Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 01-03-2019, 07:50 PM
ScottG's Avatar
ScottG ScottG is offline
Yenko Contributing Member
 
Join Date: Nov 2011
Location: Oklahoma
Posts: 610
Thanks: 1,040
Thanked 211 Times in 92 Posts
Default Help understanding GM vacuum advance codes

I am looking for an original GM advance unit. 1970 Buick GS350. A search finds a lot of them . Most have an M or an MS at the top. Then a three digit number that looks like it could be the last three numbers of the part number? Then a 2 digit number that could be the degrees of advance it gives? Thanks for the help...
__________________
1971 Boss 351 , 17,000 miles .. 1971 Buick GS455 .. 2003 SVT Cobra .. 1971 GTO .. 1969 Camaro Fathom Green .. 1969 Camaro Hugger Orange .. 1970 Buick GS455 .. 1970 BUICK GS350 .. 1998 SVT Cobra 1900 miles;. 1973 STAGE 1 GS . 1971 Mach 1 351C 4 speed , first car. 1970 Mach 1 428 SCJ . 1970 SS 350 Camaro . 1971 442 ... 1968 Buick GS400 . 2015 Lexus IS 350 F Sport 2021 Badlands Bronco Sport
Reply With Quote
Click here to view all the pictures posted in this thread...
  #2  
Old 01-03-2019, 09:28 PM
John Brown's Avatar
John Brown John Brown is offline
Yenko Contributing Member
 
Join Date: Mar 2002
Location: South Bend, Indiana
Posts: 2,729
Thanks: 258
Thanked 407 Times in 191 Posts
Default

What is your distributor number?

As far as your assumptions go, I'd say you are correct. I can look up your distributor in an old (1981) Delco Remy breakdown book and give you the number it lists for the distributor. Only caveat is, some of the sheets have replacement numbers instead of actual O.E. numbers. That's always a possible problem, part numbers superseded by GM.
__________________
......................
John Brown

This isn't rocket surgery.....
Reply With Quote
The Following User Says Thank You to John Brown For This Useful Post:
ScottG (01-04-2019)
  #3  
Old 01-03-2019, 09:33 PM
BCreekDave BCreekDave is offline
Senior Member
 
Join Date: Sep 2016
Location: Dayton Ohio
Posts: 863
Thanks: 294
Thanked 410 Times in 227 Posts
Default

The 2 numbers are the max advance built into the can.

More than you want to know about this is here:

https://www.crankshaftcoalition.com/...ance_Specs.pdf

The only other thing I will add is always obey the rule and the rule is always use non-ported vacuum.
__________________
70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car

Last edited by BCreekDave; 01-04-2019 at 12:46 PM.
Reply With Quote
The Following 2 Users Say Thank You to BCreekDave For This Useful Post:
ScottG (01-04-2019), William (01-05-2019)
  #4  
Old 01-04-2019, 01:13 AM
ScottG's Avatar
ScottG ScottG is offline
Yenko Contributing Member
 
Join Date: Nov 2011
Location: Oklahoma
Posts: 610
Thanks: 1,040
Thanked 211 Times in 92 Posts
Default

Engine code SP Dist. number 1112006
__________________
1971 Boss 351 , 17,000 miles .. 1971 Buick GS455 .. 2003 SVT Cobra .. 1971 GTO .. 1969 Camaro Fathom Green .. 1969 Camaro Hugger Orange .. 1970 Buick GS455 .. 1970 BUICK GS350 .. 1998 SVT Cobra 1900 miles;. 1973 STAGE 1 GS . 1971 Mach 1 351C 4 speed , first car. 1970 Mach 1 428 SCJ . 1970 SS 350 Camaro . 1971 442 ... 1968 Buick GS400 . 2015 Lexus IS 350 F Sport 2021 Badlands Bronco Sport
Reply With Quote
  #5  
Old 01-04-2019, 02:37 AM
KenMaisano's Avatar
KenMaisano KenMaisano is offline
Senior Member
 
Join Date: Jun 2013
Location: So .Cal.
Posts: 446
Thanks: 0
Thanked 165 Times in 81 Posts
Default

Great info !
Reply With Quote
The Following User Says Thank You to KenMaisano For This Useful Post:
ScottG (01-04-2019)
  #6  
Old 01-04-2019, 03:06 AM
John Brown's Avatar
John Brown John Brown is offline
Yenko Contributing Member
 
Join Date: Mar 2002
Location: South Bend, Indiana
Posts: 2,729
Thanks: 258
Thanked 407 Times in 191 Posts
Default

