CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
July 31, 2014, 02:39:19 PM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
102520 Posts in 12093 Topics by 4669 Members
Latest Member: paulmanta
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Decoding/Numbers
| | |-+  VIN assignment - JohnZ?
« previous next »
Pages: 1 [2]  All Print
Author Topic: VIN assignment - JohnZ?  (Read 4419 times)
Mark
CRG Member
*****
Posts: 932



View Profile Email
« Reply #15 on: February 03, 2011, 12:29:33 PM »

Because Feb 28th was a friday, that was the 2D build week.  At midnight on 2/28 someone on GMs side of the plant recorded the VIN of the car that just left the assembly line for the shipper and thats the number reported as the last VIN assembled in February.  At that time there was another days worth of production sitting on the GM side of the plant with 2D on the cowl tag, and another day and a halfs production on the Fisher side of the plant with 02D on the cowl tag.  All those cars (about 2500) will show up as 02D cars but they were actually built in arch, and some of them will have March dated components.
Logged

Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
KurtS
CRG Coordinator
*****
Posts: 3165


View Profile Email
« Reply #16 on: February 04, 2011, 04:45:33 PM »

Again, it all depended on when Fisher wanted to change the date on the tag. The date code obviously wasn't real important to them. I'm not convinced that it didn't sometimes change it mid-week.
Logged

Kurt S
CRG
srode
Member
***
Posts: 173



View Profile Email
« Reply #17 on: February 04, 2011, 06:32:14 PM »

So 5000 or 6000 over the last VIN listed for February on a 2D would not be unlikely?
Logged

Steve - 02D Z11 and a Plain Jane hardtop
Mark
CRG Member
*****
Posts: 932



View Profile Email
« Reply #18 on: February 04, 2011, 08:18:26 PM »

That would be a little excessive for February which just happened to end on a friday in 69, but not out of the possibility if the actual calendar month ended on a tuesday or wednesday.

GM gave Fisher the orders for the cars to be built in advance so fisher could plan their work.  Did they give it to them  a days production (912 cars) a week ahead, or 2 weeks I don't think anyone here knows that.  Fisher would take those orders, which in 69 had an order number that became the body number for each car, but in 67 and 68 Fisher assigned a sequentially assigned number to each order (which became the body number) so they could track the body.  Fisher then assigned a build week that the car was to be built in, which was generally in the same order they were received)  Say the order for 1 days worth of cars was delivered to Fisher on Feb 28th and they were going to be built 1 week from that time.  The trim tags were prepared with either a sequential number (67/68) for each car or the order number as the body number and whatever other option and color info needed for the order.  At this point this group of tags was set aside and the next 912 tags were prepared, and ultimatelyt there should have been 5 groups of 912 cars in a single build week.  As the time arrived to build the cars the scheduler at Fisher would go thru a days production worth of 912 tags and regroup them based on Fishers build restraints.  He had to look at things like convertibles, vinyl tops, possible RS equipment and anything that would take extra time on the assembly line.  You certainly wouldn't want to see 2 convertibles right after each other, as it took extra time to install a convertible top, same with vinyl tops.  If I had to guess you would never see 2 convertible closer than 8 or 10 bodys apart, maybe a little less for a vinyl top car.  I have not seen any data to indicate that there was any grouping based on color.  ie he did not go thru the order to find all of the red cars and put them together.  So the scheduler takes his 912 sequential order body numbers and shufflles them up to meet whatever construction constraints Fisher had, so maybe the car with body number 001 gets shuffled so it follows car 027, and car 030 gets brought up to the front of the line, also if GM decided they need a particular car to be built earlier than any others they could request Fisher move it up (or back).  At this point the scheduler assigns the work order number to the car (this is the W/O number on the LOS tags) that indicates the position of the body in that days assembly order, (ie body 1 thru 912) and releases it to the plant for building.  (theres a bunch more stuff that happens in the background like ensuring the parts for these cars are on hand, you have adequate paint to paint the bodies, interior components of the correct colors and styles are on hand, etc.  On the day of assembly those tags are delivered to the floor and the bodies are built in the order specified.  It took about a day to a day and 1/2 for a body tub to go thru Fishers side of the plant.  Once the completed rear half of the bodies were completed by Fisher and sent over to GM in whatever order they started out in they were given a sequential VIN.  first car got the first VIN then each one incremented up by one.  GM had a body bank of 6 lines that held about 72 cars total that allowed them to reorder the cars based on their build contraints things like RS, consoles, SS's and Z28's (due to stripeing requirments) that took extra time would be divided out and then metered back into the single common assembly line  so that the line would not be overloaded by having multiple highly optioned cars arriving at an assembly point one after the other.  This configuration of the line means that the cars did not progress down the GM side of the plant in purely increasing sequential order.  They were almost in order but the higher optioned cars, console cars, RS/SS's probably trailed by a few VINs, maybe 6 to 8 depending as they were fed back into the assembly line.  The only point in time that the cars were purely in increasing sequential order was when they came thru from Fisher and before they got to the Scheduling bank.  It took about a day for the car to go from the scheduling bank to being driven out the back door and getting delivered to the shipper that was going to deliver it to the dealer.  So you can see that there is a delay from the reported last VIN of the month and the end of the actual build week stamped on the tag, that could probably be as much as 4500 cars, depending on what day of the week the month actually ended on.
Logged

