|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
01-08-2020, 12:41 PM | #1 |
Member
Join Date: Sep 2014
Posts: 63
|
Zenith Carb markings
I bought a 1929 Coups about a month ago. It has a lot of the original parts on it. Looking at the zenith carb the upper body it is marked with an "Z" but the bottom half has no markings. All of the Zeniths I have had over the years always had Zenith 1, 2 or 3 marked on the lower half. It uses all Zenith parts and otherwise looks like a Zenith 1 and 2. Any ideas why the lower half is not marked?
|
01-08-2020, 01:58 PM | #2 |
Senior Member
Join Date: Jul 2010
Location: United Kingdom
Posts: 1,441
|
Re: Zenith Carb markings
not marked lower half bodies were produced by Holley Jul- Dec 1928 ( from Steve Pargeter's excellent Zenith Model A Guidelines Restoration Guide) . FYI they are all interchangeable.
|
Sponsored Links (Register now to hide all advertisements) |
|
01-08-2020, 06:30 PM | #3 |
BANNED
Join Date: Dec 2019
Posts: 1,196
|
Re: Zenith Carb markings
Some were marked with a raised "H" on the lower bowl.What I've read (and please correct me if I'm wrong) is that Ford and George Holley didn't see eye to eye but allowed Holley to build under contract till Zenith could get their capacity up to Ford demand. |
01-08-2020, 08:54 PM | #4 |
Senior Member
Join Date: May 2010
Location: brentwood, ca
Posts: 4,241
|
Re: Zenith Carb markings
Also, in order to return defective carbs from the dealers to holly a marking system evolved.
|
01-09-2020, 06:19 AM | #5 |
Senior Member
Join Date: Jul 2010
Location: United Kingdom
Posts: 1,441
|
Re: Zenith Carb markings
|
01-09-2020, 02:34 PM | #6 |
Senior Member
Join Date: May 2010
Location: brentwood, ca
Posts: 4,241
|
Re: Zenith Carb markings
Sponsored Links (Register now to hide all advertisements)
I'm still trying to learn it. |
01-09-2020, 02:59 PM | #7 |
BANNED
Join Date: Sep 2017
Posts: 385
|
Re: Zenith Carb markings
Here are a couple more that can stir the pot as to when, where and who. The upper one, plain raised Zenith is not the Early style Carb, it has the screw in secondary well as does the lower one..
Last edited by F.M.; 01-09-2020 at 03:05 PM. |
01-10-2020, 04:25 AM | #8 | |
Senior Member
Join Date: Jul 2010
Location: United Kingdom
Posts: 1,441
|
Re: Zenith Carb markings
Quote:
LaterrArrgh sorry I was mixing my GAV seats and secondary wells ( a painful experience) - Worra load of tosh I've written!-- I plead it's an age thing. Last edited by johnbuckley; 01-11-2020 at 05:43 AM. |
|
01-10-2020, 07:53 AM | #9 |
BANNED
Join Date: May 2010
Location: Walla Walla, Washington USA
Posts: 6,066
|
Re: Zenith Carb markings
Steve Schmach also did some excelent articles about carburetors in the following The Restorer's (MAFCA):
“A Guide to Zenith Carburetors…Part 1…The 1927 Zenith Carburetors”: TR/61/6/8 (2017) “A Guide to Zenith Carburetors…Part 2…The 1928 Zenith Carburetors”: TR/62/1/8-9 (2017) “A Guide to Zenith Carburetors…Part 3…The 1929 Zenith Carburetors”: TR/62/2/8-11 (2017) “A Guide to Zenith Carburetors…Part 4…The 1930 Zenith Carburetors”: TR/62/3/8-11 (2017) “A Guide to Zenith Carburetors…Part 5…The 1931 Zenith Carburetors”: TR/62/4/8- 14 (2017) Pluck |
01-10-2020, 12:24 PM | #10 |
Senior Member
Join Date: May 2010
Posts: 2,597
|
Re: Zenith Carb markings
For those of us that do not know the "new Math" what does this mean?
TR/61/6/8 (2017) TR/62/1/8-9 (2017) TR/62/2/8-11 (2017) TR/62/3/8-11 (2017) TR/62/4/8- 14 (2017) Thanks |
01-10-2020, 12:41 PM | #11 |
Senior Member
Join Date: May 2010
Location: Cape Cod MA
Posts: 2,840
|
Re: Zenith Carb markings
My Holley has the capital H on the lower half and also just above it an H on the upper half. Is that common or does it denote a certain production period of time?
|
01-10-2020, 01:00 PM | #12 |
Senior Member
Join Date: May 2010
Posts: 2,597
|
Re: Zenith Carb markings
"H over H" is Holley (with upper "H" directly above lower "H").
July 28 though Sept 28 Last edited by Benson; 01-10-2020 at 01:47 PM. |
01-10-2020, 02:23 PM | #13 |
BANNED
Join Date: May 2010
Location: Walla Walla, Washington USA
Posts: 6,066
|
Re: Zenith Carb markings
|
01-10-2020, 02:56 PM | #14 |
BANNED
Join Date: Sep 2017
Posts: 385
|
Re: Zenith Carb markings
Holley Top; 1928 Jan.-June-- H
Bottom; 1928 Jan.--June--H (No Secondary Well for Brass insert, Cast Only) Holley top; 1928 July-Aug.--1931 Plain. Holley Bottom; 1928 Plain Has Secondary Well for brass Brass insert. |
01-10-2020, 05:31 PM | #15 |
BANNED
Join Date: Sep 2017
Posts: 385
|
Re: Zenith Carb markings
Rich, Yours was made and used from Jan. 1928 thru June 1928. It is of the Double Venturi style.. No secondary Brass Well, just the cast hole, not threaded.
|
01-10-2020, 05:42 PM | #16 |
Senior Member
Join Date: Apr 2013
Location: Columbia, TN.38401
Posts: 422
|
Re: Zenith Carb markings
In the 70's I had a zenith 1,2,3 that was all marked. they say there was also one with no number on it.
|
01-10-2020, 06:27 PM | #17 | |
Senior Member
Join Date: Jun 2010
Posts: 934
|
Re: Zenith Carb markings
Quote:
Many people do not understand the designators on the Zenith carbs. They were all "Zenith" design but not necessarily made by Zenith. The "Zenith" body with Zenith and no numbers was made by Zenith from 1927 - June 1929. The "Zenith" body with Zenith-1 were made by Zenith from July 1929 to the end of production. The "Zenith" body with a H were made by Holley from Jan-Jun 28. The "Zenith" body with no marking were made by Holley from Jul-Dec 28. The "Zenith" body with Zenith-2 were made by Holley from Jan 1929 to the end of production. The "Zenith" body with Zenith-3 were made by Ford from 1931 to the end of production. |
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|