Author Topic: What carb date for my 06A early June Z  (Read 5405 times)

69Z28

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What carb date for my 06A early June Z
« on: April 14, 2013, 05:54:11 AM »
Hi guys. Is a 4053 dated 934 too far out for my 06A early, as in 653104, June Z? I'm looking at one now I would like to pick up if the date is ok.
GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28

WorkinProgress

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Re: What carb date for my 06A early June Z
« Reply #1 on: April 14, 2013, 12:03:46 PM »
What is your engine assembly date?

69Z28

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Re: What carb date for my 06A early June Z
« Reply #2 on: April 14, 2013, 01:43:19 PM »
V0604DZ cast date on block is E 28 9 heads are E 28 9 and F 1 9

What is your engine assembly date?
GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28

william

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Re: What carb date for my 06A early June Z
« Reply #3 on: April 14, 2013, 04:12:20 PM »
Carbs were installed during vehicle assembly, not at the engine plants.

My db has Z/28s in that time frame with carbs dated 933, 943, 952. 934 would have been possible.

WorkinProgress

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Re: What carb date for my 06A early June Z
« Reply #4 on: April 14, 2013, 05:51:27 PM »
My 05E build Norwood car is (a little over) one thousand serial numbers less than your car Gary. Engine stamp V0514DZ with carb dated 943.

Bill, why were the carbs not included with the engine assembly? Distributors were, as I was told that is why they have the chisel marks on the intake, and distributor neck for basic timing alignment. Those marks were there in case the dist was disturbed during transit. So why not ship with carb attached? No gasoline would be included at that stage.

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JohnZ

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Re: What carb date for my 06A early June Z
« Reply #5 on: April 14, 2013, 06:12:36 PM »
<< why were the carbs not included with the engine assembly? Distributors were, as I was told that is why they have the chisel marks on the intake, and distributor neck for basic timing alignment. Those marks were there in case the dist was disturbed during transit. So why not ship with carb attached? No gasoline would be included at that stage. >>

Engines were shipped "bare-naked" from the engine plants - they didn't need carburetors, as they were hot-tested using natural gas. The engine plants would have needed to stock thousands of carburetors to cover the hundreds of different car and truck engine suffixes they built every day. Photo below was taken on the Flint V-8 shipping dock in 1955, and the as-shipped state of engine dress didn't change much for the next 20 years.
'69 Z/28
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rszmjt

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Re: What carb date for my 06A early June Z
« Reply #6 on: April 14, 2013, 06:46:27 PM »
V0604DZ cast date on block is E 28 9 heads are E 28 9 and F 1 9

What is your engine assembly date?

My 06A Z28 ( owned since 73) has the original carb 100% for sure, my engine is VO527DZ and my carb is 9-5-2 ( May 2 week)

WorkinProgress

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Re: What carb date for my 06A early June Z
« Reply #7 on: April 14, 2013, 07:10:53 PM »
Thanks for the explanation JohnZ about the carburetors!

So the distributors were not installed with the engine assembly when shipped as they were shipped naked? Was the distributor that was tested with the engine reunited at the car assembly plant? When were those chisel marks done at the final assembly of the car?

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67 RS Ragtop

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Re: What carb date for my 06A early June Z
« Reply #8 on: April 14, 2013, 08:05:49 PM »
Warren,
The pic shows the distributor in place, and I believe it was shipped to the dress line as such, but John will give you the definative answer on that.

69Z28

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Re: What carb date for my 06A early June Z
« Reply #9 on: April 14, 2013, 08:44:35 PM »
Thanks fellas. I am thinking of putting in a bid for this carb. What do you think? I'm really looking for a 943 but haven't found a core yet in 14 years of looking. Everyone wants to sell me a restored one and I don't want a restored one. I want the patina to match what I have.

http://www.ebay.com/itm/200915392744?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_306wt_1043
GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28

rszmjt

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Re: What carb date for my 06A early June Z
« Reply #10 on: April 15, 2013, 12:23:25 AM »
Thanks fellas. I am thinking of putting in a bid for this carb. What do you think? I'm really looking for a 943 but haven't found a core yet in 14 years of looking. Everyone wants to sell me a restored one and I don't want a restored one. I want the patina to match what I have.

http://www.ebay.com/itm/200915392744?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_306wt_1043

IMO it is TOO EARLY, (Read my post above, my carb is 9-5-2 and my DZ engine stamp is before yours), I honestly don't see how a March carb can find its way onto a June car, 2 weeks to 4 weeks is the norm, with 4 even being a stretch.

Seller says - " very nice and the factory choke set up work perfect too",    I don't see how that is possible, it is missing the fast idle Lever and Plastic Fast Idle Cam. You should ask him for a picture of the LH rear drivers corner to see if it has the original non reinforced base plate.

william

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Re: What carb date for my 06A early June Z
« Reply #11 on: April 15, 2013, 02:46:09 AM »
Once again engines were furnished to the assembly plants without carb. The inventory of carbs was there, not at Flint so the carb date is unrelated to when the engine was built.

There are 30-40 known build dates for 4053 carbs covering the 1969 model year. That means they were batch-built 400-500 units at a time. As a Tier 1 supplier there is no way carbs were 'made to order'; they were shipped from finished goods inventory. They sat in stock at Holley; they sat in stock at the plant. There was no first-in first-out requirement. If it was the correct part it was used regardless of date. My data shows 943 carbs as late as August '69.

 

rszmjt

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Re: What carb date for my 06A early June Z
« Reply #12 on: April 15, 2013, 03:24:44 AM »
Once again engines were furnished to the assembly plants without carb. The inventory of carbs was there, not at Flint so the carb date is unrelated to when the engine was built.

There are 30-40 known build dates for 4053 carbs covering the 1969 model year. That means they were batch-built 400-500 units at a time. As a Tier 1 supplier there is no way carbs were 'made to order'; they were shipped from finished goods inventory. They sat in stock at Holley; they sat in stock at the plant. There was no first-in first-out requirement. If it was the correct part it was used regardless of date. My data shows 943 carbs as late as August '69.

  

Thanks. Good point.  That may be the case but I posted my carb date/engine build date as a reference so comparisons could be made. I understand that carbs were probably not rotated like groceries with pull dates, and a wider date range is known to exist. The Ebay 4053 Mar 2 week carb in question could probably work for Gary, but seeing as the posted 05E Z28 1,000 serial numbers less has a April 3 week carb, do you think that would be considered normal?

69Z28

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Re: What carb date for my 06A early June Z
« Reply #13 on: April 15, 2013, 09:37:36 AM »
ok, so a 934 wouldn't be out of the question? I'll send an email to find out about the missing pieces and the base plate.

NOTE:
I sent email just waiting for a response.
GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28

Ed_B

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Re: What carb date for my 06A early June Z
« Reply #14 on: April 15, 2013, 01:41:57 PM »
Yes, 934 would be possible. My 05D Los Angeles built 68 Camaro has its original 4053 with a date code of 833, so you can see it's dated two months before the car was built.

Ed