Author Topic: 9204 brake booster on ebay  (Read 6384 times)

latecode

  • Newbie
  • *
  • Posts: 5
    • View Profile
9204 brake booster on ebay
« on: November 03, 2012, 09:46:50 AM »
Has anyone seen 9204brake booster on ebay,if so is it real?


tim69camaro

  • Member
  • ***
  • Posts: 165
    • View Profile
Re: 9204 brake booster on ebay
« Reply #2 on: November 03, 2012, 11:11:33 AM »
The part number stamp looks okay but I don't see a delco stamp on the front. A photo of the date stamp may help.
Tim Bailey

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #3 on: November 03, 2012, 12:54:54 PM »
 I have a 9204 that was restored in the 80's in my shed collecting dust and the fonts on that one are much larger (1/8" height characters)  than the ones in the picture latecode posted and the date is 334 (late 68), plus no Delco stamp. Interesting the one on eBay has a Julian date of 2 (early 69) and has such a small font. As for the Delco stamp, Steve at Brakeboosters said the '69's should have the Delco stamp on the front shell so the one I have may have had the front shell replaced when it was replated back then -or- two styles do exist. Mine looks like the eBay pic which has no Delco stamp either except larger fonts. The ad states 1/8" fonts but they look like 1/16" fonts. When I bought it in the 80's I didn't know or care about stampings and I traded an 8515 for it! If I had only known back then.....

Below are close up of the rear shell I have from a 9204.

Mike
« Last Edit: November 03, 2012, 01:16:03 PM by Mike S »
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

68camaroz28

  • Hero Member
  • *****
  • Posts: 1171
    • View Profile
Re: 9204 brake booster on ebay
« Reply #4 on: November 03, 2012, 02:20:18 PM »
I agree with Mike 100%......
Chick
68 Z/28 NOR 01B Orig motor/trans/rear
69 Z/28 NOR 07A Orig Block & GM Cross-ram/carbs
69 L34 Rest. Nova Father/Son Car
69 L78 Surv Nova Purch 4/69 31K miles
67 L89 Corv Tribute
68 Corv 427/400 Orig motor
07 Corv Z06
R 68Z build- http://www.camaros.net/forums/showthread.php?t=182584

x77-69z28

  • Hero Member
  • *****
  • Posts: 855
    • View Profile
Re: 9204 brake booster on ebay
« Reply #5 on: November 04, 2012, 03:36:59 AM »
My 05a 69 z-28 has the small font and no deco stamp on the front. I have owned the car since 1978, and the booster is orig to the car.
69 x77 burnished brown, 711 int 05A bought in 78
67 rs/ss 350 butternut yellow 4 speed 2nd owner
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
11 cts-v blk diamond  edition wagon 556hp sick!

tmodel66

  • Hero Member
  • *****
  • Posts: 1212
    • View Profile
Re: 9204 brake booster on ebay
« Reply #6 on: November 04, 2012, 04:35:06 AM »
My 07A has the small font and it has the Delco stamp on the front. My Mfg. date is 148 which is May 28th.
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

x77-69z28

  • Hero Member
  • *****
  • Posts: 855
    • View Profile
Re: 9204 brake booster on ebay
« Reply #7 on: November 05, 2012, 12:25:53 AM »
I believe mine is dated 120
69 x77 burnished brown, 711 int 05A bought in 78
67 rs/ss 350 butternut yellow 4 speed 2nd owner
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
11 cts-v blk diamond  edition wagon 556hp sick!

crobjones2

  • Member
  • ***
  • Posts: 345
    • View Profile
Re: 9204 brake booster on ebay
« Reply #8 on: November 12, 2012, 07:41:13 PM »
my 06A Nor has a delco stamp with small numbers -140
Chris
69 SS 350

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #9 on: November 12, 2012, 07:50:49 PM »
   So based on the samples posted here it's looking like boosters made in 67 to sometime late 68 used 1/8" fonts and those stamped in 69 used 1/16" fonts.
I wonder when the Delco stamping appeared. The 1/8" font 9404 booster I have (made in late 68)  has no Delco stampings. It would be interesting to see if 69 dated boosters using the 1/16" fonts is when the Delco stamp appeared.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

JohnZ

  • CRG Member
  • *****
  • Posts: 4279
    • View Profile
Re: 9204 brake booster on ebay
« Reply #10 on: November 12, 2012, 07:56:27 PM »
   So based on the samples posted here it's looking like boosters made in 67 to sometime late 68 used 1/8" fonts and those stamped in 69 used 1/16" fonts.
I wonder when the Delco stamping appeared. The 1/8" font 9404 booster I have (made in late 68)  has no Delco stampings. It would be interesting to see if 69 dated boosters using the 1/16" fonts is when the Delco stamp appeared.

Mike


My 02D '69 has its original 9204 booster (small font) dated "55", and has the Delco Moraine stamp, inverted, below the check valve hole.
'69 Z/28
Fathom Green
CRG

latecode

  • Newbie
  • *
  • Posts: 5
    • View Profile
Re: 9204 brake booster on ebay
« Reply #11 on: November 13, 2012, 12:01:54 AM »
does anyone know if the booster on ebay is real?

