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  1. #1
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    Default Questions on 70 Stage 1 Quadrajet

    A buddy of mine has a 1970 Stage 1 Qjet that he is wanting to sell and we want to make sure that we accurately represent the carb since the values can vary significantly based on details. This carb came from a real 70 GS Stage 1 some time back and was on a car and running within the last year, but I sure it could use a good freshening up. Any feedback is appreciated.
    Attached Images Attached Images

  2. #2

    Default Re: Questions on 70 Stage 1 Qaudrajet

    TechG8 is the guy to talk to on this - he's got all the stock specs and configuration well documented
    Rhett

    65 Gran Sport Convertible
    71 GS455 - Unconfirmed Stage1
    73 Gran Sport Stage1 4spd
    72 Pontiac Grand Ville Convertible

    71 GS455 Conv. 4spd Tribute - Sold, now a Swedish citizen
    66 Corvair Monza 140 4spd Convertible - Sold, presumed Hurricane Sandy victim

  3. #3
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    Default Re: Questions on 70 Stage 1 Qaudrajet

    Looks good so far.

    Are the secondary pullover enrichment holes below the air flap? That's a Stage1 tell. Can be seen in a pic from the rear, above if you can post one.

    Check the secondary rods..should be AU

    Does it have idle air bypass holes in the baseplate? These could be seen in a pic of the bottom of the baseplate. All the Stg1 carbs ive ever found did not have them, though regular 455 carbs did.
    Ken G
    www.everyday-performance.com
    or on facebook

    NE GS/GN
    72 Skylark 455Stg1 (the BS GS)
    83 Olds Cutlass (w/78 Buick 231 TURBO) PARTED OUT
    72 Skylark 350 w/ Nitrous (12.87 @ 104.79 on 100 shot) Black Mule
    "My mule dont like people laughin'..."


  4. #4
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Thanks for the feedback. Here are some pics of the requested areas. Thanks again!
    Attached Images Attached Images

  5. #5
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    Default Re: Questions on 70 Stage 1 Quadrajet

    It appears to have the features of a correct 70 Stage 1 Quadrajet.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  6. #6
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Let me know what you are asking for it I am looking for this particular date code

    Sent from my HTC6535LVW using Tapatalk
    HERB L.
    BOSTON, MA


    GNX #016
    GNX #132
    1986 WH1
    1984 Grand National
    1974 Apollo GSX
    1971 Stage 1 Auto
    1970 GSX Stage 1 Auto 10-10
    1969 Skylark Convertible
    1965 Riviera Custom
    1965 Riviera GS
    Finishline Built Stage 2 Iron Head Engine

  7. #7
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Here is the POE hole that Ken was referring to.
    On most Buick Quadrajets, they are above the secondary air valve, like in this picture.
    Buick Stage 1 and many 4 speed Quadrajets this hole is below the air valve.

    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  8. #8
    cjp69's Avatar
    cjp69 is offline Platinum Level Contributor
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Thanks for the picture and explanation Mark!

    Can you (or someone else) post the same picture of a stage 1 carb so we can see the POE hole on it?
    Chris

    70 Stage 1 4 speed for sale or trade

  9. #9
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    Default Re: Questions on 70 Stage 1 Quadrajet

    yea that's a legit 70 stg 1 carb. worth a bundle.

    has all the features. No idle air bypass holes in the channels off the primary bores in the baseplate. POE holes below the airflaps.

    The Stage1 secondary POE holes are in the same location as marks pic, just down maybe a half inch, below the air flaps' leading edge when closed. If you zoom on the pics the OP posted, tone can be made out in the pic with the air flaps open, the passenger side. I don't have a better pic to post unfortunately.
    Ken G
    www.everyday-performance.com
    or on facebook

    NE GS/GN
    72 Skylark 455Stg1 (the BS GS)
    83 Olds Cutlass (w/78 Buick 231 TURBO) PARTED OUT
    72 Skylark 350 w/ Nitrous (12.87 @ 104.79 on 100 shot) Black Mule
    "My mule dont like people laughin'..."


  10. #10
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Quote Originally Posted by cjp69 View Post
    Thanks for the picture and explanation Mark!

