the breaker plate and welding things as cliff mentioned.
For this I'd recommend you send the distributor out to a qualified individual.
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I Plan on using this Dist. for now, we are now timed:
6* BTDC. Initial @ 700 RPM and 9" HG.
40* BTDC. All-in @ 2250 RPM and 21" HG.
"These settings are with the Vacuum advance Hooked up"
Here is the curve:
RPM Degrees BTDC. HG
(1) 650-700 6 9
(2) 1000 18 13
(3) 1250 26 14
(4) 1500 30 16
(5) 1750 34 18
(6) 2000 38 20
(7) 2250 40 21
(8) 2500 40 22
(9) 3000 40 22
Please modify this message to suit even more than I modified it. The reason is I added and changed your formula by using material in my mind that may not be correct, so you get the final say so. I tried to make this easy to read for the future so that there is no guess work. Mike OUT.