Mark C.
1969 Indy Pace Car
350/300HP RPO Z11
KurtS
CRG Coordinator
*****
Posts: 3165


View Profile Email
« Reply #19 on: February 04, 2011, 09:51:13 PM »

I see Mark was feeling verbose today... Wink

Two things - noone knows where the end-of-the-month VIN was on the line (and the # isn't always consistent with real data - see all the caveats in the end-of-the-month VIN list).
And I recall that JohnZ indicated that bodies were batched by color to save paint via reduced nozzle cleanout/changeover. Hard to have enought data to see that pattern though. Smiley
Logged

Kurt S
CRG
JohnZ
CRG Member
*****
Posts: 4051


View Profile Email
« Reply #20 on: February 05, 2011, 10:11:28 AM »

And I recall that JohnZ indicated that bodies were batched by color to save paint via reduced nozzle cleanout/changeover. Hard to have enought data to see that pattern though. Smiley

Color-batching was in its infancy in the late 60's; it was practiced to some extent, but didn't really come into its own until the late 70's when plants were measured against each other in terms of the precise amount of consumables (paint, thinner, rags, gloves, masking material, sealer, phosphate chemicals, etc.) used per car produced; it became one of the metrics of plant efficiency by which the plants were judged.
Logged

'69 Z/28
Fathom Green
CRG
GaryL
Hero Member
*****
Posts: 538


Marilyn and me

gandmal
View Profile Email
« Reply #21 on: February 07, 2011, 12:00:13 AM »

So 5000 or 6000 over the last VIN listed for February on a 2D would not be unlikely?

My 02D is 5947 past the last recorded VIN. I have a March diff. They must have been waiting for 3.73 posi rear ends.
« Last Edit: February 07, 2011, 12:22:31 AM by GaryL » Logged

Gary

Lemans Blue X33. DZ, M20, manual steering. Only BU code rear end is original.
srode
Member
***
Posts: 173



View Profile Email
« Reply #22 on: February 07, 2011, 04:59:11 AM »

Gary, I've seen more than one in that range, almost like they missed changing the date for a week or more for some reason, or they were missing parts to complete cars.
Logged

Steve - 02D Z11 and a Plain Jane hardtop
firstgenaddict
Hero Member
*****
Posts: 1191



View Profile WWW
« Reply #23 on: February 10, 2011, 11:09:28 AM »

The 10D I am restoring now has a first week November VIN. It's a few thousand in best I remember. Very typical for end of the month fisher bodies to have next months Norwood VIN assignments.
Logged

James
Collectin' Camaro's since "Only Rednecks drove them"
 
Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://picasaweb.google.com/112392262205377424364/1969_Z28_Restoration
Pages: 1 [2]  All Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.08 seconds with 17 queries.