jonbill wrote: ↑Sat Jul 29, 2023 2:25 pm I've moved this thread to user projects.Thank you. I could have just started a new thread, but this keeps everything in one place and gets the extraneous crap I've posted out of the Getting Started forum.
apollard wrote: ↑Sat Jul 29, 2023 3:53 pm Disable fuel pump and check timing while cranking. No need to have it idling to make sure of trigger angle and timingEven with a dumb distributor controlling the timing with centrifugal & vacuum advance mechanisms? The only thing Speedy is doing right now is telling the ignition when to fire, the ignition tables and advance are all zeroed out.
Installation value of ignition distributor at starting speed without vacuum: 10° before TDCI don't see how I can set anything more than the installation value without the engine running, fuel pump connected or not. Setting the distributor to 0° at TDC, while not correct, is the best I can do with the factory mark on the harmonic balancer, and will let me get the engine started and idling well enough to put the tach/dwell meter and advance timing gun on it and properly set the timing to spec.
Adjusting value of firing point with vacuum at idle: 10° before TDC
Test values ignition timing without vacuum, 1500RPM: 15-20°, 3000RPM 27-32°
Vacuum adjustment in direction of "advance" 4500RPM: 6-10°
Dwell angle at idle: 47-53°, change between idle and 3000/min: max ±3
Conventional tools: revolution counter, dwell angle measuring instrument, stroboscope
Installation value of ignition distributor at starting speed without vacuum: 10° before TDCwhen cranking. So, kill your fuel pump (pull the relay or wire) and crank the engine to check timing at 10°. Reconnect fuel, start, and go from there. You cannot correctly check the other distributor spec's with such a high idle and poor vacuum (MAP). Your idle should be much lower when idle is tuned well. Search for how to tune warm idle and other steps after. Once idling well at normal rpm and timing, then do the other distributor timing checks.
I've managed to dig up a few obscure wiring diag[…]
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