« previous next »
Pages: [1]

Author Topic: 69 DZ302 Vacuum Advance B28  (Read 5426 times)

Ken Maisano

  • Newbie
  • *
  • Posts: 7
    • View Profile
69 DZ302 Vacuum Advance B28
« on: December 22, 2018, 06:06:36 AM »
Any idea were I can get one of these? All the crossover numbers also say they have been discontinued.

Thanks
Kenny
Logged

bertfam

  • Hero Member
  • *****
  • Posts: 4492
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #1 on: December 22, 2018, 03:48:07 PM »
Rock Auto has them. Do a search on DV1810. Auto Zone also carries them.

Ed
Logged

69Z28-RS

  • Hero Member
  • *****
  • Posts: 5781
  • owner since 4-Apr-1976
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #2 on: December 22, 2018, 04:25:33 PM »
GM still had them as of a few years ago...
Logged
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bertfam

  • Hero Member
  • *****
  • Posts: 4492
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #3 on: December 22, 2018, 05:01:38 PM »
Quote
GM still had them as of a few years ago...

They still do. The Chevrolet part number is 1973469 (AC Delco P/N D1390A)

Ed
Logged

69Z28-RS

  • Hero Member
  • *****
  • Posts: 5781
  • owner since 4-Apr-1976
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #4 on: December 22, 2018, 05:25:09 PM »
Related question:    Do any of you have a good 'home remedy' test for a vacuum advance unit (off the car)?   I've got a newly built '60 Corvette engine I'm trying to get going and I'm questioning right now if the vacuum advance is working correctly, but not sure how to test it...??
Logged
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bertfam

  • Hero Member
  • *****
  • Posts: 4492
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #5 on: December 22, 2018, 06:02:14 PM »
Suck into it and if it's bad, it won't hold the vacuum.

Ed
Logged

169INDY

  • Hero Member
  • *****
  • Posts: 1892
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #6 on: December 22, 2018, 07:53:17 PM »
You could use a mighty Vac Brake bleeder tool to adapt to the advance?

I will try to dig mine out an see.

JIM
Logged
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

JKZ27

  • Hero Member
  • *****
  • Posts: 559
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #7 on: December 23, 2018, 02:02:01 PM »
Quote from: 169INDY on December 22, 2018, 07:53:17 PM
You could use a mighty Vac Brake bleeder tool to adapt to the advance?

I will try to dig mine out an see.

JIM

That's right Jim, use a hand held vacuum pump. Should pull the arm in and hold vacuum.
Logged
John
69 RS/SS Cortez Silver, L48 MC1
68 RS Ash/Ivy Gold 327EFI M20

bertfam

  • Hero Member
  • *****
  • Posts: 4492
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #8 on: December 23, 2018, 03:37:55 PM »
Or you can save yourself a few bucks and do it the way I said in my reply #5!

Ed
Logged

JKZ27

  • Hero Member
  • *****
  • Posts: 559
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #9 on: December 23, 2018, 04:24:02 PM »
Quote from: bertfam on December 23, 2018, 03:37:55 PM
Or you can save yourself a few bucks and do it the way I said in my reply #5!

Ed


Honestly, thats exactly what I would do first, Ed.  :)
Logged
John
69 RS/SS Cortez Silver, L48 MC1
68 RS Ash/Ivy Gold 327EFI M20

bcmiller

  • CRG Member
  • *****
  • Posts: 4101
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #10 on: December 23, 2018, 04:35:11 PM »
What Ed said to do really does work! No cost.
Logged
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

69Z28-RS

  • Hero Member
  • *****
  • Posts: 5781
  • owner since 4-Apr-1976
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #11 on: December 23, 2018, 08:02:36 PM »
basically all the responses suggested 'pulling a vacuum' by 'sucking on it'... Personally I like the idea of using a mechanical device (rather than my mouth) .. :) ..  to suck on it!  :)

So basically you fellas are saying that if the vacuum can is still sealed, then the degree of vacuum advance should be correct?  Or is there some simple means to checking the degree of advance off the engine?
Logged
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

bertfam

  • Hero Member
  • *****
  • Posts: 4492
    • View Profile
Re: 69 DZ302 Vacuum Advance B28
« Reply #12 on: December 23, 2018, 09:16:23 PM »
that's correct. It either holds the vacuum or it doesn't. There's no "in-between".

Unless it's an aftermarket adjustable vacuum advance, it'll start pulling at whatever the spec is for that particular can. There's a small tolerance, but nothing worth mentioning.

Ed
Logged
Pages: [1]
« previous next »
 

anything