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #12 on: November 13, 2012, 12:47:48 AM »
This much seems certain so far based on the few samples posted here:

Boosters made to late 68 used larger 1/8" fonts and no Delco (based on my only sample I have since the 80's from a resto shop)
9204 boosters made in 69 used a smaller 1/16" font but the Delco appearance seems mixed:

1968
Julian date 332 - Delco stamp - no

1969
Tag date Julian date  Delco Stamp?
02D        055           yes
05A        120           no
06A        140           yes
07A        148           yes
  If x77-69z28's  booster is indeed original to his car then that must mean the Delco stamping was not consistent. But this summary is based on a very small sample size so I would not draw any final conclusions. The one on eBay has the small fonts so that seems consistent, but the absence of the Delco can be correct if Delco was not stamped on every unit. However, the ad is wrong in that it states a 1/8" font when in fact that looks like 1/16" height. Also the front cover does not look like a reproduction. Those stand out and can be identified very easily due to them having very crisp pattern edges.
 Give Steve at brakeboosters.com a call if you need a correct booster.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

tim69camaro

  • Member
  • ***
  • Posts: 165
    • View Profile
Re: 9204 brake booster on ebay
« Reply #13 on: November 13, 2012, 01:22:42 AM »
According to Jerry's book the The Definitive 1969 Camaro ... the small stamping started the first quester of 1969.
Tim Bailey

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1457
    • View Profile
Re: 9204 brake booster on ebay
« Reply #14 on: November 13, 2012, 09:28:35 PM »
That's correct, 1/4" characters in '67, '68 and early '69 and then a change to the smaller 1/8" characters in mid 1969.  All '69 boosters should have the Delco in the 8:00 position when looking at the car from the front.

Jerry

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #15 on: November 13, 2012, 10:20:52 PM »
 Hi Jerry,

  Are you sure? Those can't be 1/4" fonts. The pad itself is about 1/4" in height. I took a caliper out and measured my 8515 and early 9204 numbers at approximately .125" (~ 1/8") in height. Looking at later model booster I measured those smaller fonts at approximately .0635 (~ 1/16") height.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

Jerry@CHP

  • CRG Member
  • *****
  • Posts: 1457
    • View Profile
Re: 9204 brake booster on ebay
« Reply #16 on: November 14, 2012, 06:57:38 PM »
You are correct, my mistake.

z28z11

  • Hero Member
  • *****
  • Posts: 773
    • View Profile
Re: 9204 brake booster on ebay
« Reply #17 on: November 19, 2012, 02:03:39 PM »
My 01C X77 booster (owned since 1973, removed from car in 1980) is dated "2" , 9204, small font, "Delco Morraine" upside down under the vacuum port , absolutely original to the car. Almost too good of shape to be sent out for replate - plating is faded but pretty decent (likely due to the fact it hasn't been on the car for 32 years).

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

Stingr69

  • Member
  • ***
  • Posts: 470
    • View Profile
Re: 9204 brake booster on ebay
« Reply #18 on: November 19, 2012, 05:07:12 PM »
Another data point - My early '69 (10A) has the original master cylinder/cover and booster rebuilt by Steve Gregori. It does have the upside down Delco stamping but does not have the "9204" stamps - blank pads.

-Mark.

69Z28-RS

  • Hero Member
  • *****
  • Posts: 3025
  • owner since 4-Apr-1976
    • View Profile
Re: 9204 brake booster on ebay
« Reply #19 on: February 22, 2013, 08:43:57 PM »
I received my original booster back today, after rebuild by Steve Grigori (Brake Boosters, Inc).   he does a nice job for a very reasonable price.. I'm pleased.   and the stamped codes are much easier to read now after the cleaning and replating.   
My car is a late 09C car, with '9204' booster, date 199.   
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

NoYenko

  • Member
  • ***
  • Posts: 331
    • View Profile
Re: 9204 brake booster on ebay
« Reply #20 on: February 22, 2013, 11:58:27 PM »
Another data point. Early 69 Nor 11A /Date stamp 310/Unit stamp 9204/Upside down Delco stamp. George

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #21 on: February 23, 2013, 12:40:18 AM »
Gary & George,

  What size font for the Julian date? 1/16" or 2/16" ?

Thanks,
Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

69Z28-RS

  • Hero Member
  • *****
  • Posts: 3025
  • owner since 4-Apr-1976
    • View Profile
Re: 9204 brake booster on ebay
« Reply #22 on: February 23, 2013, 03:53:29 AM »
I just went down and measured mine..    4/32"  or 1/8" ...   the julian date '199' is inverted (when top is up)..  '9204' is not inverted.
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

NoYenko

  • Member
  • ***
  • Posts: 331
    • View Profile
Re: 9204 brake booster on ebay
« Reply #23 on: February 23, 2013, 08:06:49 PM »
Mike, My stamp was a double strike but it measures 1/8" both date and unit stamp. George

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #24 on: February 23, 2013, 08:32:10 PM »
Excellent! That fills in the gaps and starts to show a pattern from the sample size below.

