ZR-1 Block Numbers - ZR-1 Net Registry Forums

LGAFF · 06-13-2010

Not sure if these are posted or not...

ZR-1 Block #s

10090511...350.....90....2...LT-5, ZR1 Vette, 375hp

10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp

10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp

LGAFF · 06-13-2010

I thought this might help in decoding Dominic's block, but I did not find this referenced on the spare block that I have.

It has 10ZSH 91100015 on the side.

I did notice on the front drivers side it is numbered with 1059...I am wondering if this is the sequence of LT-5s built...the car is # 702 so its possible.

XfireZ51 · 06-13-2010

Lee,

Maybe Gordon Killebrew could be of help on this.
Didn't my block have the 9001 number?

LGAFF · 06-13-2010

Found it, the 90 actually has a 91 block stamp 10153558

Also Block and Girdle are mated with the same stamped # 1059

1989ZR1#74 · 06-14-2010

10ZSH 91100015 ??

10ZSH: 1990 MY 375HP/350CI, Manual Transmission Electronic A/C

91100015 is short 2 digits. Are you sure that's the number?

It should start with an X for MM Stilwater
last 4 are that days sequence, but the date derivative can't be right.
So should look something like this:

X911100015:
X = MM
9 = 1989
11 = November
10 = 10th
0015 = 15th LT5 assembled that day.

Eric

LGAFF · 06-14-2010

I will look, does your motor have matching stamps on the block and girdle?

Date Stamp from #702

1989ZR1#74 · 06-14-2010

This LT5 came from the 702nd 1990 built. It's VIN is: 1G1YZ23J8L5800702
It is/was a Black/Black

It's block casting date was Tuesday 10/03/1989. Unlike non LT5s that have raised cast in dates the LT5 casting date is "stamped" into the block. This number will supesede the date on the "oil pan" boss.

LGAFF · 06-14-2010

So

10ZAA X 206170003

Is this an LT-5 produced on 6/17/1992 and the third motor produced?

This is Dominics motor.....VIN stamp area does not match the car

This is the stamp were the VIN traditionally is

100991 14

Eric870 · 06-14-2010

My 1990 #740, the motor was built on 11/20/89 5th motor of the day.10ZSHX911200005

Question: My Build Sheet Date of my car is 89/321. Does that = 11/16/89? That is 4 day before my motor was built.

bdw18_123 · 06-14-2010

More LT5 stamp weirdness? My '90 ZR-1 LT5 re-stampings are still a mystery also.

Here is a recap of mine:

#2299, MM LT5 number re-stamp:

VIN cross-out & block casting date (passenger side of engine):

VIN stamp (driver side of engine):

Invoice for the car has 5/22/90 as the "PRICED" date, which I think is supposed to be the build date? And 11/22/90 is when the car was delivered to the original buyer.

06-13-2010	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	ZR-1 Block Numbers Not sure if these are posted or not... ZR-1 Block #s 10090511...350.....90....2...LT-5, ZR1 Vette, 375hp 10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp 10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-13-2010	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,709	Re: ZR-1 Block Numbers Lee, Maybe Gordon Killebrew could be of help on this. Didn't my block have the 9001 number?

06-13-2010	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: ZR-1 Block Numbers Found it, the 90 actually has a 91 block stamp 10153558 Also Block and Girdle are mated with the same stamped # 1059 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-13-2010 at 11:34 PM.

06-14-2010	#5
1989ZR1#74 Join Date: Jan 2009 Location: Scottsdale, AZ Posts: 700	Re: ZR-1 Block Numbers 10ZSH 91100015 ?? 10ZSH: 1990 MY 375HP/350CI, Manual Transmission Electronic A/C 91100015 is short 2 digits. Are you sure that's the number? It should start with an X for MM Stilwater last 4 are that days sequence, but the date derivative can't be right. So should look something like this: X911100015: X = MM 9 = 1989 11 = November 10 = 10th 0015 = 15th LT5 assembled that day. Eric __________________ 1989 ZR-1 #04 Pilot, Advertising/PR Campbell-Ewald S9YKH1 1989 ZR-1 #58 LT5 only 1989 ZR-1 #74 Unreleased Production / PR Dept 9PR110 NCRS #3,182 SACC #2,420 Member Corvette Museum Corvette Forum: "ewjxn" 2009, 2010 Gathering Attendee Last edited by 1989ZR1#74; 06-14-2010 at 01:35 PM.

