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Old 09-30-2019, 10:36 AM   #1
Bob Bidonde
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Default Spark Plug Connectors

I find there are two different lengths of spark plug connectors in the 1930-'31 configuration. Which is the correct one, or are booth authentic for the Model "A"?
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Old 09-30-2019, 10:45 AM   #2
The Master Cylinder
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Default Re: Spark Plug Connectors

It has been my understanding that the longer of the two is for the Model B as the distributor is a little taller. The B distributor is taller to make room for the advance mechanism. Please correct me if I'm incorrect.
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Old 09-30-2019, 11:06 AM   #3
Purdy Swoft
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Default Re: Spark Plug Connectors

I always thought that the longer spark plug connectors were used on the model B . I think that length of spark plugs was the reason for different length connectors . The 3X spark plugs stand taller than the C4 and some other spark plugs . If a TOO short connector is used it will contact the distributor cap body . When the spark plug connector contacts and melts a spot on the distributor cap it can cause a short between number 4 and number 3 cylinders . I prefer the longer connectors because they can be used with shorter spark plugs, model B's and digfferent aftermarket heads with different spark plug spacing .
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Old 09-30-2019, 11:14 AM   #4
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Default Re: Spark Plug Connectors

I also agree with every thing that The Master cylinder said in post number two . I type slow and The Master Cylinder had already posted before I got through typing . Sorry .
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Old 09-30-2019, 11:35 AM   #5
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Default Re: Spark Plug Connectors

According to The Restoration Guidelines page 2-12 Revised 2011:
"The correct connectors from the distributor to spark plugs were stamped from 26 gauge bronze which had a copper color. From the beginning of production through May 1930 the connector ends were symmetrical (rather than offset). A new design was introduced in June 1930 in which the ends were offset (for more efficient use of bronze sheet stock). Both types were 3 1/8" from the center of the hole to the end of the prongs. The spark plug nut was round, knurled brass, 7/16" in diameter and 7/32" high."
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Old 09-30-2019, 12:37 PM   #6
Bob Bidonde
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Default Re: Spark Plug Connectors

A long time ago, Clem Clements asked me about the two different lengths of spark plug connectors, but I had no answer for him. While inventorying my stash of parts, I came across the variations in spark plug connectors, so Clem's question came to mind. Here's your answer Clem, several years later. Thanks Master Cylinder and Cape Codder for the info.
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File Type: jpg Spark Plug Connector A & B Comparison.jpg (8.4 KB, 54 views)
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Old 09-30-2019, 12:44 PM   #7
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Default Re: Spark Plug Connectors

And every one of the repop connectors that I have seen are made of brass and not bronze. You can tell by the "yellowish" color.

Joe B
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Old 09-30-2019, 01:03 PM   #8
Joop
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Default Re: Spark Plug Connectors

Order them at A&L in Connecticut and you get the real ones.
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Old 09-30-2019, 01:45 PM   #9
Clem Clement
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Default Re: Spark Plug Connectors

thanks Bob Bidonde!! I can sleep now!
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Old 09-30-2019, 02:34 PM   #10
The Master Cylinder
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Default Re: Spark Plug Connectors

Quote:
Originally Posted by JoeCB View Post
And every one of the repop connectors that I have seen are made of brass and not bronze. You can tell by the "yellowish" color.

Joe B
Snyder's sells both the brass and bronze.
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Old 10-01-2019, 08:04 PM   #11
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Default Re: Spark Plug Connectors

How about these found on my 1930 Tudor !
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Old 10-03-2019, 06:32 PM   #12
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Default Re: Spark Plug Connectors

Ask before you order the parts.
I only use the correct bronze ones, as the brass is too soft and more likely to come out of place.
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