Late 1968
Trim Tag   Julian Date  Delco Stamp  Font size (1/8)
date      
shelf        334                    no      large
09C        199                   yes       large
10A        none                 yes       N/A
11A        310                   yes       large
      

1969        Julian Date   Delco Stamp  Font size (1/16)
Trim Tag
date
01C              002               yes      small
02D              055               yes      small
05A              120               no       small
06A              140               yes      small
07A              148               yes      small


 This sample size is showing that late 68 used the larger 1/8 font and in 1969 it switched to the smaller 1/16 fonts.
In regards to the Delco stamp, the 2 deviations in the list are from the booster I have on the shelf and the 05A booster.
    The one I have on the shelf may very well have had the front shell replaced when it was restored back in the 1980s when looks were more important than keeping numbers intact.
    The 05A booster *may* have had the shell replaced but I cant comment on that being its not mine and I dont know its history.
But the data here sure shows the smaller font began around the Jan 1969 period.

Thank you,
Mike
« Last Edit: February 23, 2013, 09:02:18 PM by Mike S »
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

x77-69z28

  • Hero Member
  • *****
  • Posts: 855
    • View Profile
Re: 9204 brake booster on ebay
« Reply #25 on: February 23, 2013, 10:04:14 PM »
Mike, I wonder if it was lightly stamped and was cleaned up when the booster was restored? It is definitely original to the car.
69 x77 burnished brown, 711 int 05A bought in 78
67 rs/ss 350 butternut yellow 4 speed 2nd owner
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
11 cts-v blk diamond  edition wagon 556hp sick!

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #26 on: February 23, 2013, 10:15:24 PM »
Mike, I wonder if it was lightly stamped and was cleaned up when the booster was restored? It is definitely original to the car.
  That could very well be the case. After I became more interested in this topic late last year I have looked at several original unrestored 69 boosters and many had such lightly stamped Delco markings that not all the characters were fully developed. So, if the metal is stripped down and polished during the restoration process then it's likely the remainder of the characters are removed.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

69Z28-RS

  • Hero Member
  • *****
  • Posts: 3025
  • owner since 4-Apr-1976
    • View Profile
Re: 9204 brake booster on ebay
« Reply #27 on: February 24, 2013, 03:16:26 AM »
Mike,

My car is a LATE 09C (Sept 1969)..  I'm sorry if that throws a kink in your data.. :)
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

Mike S

  • Hero Member
  • *****
  • Posts: 1302
    • View Profile
Re: 9204 brake booster on ebay
« Reply #28 on: February 24, 2013, 04:00:03 AM »

   If you are certain that is original to your car then that does throw a deviation in this for sure.  ???
Below is the updated list.

Late 1968
Trim Tag   Julian Date  Delco Stamp  Font size (1/8)
date     
shelf        334                    no      large
10A        none                 yes       N/A
11A        310                   yes       large
     

1969        Julian Date   Delco Stamp  Font size (1/16)
Trim Tag
date
01C              002               yes      small
02D              055               yes      small
05A              120               no       small
06A              140               yes      small
07A              148               yes      small
09C              199               yes      large
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

69Z28-RS

  • Hero Member
  • *****
  • Posts: 3025
  • owner since 4-Apr-1976
    • View Profile
Re: 9204 brake booster on ebay
« Reply #29 on: February 24, 2013, 05:27:46 AM »
TO my knowledge it has never been changed.   It was on the car when I bought it in 1976, and it's 'dated' appropriately for my 09C car??   but everything is speculation/educated guesswork after 44 yrs..  :)
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

tmodel66

  • Hero Member
  • *****
  • Posts: 1212
    • View Profile
Re: 9204 brake booster on ebay
« Reply #30 on: February 24, 2013, 08:22:12 PM »
Gary wasn't your booster painted black? If so it might have been changed therego the font and color. SWAG   
Daniel  
'69 SS 350/4 speed  Fathom Green--POP

69Z28-RS

  • Hero Member
  • *****
  • Posts: 3025
  • owner since 4-Apr-1976
    • View Profile
Re: 9204 brake booster on ebay
« Reply #31 on: February 24, 2013, 08:28:41 PM »
I just commented that it *could* have been, but when I cleaned it, there was also a residue of the gold chromating... so I suspect it was 'spray bombed' before I bought it in '76, and then I do remember 'touching up all the black'..      hot rodder that I was.. :)   I'm fairly certain this is the original booster; the two owners before me were not 'car people' (a teenage girl and an undercover policeman -  who had it only a short time).   The car had been kept washed/waxed and cleaned (appearance wise), but there had been little maintenance done in the '60K or so miles it had on it when I got it.   Of course, there's no way of knowing 40+ yrs later, or even 7 yrs later, when I purchased it.
Note:  The dates on the brake switch (9-199) exactly match the julian date on the booster; the master cylinder was dated 175... further making me believe all those parts are original to the car, as was 99-100% of the parts when I purchased it.
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan