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ch1929

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    AC E9 18mm Spark Plug - What does it fit?

    in Technical

    Posted

    10 hours ago, Hans1 said:

    AC E9 spark plugs apparently went thru different stages of build.

    As I have learned, ( just a little ) older plugs were designed so that a nonreader could compare pictures/shapes to identify replacements.

     

    Early AC  E's had a brass cap with removal straight porcelain, locked in place with nut,  and a single Fluit radiating from base.  

    Later they removed brass cap and added ribs to porcelain, still with a form of Fluit on base.

     

    Later, like your picture, the cylindrical base had differing lengths of base material. Yours being in the middle of heat range.  Also referred to as SAE Regular in my material.

     

    /////////////////////

    E types,  7/8 thread with 15/16 SAE.  NOT 18 metric

    Heat ranges offered   4 1/2, 6, 8, 9, 12, 14

     

    ///////////////////////////////////

    My  info is limited but here are vehicles using AC E and AC E9 plugs.

    From the charts the letter E  seems to be changed to the E 4 1/2 to E 14 heat ranges.

    These are 7/8 thread, NOT 18 mm thread.

     

    Apperson 8 cyl  E

    Durant  75, 66, 65, 60, 55, 40.  E

    Falcon Knight '27  '29 inclusive   E

    Gardner '28 '29,  except 1930-31.   E

    Lexington all models  E

    Marmon model 78  specified E9.   Also, E, all thru 1926 included with old head.

    Oldsmobile 1927   E

    Reo 1927sterns Knight 1930    E

    Studebaker  some models     E

    Willis Knight, all but Series 86.  E

    //////////////////

    Other uses may be found, a cross reference for E9 showed   Champion AB-44, .Champ 6, and C-4.

    I hope this is a little helpful.

    Thanks Hans! I do appreciate the information. 

    AC E9 18mm Spark Plug - What does it fit?

    in Technical

    Posted

    57 minutes ago, PFindlay said:

    There is no mention of any E series of plugs in either the 1951 or 1970 catalogs (Canadian).  But I picked up this list somewhere on this forum, I think.  It is probably from the 30s and seems to indicate a type E plug.  Maybe this will help.  Peter

     

    ACPlugs.jpeg.3d7c2de19385a08b692b911fe5fd443b.jpeg

    Thanks Peter! I did see that picture in a previous post, I wish I had a copy of the folded page 96 showing the Types. If the plug is an E Type I would guess the number would be the heat range, although the picture does not show any numbers after the E

     

     

    ECO AIR flator values

    in General Discussion

    Posted

    On 10/13/2023 at 2:45 PM, dalef62 said:

    Parts sold for about $800, Airflate was a no sale at $1500, but I did start it at $2500 on Monday and by Wednesday I was at $1500 and there was no money...  I think it would have sold on Monday for around $1800???

     

    Thanks for the reply. 

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