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#1
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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...
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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 |
#2
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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 That's always a possible problem, part numbers superseded by GM.
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...................... John Brown This isn't rocket surgery..... |
The Following User Says Thank You to John Brown For This Useful Post: | ||
ScottG (01-04-2019) |
#3
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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.
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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. |
#4
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Engine code SP Dist. number 1112006
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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 |
#6
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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.
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...................... John Brown This isn't rocket surgery..... |
The Following User Says Thank You to John Brown For This Useful Post: | ||
ScottG (01-04-2019) |
#7
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Thank you Sir...
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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 |
#8
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Quote:
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. |
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ScottG (01-04-2019) |
#9
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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.
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The Following 2 Users Say Thank You to Flying Undertaker For This Useful Post: | ||
John Brown (01-04-2019), ScottG (01-06-2019) |
#10
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Thanks to all . I found one for $ 299.00 . Then I found one for $ 68.00 . Then the winner at $ 29.00 Evilbay search .
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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 |
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