06-14-2010	#6
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: ZR-1 Block Numbers I will look, does your motor have matching stamps on the block and girdle? Date Stamp from #702 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-14-2010 at 03:06 PM.

06-13-2010	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: ZR-1 Block Numbers I thought this might help in decoding Dominic's block, but I did not find this referenced on the spare block that I have. It has 10ZSH 91100015 on the side. I did notice on the front drivers side it is numbered with 1059...I am wondering if this is the sequence of LT-5s built...the car is # 702 so its possible. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

06-14-2010	#7
1989ZR1#74 Join Date: Jan 2009 Location: Scottsdale, AZ Posts: 700	Re: ZR-1 Block Numbers This LT5 came from the 702nd 1990 built. It's VIN is: 1G1YZ23J8L5800702 It is/was a Black/Black It's block casting date was Tuesday 10/03/1989. Unlike non LT5s that have raised cast in dates the LT5 casting date is "stamped" into the block. This number will supesede the date on the "oil pan" boss. __________________ 1989 ZR-1 #04 Pilot, Advertising/PR Campbell-Ewald S9YKH1 1989 ZR-1 #58 LT5 only 1989 ZR-1 #74 Unreleased Production / PR Dept 9PR110 NCRS #3,182 SACC #2,420 Member Corvette Museum Corvette Forum: "ewjxn" 2009, 2010 Gathering Attendee Last edited by 1989ZR1#74; 06-14-2010 at 06:48 PM.

06-14-2010	#8
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: ZR-1 Block Numbers So 10ZAA X 206170003 Is this an LT-5 produced on 6/17/1992 and the third motor produced? This is Dominics motor.....VIN stamp area does not match the car This is the stamp were the VIN traditionally is 100991 14 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-14-2010 at 09:53 PM.

06-14-2010	#9
Eric870 Join Date: Apr 2009 Location: Portland OR Posts: 173	Re: ZR-1 Block Numbers My 1990 #740, the motor was built on 11/20/89 5th motor of the day.10ZSHX911200005 Question: My Build Sheet Date of my car is 89/321. Does that = 11/16/89? That is 4 day before my motor was built.

06-14-2010	#10
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 809	Re: ZR-1 Block Numbers More LT5 stamp weirdness? My '90 ZR-1 LT5 re-stampings are still a mystery also. Here is a recap of mine: #2299, MM LT5 number re-stamp: VIN cross-out & block casting date (passenger side of engine): VIN stamp (driver side of engine): Invoice for the car has 5/22/90 as the "PRICED" date, which I think is supposed to be the build date? And 11/22/90 is when the car was delivered to the original buyer. __________________ [IMG]http://i13.photobucket.com/albums/a292/bdw18_123/_zr1netforumsigphoto.jpg[/IMG][B] 1990 Corvette ZR-1 [/B][I] White/Flame Red, #2299, mostly stock, 144K miles.[/I] -Cams timed to the '93-'95 405HP LT5 stock timing. -IAT sensor relocated to below front bumper. -Haibeck hoops installed in airduct. -OBX cat-back exhaust. [COLOR=DarkRed][B](SOLD - December 2012 [/B][/COLOR][COLOR=DarkRed][B]:hello:)[/B][/COLOR] 1993 Corvette Coupe Black/Black, 6-speed (SOLD - October 2009 :hello:) Last edited by bdw18_123; 06-14-2010 at 10:12 PM.

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