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- Carter Dual 4-Barrel Carburetor Adjustment
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- Buick Cam Specifications for 401 and 425 nailheads
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Thread: Intake spacer

  1. #1
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    Intake spacer

    Hi all,
    Has any of you used or have any information positive or negative in regards to the use of the 1Ē intake spacer. Between the intake and block. Considering one to raise intake slightly, but sure donít want to diminish performance.
    thanks for any and all responses !!

    Brian

    https://www.ebay.com/itm/Fits-264-32...UAAOSwPe1T85Fd
    Nailhead

  2. #2
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    each engine should be tested separately, but an intake spacer will almost always improve performance.

    it increases manifold volume, lengthens the effective runner length and, if plastic or wood, will help keep manifold heat out of the carb.

    good luck!
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  3. #3
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    Spacer

    Thanks for the reply Bob.
    Id sure think the same & agree. However there is an individual up in Northern California that says they only hurt power. I canít really see how or why. Iíd like one to give me a little more clearance with my dual quad & new valley pan. That spacer would be perfect, but I sure donít want reduced power. Lol

    any other opinions certainly appreciated!!

    thanks all,
    Brian



    i did receive this email from the gentleman that makes them after I enquired about performance.




    Check out the link. That is from another customer on the small nailhead that was on the dyno. Only one guy I know says they decrease power (won't name names) but the one in the picture increased on the dyno. Unfortunately I don't have the results since I didn't pay for the dyno time. Cam, carb, compression has a lot to do with risers, a worn out nailhead can't be used in the comparison.

    Thanks
    Nailhead

  4. #4
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    Spacer

    Before buying any kind of spacers crab or intake dnt forget to check hood clearance when engine is running and in both gears. Dnt want to run a shorter element or air cleaner for clearance. It will cancel out the performance end of it. Restricting the exhaust cross over helps with heating of the float bowls. And intake spacers due help for performance cams for power but stock cams they usually turn the nailheads into a gas hog.

  5. #5
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    You don't have to add a spacer to increase performance of a stock manifold. You can remove most of the center plenum as done by "Doc" with his 2X4 manifold here:
    https://www.teambuick.com/forums/con...-port-matching

    Once opened up, you can lower or remove the center divider for higher rpm range.


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  6. #6
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    That spacer would be perfect, but I sure donít want reduced power.


    spacers are pretty cheap. you can find them new for ~10 bucks and you can buy them all day long for $30.

    go to a swap meet, and you can probably get a guy to throw a carb spacer in with another purchase.

    get a spacer, go to a track or empty lot and make a couple of passes ( get a consistent time ), put the spacer on and see what happens. if it's bad, take it off.

    tain't rocket surgery.


    http://www.hotrod.com/articles/0601p...ap-horsepower/
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  7. #7
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    Quote Originally Posted by bob k. mando View Post
    That spacer would be perfect, but I sure donít want reduced power.


    spacers are pretty cheap. you can find them new for ~10 bucks and you can buy them all day long for $30.

    go to a swap meet, and you can probably get a guy to throw a carb spacer in with another purchase.

    get a spacer, go to a track or empty lot and make a couple of passes ( get a consistent time ), put the spacer on and see what happens. if it's bad, take it off.

    tain't rocket surgery.


    http://www.hotrod.com/articles/0601p...ap-horsepower/

    i agree Bob

    thank you to all that replied!!
    Nailhead

  8. #8
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    Brian,

    Of ALL the reply's on V8 I don't understand????
    Tom Telesco
    Classic and Muscle Automotive
    12 Cook St.
    Norwalk, CT 06853-1601
    Day Phone 203-324-6045 ET
    NailHead Mini-Starters '53-'66
    Adjustable Roller Tip Rocker Arms - All NailHeads
    Custom forged pistons
    Front & rear neoprene seals
    Many other "Nail" parts
    "If I can't get it, you don't need it!"

  9. #9
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    Quote Originally Posted by telriv View Post
    Brian,

    Of ALL the reply's on V8 I don't understand????

    Dont understand ?
    I posted the same question on both sites simultaneously.

    the other site gave me much better feedback. Iíve decided to just go with a carb spacer.
    i have a 1Ē intake spacer I would have loved to use, but not at reduced power. If it was a push or no benefit Iíd use it as I sure could use it for clearance with the new finned valley cover & dual quad intake.


    thank you
    Nailhead

  10. #10
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    I would have simply described the effects of a spacer are to increase the rpm range of the engine. That can be interpreted as it will increase power at higher rpm, usually about +1000 rpm, but it will be at the cost of low rpm power. The differences would not be significant enough to notice in normal driving and would require dyno testing to measure.

    This is shown on the sbc test chart on bob k. mando's link.
    Last edited by Bob; 05-14-2018 at 01:16 PM.


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