Cracked the Build Sheet code and now know build date>>> - ZR-1 Net Registry Forums

ZR1Vette · 02-01-2009

On my 1990 ZR-1 (#566) build sheet there are two date references:
SCHED. NO. DATE 0105917

DATE: 89/297
TIME: 12:37

The second number sequence group would be 89 for 1989 and 297 for the 297th day of the year which would be 10/24/89...yet on the lower left inside hood is a grease pencil marking 10 27 89A (which according to NCRS types is the build completion date). Very faint but can see the 10 and 89A in this pic and with a flash light at the correct angle can see the full date of 10 27 89A

Assume build sheet was issued (thus start of production) on 10/24/89 and car finished production 10/27/89. The engine build date is 10 7 89

The ZR-1 was recorded into dealer stock on 11/20/89 (that date and dealer stock number also in grease pencil on the upper underside of hood) and sold 11/21/89 (have the original bill of sale)... so it took about 25 days to leave BG and arrive to the St. Petersburg FLA dealership (Maher Chevrolet)

(1) Still need to decipher SCHED. NO. DATE 0105917
(2) For the month of January my ZR has been the 'ZR-1 of the Month' with the very wrong build date of 11/21/89 shown (my fault...I provided info)

tomtom72 · 02-01-2009

That's some nice detective & cypher cracking work Mike!

I've never noticed any grease pencil markings on my hood, just that engraved date thing. Also, my CCVB cover doesn't have any engravings on it either, unless I missed it when I was cleaning the oil mess off of it & the rest of the valley. What a mess! The cover bolts were finger tight & the blow by was sooo bad that I had oil running out of the pipe on to the oil pan....at least I knew that my valley drain wasn't clogged....

Tom

RedSled · 02-01-2009

Michael. Thanks. Now I have to go look closely at my hood!

- Keith
'90 Red/Red #1383

ZZZZZR1 · 02-01-2009

Great work Michael!!!!

GOLDCYLON · 02-01-2009

Great write up.

flyin ryan · 02-01-2009

Quote:

Originally Posted by GOLDCYLON

Great write up.

Yup...good stuff

lbszr · 02-01-2009

Quote:

Originally Posted by ZR1Vette

On my 1990 ZR-1 (#566) build sheet there are two date references:
SCHED. NO. DATE 0105917

DATE: 89/297
TIME: 12:37

The second number sequence group would be 89 for 1989 and 297 for the 297th day of the year which would be 10/24/89...yet on the lower left inside hood is a grease pencil marking 10 27 89A (which according to NCRS types is the build completion date). Very faint but can see the 10 and 89A in this pic and with a flash light at the correct angle can see the full date of 10 27 89A
The ZR-1 was recorded into dealer stock on 11/20/89 (that date and dealer stock number also in grease pencil on the upper underside of hood) and sold 11/21/89 (have the original bill of sale)... so it took about 25 days to leave BG and arrive to the St. Petersburg FLA dealership (Maher Chevrolet)

(1) Still need to decipher SCHED. NO. DATE 0105917
(2) For the month of January my ZR has been the 'ZR-1 of the Month' with the very wrong build date of 11/21/89 shown (my fault...I provided info)

I don't remember seeing numbers on the top of my breather like yours has.

You wouldn't happen to know how to crack the code on a ignition module with 2H18E? It's a spare and just wondered how long it's been setting on a shelf?

02-01-2009	#2
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Cracked the Build Sheet code and now know build date>>> That's some nice detective & cypher cracking work Mike! I've never noticed any grease pencil markings on my hood, just that engraved date thing. Also, my CCVB cover doesn't have any engravings on it either, unless I missed it when I was cleaning the oil mess off of it & the rest of the valley. What a mess! The cover bolts were finger tight & the blow by was sooo bad that I had oil running out of the pipe on to the oil pan....at least I knew that my valley drain wasn't clogged.... Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

02-01-2009	#3
RedSled Join Date: Nov 2006 Location: Germantown, Maryland Posts: 522	Re: Cracked the Build Sheet code and now know build date>>> Michael. Thanks. Now I have to go look closely at my hood! - Keith '90 Red/Red #1383

02-01-2009	#4
ZZZZZR1 Banned BANNED Join Date: Oct 2006 Location: MD Posts: 3,674	Re: Cracked the Build Sheet code and now know build date>>> Great work Michael!!!!

02-01-2009	#1
ZR1Vette Join Date: Dec 2007 Location: Reston, Virginia Posts: 930	Cracked the Build Sheet code and now know build date>>> On my 1990 ZR-1 (#566) build sheet there are two date references: SCHED. NO. DATE 0105917 DATE: 89/297 TIME: 12:37 The second number sequence group would be 89 for 1989 and 297 for the 297th day of the year which would be 10/24/89...yet on the lower left inside hood is a grease pencil marking 10 27 89A (which according to NCRS types is the build completion date). Very faint but can see the 10 and 89A in this pic and with a flash light at the correct angle can see the full date of 10 27 89A Assume build sheet was issued (thus start of production) on 10/24/89 and car finished production 10/27/89. The engine build date is 10 7 89 The ZR-1 was recorded into dealer stock on 11/20/89 (that date and dealer stock number also in grease pencil on the upper underside of hood) and sold 11/21/89 (have the original bill of sale)... so it took about 25 days to leave BG and arrive to the St. Petersburg FLA dealership (Maher Chevrolet) (1) Still need to decipher SCHED. NO. DATE 0105917 (2) For the month of January my ZR has been the 'ZR-1 of the Month' with the very wrong build date of 11/21/89 shown (my fault...I provided info) Last edited by ZR1Vette; 02-01-2009 at 11:20 AM.

02-01-2009	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Cracked the Build Sheet code and now know build date>>> Great write up. __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V