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02-25-2024, 01:27 PM | #21 | |
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Re: Rotor position at TDC
Quote:
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JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan Last edited by JayJay; 02-25-2024 at 02:19 PM. |
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02-25-2024, 01:48 PM | #22 |
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Re: Rotor position at TDC
Easy way to find your compression stroke is to just put a finger over the spark plug hole while you are cranking the engine over and when you feel pressure increasing, you're there. Now look in the hole as the piston comes up, and start using the timing pin. When the pin drops in the detent, stop and set your point cam.
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02-25-2024, 02:20 PM | #23 |
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Re: Rotor position at TDC
Dan, Well said it really is that easy!
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02-25-2024, 04:31 PM | #24 |
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Re: Rotor position at TDC
Try using a stubby phillips screwdriver in place of the pin.
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02-25-2024, 05:31 PM | #25 | ||
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Re: Rotor position at TDC
Quote:
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JayJay, Please read what I was referring too. Regardless if you use the Nurex tool or not, you can not just lift the distributor and turn it 180°! Last edited by Y-Blockhead; 02-25-2024 at 05:36 PM. |
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02-25-2024, 06:23 PM | #26 |
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Re: Rotor position at TDC
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JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan |
02-25-2024, 06:42 PM | #27 |
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Re: Rotor position at TDC
Some of the cam gears don't have a very deep dimple. After I locate the dimple I use a small mirror and flashlight to see if the dimple is perfectly in line with the pin hole.
Alway's remember to install and snug the pin at this point. |
02-25-2024, 07:39 PM | #28 |
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Re: Rotor position at TDC
Good input group, thx....am making progress here.
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02-25-2024, 08:12 PM | #29 |
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Re: Rotor position at TDC
I have left the pin there too many times, but luckily it fell to under the radiator, so I painted it gold to try to remember to screw it where it belongs.
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02-25-2024, 08:14 PM | #30 | |
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Re: Rotor position at TDC
Quote:
I found the scale VERY useful timing my diamond B engine fitted with an A distributor. I found the dimple using the pin (and B timing cover) but I didn't mark the pulley at zero. I marked it at 19° advanced, then turned the motor back to where that mark was at the zero mark (the engine was now at TDC) and set the timing in the usual Model A way. Perfect!
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02-25-2024, 11:55 PM | #31 | |
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Re: Rotor position at TDC
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I actually set my timing a little after TDC because I have a Nurex Auto Timer and I want to limit total timing to ~30° BTDC. |
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02-26-2024, 06:07 AM | #32 |
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Re: Rotor position at TDC
I’ve done the same, but my pulley flange is too narrow for a mark, so I filed a small notch.
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02-26-2024, 08:15 AM | #33 |
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Re: Rotor position at TDC
Y-Blockhead, is that sexy looking fan belt noisy?
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02-26-2024, 09:32 AM | #34 |
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Re: Rotor position at TDC
Years ago I forgot to refit the timing pin . After a short drive the engine was well covered in oil . I was amazed at how much oil had come out of that tiny hole !!! The pin was lost on the road somewhere .
John in sunny Chandler AZ . |
02-26-2024, 10:17 AM | #35 | |
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Re: Rotor position at TDC
Quote:
I originally installed it because with the thicker Murrey Horn Harmonic Balancer I could not fit the stock type belt between to pulley and the frame. An added bonus is that they can be shortened so you can bypass your water pump or generator if you lose a bearing while out on the road. Until you can get to a place to repair or change them safely. (I have never had to test this tho). |
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