My Delco book shows your distributor, number 1112006, uses a vacuum advance number 1116210. The sheet is dated 1978 and has about 25 different distributor numbers on it. I have no way of knowing what was changed on which of those distributors that caused that page to be updated. The short Delco number would be D1336. The 1116210 advance unit is stamped MS 210 16. I don't have any Buick parts catalogues from that time, but maybe you can find someone else that does.
__________________
......................
John Brown

This isn't rocket surgery.....
Reply With Quote
The Following User Says Thank You to John Brown For This Useful Post:
ScottG (01-04-2019)
  #7  
Old 01-04-2019, 12:38 PM
ScottG's Avatar
ScottG ScottG is offline
Yenko Contributing Member
 
Join Date: Nov 2011
Location: Oklahoma
Posts: 610
Thanks: 1,040
Thanked 211 Times in 92 Posts
Default

Thank you Sir...
__________________
1971 Boss 351 , 17,000 miles .. 1971 Buick GS455 .. 2003 SVT Cobra .. 1971 GTO .. 1969 Camaro Fathom Green .. 1969 Camaro Hugger Orange .. 1970 Buick GS455 .. 1970 BUICK GS350 .. 1998 SVT Cobra 1900 miles;. 1973 STAGE 1 GS . 1971 Mach 1 351C 4 speed , first car. 1970 Mach 1 428 SCJ . 1970 SS 350 Camaro . 1971 442 ... 1968 Buick GS400 . 2015 Lexus IS 350 F Sport 2021 Badlands Bronco Sport
Reply With Quote
  #8  
Old 01-04-2019, 12:47 PM
novadude novadude is offline
Senior Member
 
Join Date: Aug 2006
Location: PA
Posts: 739
Thanks: 3
Thanked 49 Times in 35 Posts
Default

Quote:
Originally Posted by BCreekDave View Post
The only other thing I will add is always obey the law and the law is always use non-ported vacuum.
Laws are made the be broken. Use what works best. On my car that is ported.

Ported was around since way before anyone ever thought about emissions. Don't believe all the garbage that gets regurgitated on the 'net about ported being for emissions only.
Reply With Quote
The Following User Says Thank You to novadude For This Useful Post:
ScottG (01-04-2019)
  #9  
Old 01-04-2019, 10:25 PM
Flying Undertaker Flying Undertaker is offline
Yenko Contributing Member
 
Join Date: Dec 2017
Location: Northeast Ohio
Posts: 257
Thanks: 57
Thanked 103 Times in 66 Posts
Default Help understanding GM vacuum advance codes

I have a May 1971 Delco TBA Parts Manual showing vacuum advance unit Delco part D 1328 for 70 Buick Special/ Skylark 350 v-8 Hi-compression as distributor # 1112006. It correlates to GM part #1116163. I hope this helps. Don.
Reply With Quote
The Following 2 Users Say Thank You to Flying Undertaker For This Useful Post:
John Brown (01-04-2019), ScottG (01-06-2019)
  #10  
Old 01-06-2019, 03:05 AM
ScottG's Avatar
ScottG ScottG is offline
Yenko Contributing Member
 
Join Date: Nov 2011
Location: Oklahoma
Posts: 610
Thanks: 1,040
Thanked 211 Times in 92 Posts
Default

Quote:
Originally Posted by Flying Undertaker View Post
I have a May 1971 Delco TBA Parts Manual showing vacuum advance unit Delco part D 1328 for 70 Buick Special/ Skylark 350 v-8 Hi-compression as distributor # 1112006. It correlates to GM part #1116163. I hope this helps. Don.
Thanks to all . I found one for $ 299.00 . Then I found one for $ 68.00 . Then the winner at $ 29.00 Evilbay search .
__________________
1971 Boss 351 , 17,000 miles .. 1971 Buick GS455 .. 2003 SVT Cobra .. 1971 GTO .. 1969 Camaro Fathom Green .. 1969 Camaro Hugger Orange .. 1970 Buick GS455 .. 1970 BUICK GS350 .. 1998 SVT Cobra 1900 miles;. 1973 STAGE 1 GS . 1971 Mach 1 351C 4 speed , first car. 1970 Mach 1 428 SCJ . 1970 SS 350 Camaro . 1971 442 ... 1968 Buick GS400 . 2015 Lexus IS 350 F Sport 2021 Badlands Bronco Sport
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:20 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

O Garage vBulletin Plugins by Drive Thru Online, Inc.