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

[ch1929]

Does someone have an old AC Spark Plug catalog that shows what the AC E9 18mm spark plug fits?

 

[Larry Schramm]

5 hours ago, ch1929 said:

Does someone have an old AC Spark Plug catalog that shows what the AC E9 18mm spark plug fits?

 

 

Can you post a picture?

[Hans1]

Are we sure AC is maker?

 

There is a B9 by Auto Lite.

 

 

[Mark Gregush]

The early Ford Flat head V8's used 18 mm plugs. What number it would be, I don't know. (B 4 cylinder still used 7/8")

[ch1929]

[PFindlay]

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

 

[ch1929]

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

 

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

 

 

[TerryB]

I had posted that, I’m not sure why I didn’t post the previous page.  Unfortunately the book is now in the hands of someone else.

[ch1929]

Thanks Terry!

[motoringicons]

Would you have TWELVE of these? I would be interested in a set of twelve. Thanks. Email: motoringicons@hotmail.com or 734-730-4274

[Hans1]

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.

Edited February 21 by Hans1
change 19 to 18 metric (see edit history)

[ch1929]

13 hours ago, motoringicons said:

Would you have TWELVE of these? I would be interested in a set of twelve. Thanks. Email: motoringicons@hotmail.com or 734-730-4274

I only have 6 not looking to sell, Thanks.

[ch1929]

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. 

[Hans1]

post in wrong place

Edited February 21 by Hans1
wrong post (see edit history)