| 1935ford | -- 05-05-2012 @ 7:06 PM |
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Been attempting to time my 85 hp (with cast iron heads) and cannot get it to "ping" as per the manual. The distributor matches the picture in the manual for a '35. Fuel is approx. 90 octane. Any thoughts? Thanks! - Roger J.
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| 40 Coupe | -- 05-06-2012 @ 3:35 AM |
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The gas back when is not the same gas we have today. For the vacuum adjustment all that is USUALLY needed is to back the bolt out all the way then screw it in about 1.5 turns. If you haven't had the vacuum piston out in a while I would remove the entire top of the vacuum adjustment and pull the spring and the piston out clean and lightly oil both, make sure the piston moves freely and make the adjustment before putting the top back in place. Do not back the center bolt out too far, or damage will be done to the mounting of the disk under the adjustment bolt. This message was edited by 40 Coupe on 5-6-12 @ 3:35 AM
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| Old Henry | -- 05-06-2012 @ 7:02 AM |
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I don't know what your elevation is but at mine of 4,800 feet I advance initial and advance timing as far as possible and never hear a ping until I go down to lower elevations. Elevation and air density makes a difference in the effect of timing advance. Also, higher octane gas such as you are using inhibits pinging. That high octane is not necessary in stock flathead engines with such low compression. High octane is only needed for high compression engines. Our low compression stock flatheads run just fine on the lowest octane available. Old Henry (The older I get, the better old looks.)
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| supereal | -- 05-06-2012 @ 8:55 AM |
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As the others have said, today's gas usually will eliminate ping, even with the advance slider over on the plus side, and the snubber adjustment backed all the way off. That is the way we set them after rebuilding.
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