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Elite Veteran
Posts: 990
  
| I have a '58 Plymouth with the 318/2.
The factory service manual says set the timing at idle to 10 degrees BTDC. Is that WITH or withOUT the vacuum advance hooked up?
(I notice that when I hook the vacuum advance up, it advances the timing another 10 degrees at idle.)
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Expert 5K+
Posts: 7393
 
Location: northern germany | Rob - 2018-02-10 4:02 PM
I have a '58 Plymouth with the 318/2.
The factory service manual says set the timing at idle to 10 degrees BTDC. Is that WITH or withOUT the vacuum advance hooked up?
(I notice that when I hook the vacuum advance up, it advances the timing another 10 degrees at idle.)
then something is wrong. these cars got ported vacuum, so at hot idle, the vacuum port is slightly above the throttle plate. for some reason the fsm calls for vacuum tube disconnected and plugged but if everything is adjusted correctly it doesn't advance timing at idle.
Edited by 1960fury 2018-02-10 4:27 PM
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Expert
Posts: 3775
Location: NorCal |
If the throttle blades are open a little too far at idle, it's possible that there will be vacuum at the timed port at idle so they always recommend that you to remove the tube when setting the initial. |
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Elite Veteran
Posts: 990
| Thank you, 57 Chyzler and 1960 Fury, I'll look and see what could be wrong. It's possible the blades are open a little too far, I will check that. |
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Expert
Posts: 4036
Location: Connecticut | Rob - 2018-02-10 4:02 PM I have a '58 Plymouth with the 318/2. The factory service manual says set the timing at idle to 10 degrees BTDC. Is that WITH or withOUT the vacuum advance hooked up? (I notice that when I hook the vacuum advance up, it advances the timing another 10 degrees at idle.) Disconnect and plug vacuum line at vacuum advance on distributor. Plug the line. Warm engine up so that choke is fully open. Set timing at 10° BTDC at 500rpm.
Ron |
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Elite Veteran
Posts: 990
| Thank you, RonBo97, gonna do that tomorrow morning.
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'58 Plymouth Ignition Timing