    Can you (or someone else) post the same picture of a stage 1 carb so we can see the POE hole on it?
    I can. Will do that tomorrow. I have a couple of Stage 1 carbs on hand.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  11. #11
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Having trouble getting pictures loaded today. Hopefully these work.
    This is a correct 70 Stage 1 7040246 that I will be restoring and it will be for sale.







    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  12. #12
    cjp69's Avatar
    cjp69 is offline Platinum Level Contributor
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Excellent, thanks Mark!
    Chris

    70 Stage 1 4 speed for sale or trade

  13. #13
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Thanks Mark (I haven't installed the new carb yet). Do you know if a 7040245 (70 350 4-sp) also has the POE holes below the flaps?

  14. #14
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Quote Originally Posted by Dano View Post
    Thanks Mark (I haven't installed the new carb yet). Do you know if a 7040245 (70 350 4-sp) also has the POE holes below the flaps?
    I am pretty sure they are under the flaps on most 4 speed Buick. Early ones anyway.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  15. #15
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    Default Re: Questions on 70 Stage 1 Quadrajet

    If you are curious why these stage 1 POE exit holes are under the flaps, here you go.

    The Pull Over Enrichment (POE), works like an accelerator pump for the secondary system. Brass tubes extend from the air horn in to the POE reservoir's in the main body. When the throttle opens up the secondary shaft, and begins to pull air, the suction pulls open the secondary air valves on the air horn, which lifts the secondary rods to allow fuel flow to the secondary system. The POE gives a shot of fuel to the secondary when the flow begins, and helps a quick smooth transition to the secondaries.

    With the exit holes under the air valves, the response is quicker. And for performance, quicker is better. The POE above the air valve requires the valve to open first before the reaction can occur.

    Since most have the POE above the air valve, for my performance and race builds, I make some adjustments and modifications to get the same result as under the air valve location. The POE can be relocated by drilling and plugging originals, but much easier to modify the air valves in my opinion.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  16. #16
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Excellent - thanks!

  17. #17
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Quote Originally Posted by carmantx View Post
    Having trouble getting pictures loaded today. Hopefully these work.
    This is a correct 70 Stage 1 7040246 that I will be restoring and it will be for sale.







    So the date code on this is? I am still looking for one Mark.
    John & Terry Kemper
    GSCA #4322
    BPG #1373


    70 Sportwagon

  18. #18
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Quote Originally Posted by staged70 View Post
    So the date code on this is? I am still looking for one Mark.
    January 15, 1970.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  19. #19
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Looks like it just ended on ebay

    Sent from my HTC6535LVW using Tapatalk
    HERB L.
    BOSTON, MA


    GNX #016
    GNX #132
    1986 WH1
    1984 Grand National
    1974 Apollo GSX
    1971 Stage 1 Auto
    1970 GSX Stage 1 Auto 10-10
    1969 Skylark Convertible
    1965 Riviera Custom
    1965 Riviera GS
    Finishline Built Stage 2 Iron Head Engine

  20. #20
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Quote Originally Posted by bostongsx View Post
    Looks like it just ended on ebay

    Sent from my HTC6535LVW using Tapatalk
    The op's?

    How much??

  21. #21
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    Default Re: Questions on 70 Stage 1 Quadrajet

    The one on eBay sold for $1500.
    It appears to be OP's carb.
    Mark
    72 Skylark "GSX" Convertible 462, SP 400, 4:10
    72 "GSX" 464, TH 400, 3:42 10.71@126, street tires and mufflers
    Quadrajet Power LLC
    Your one stop Quadrajet shop for parts, services and custom built Quadrajets
    mark@quadrajetpower.com

  22. #22
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    Default Re: Questions on 70 Stage 1 Quadrajet

    Seems like the going rate lately
    HERB L.
    BOSTON, MA


    GNX #016
    GNX #132
    1986 WH1
    1984 Grand National
    1974 Apollo GSX
    1971 Stage 1 Auto
    1970 GSX Stage 1 Auto 10-10
    1969 Skylark Convertible
    1965 Riviera Custom
    1965 Riviera GS
    Finishline Built Stage 2 Iron Head Engine

  23. #23
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    Default Re: Questions on 70 Stage 1 Quadrajet

    should have told him it wasnt and try to get it on the cheap!!
    Anson Favalessa

 

 

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