edelbrock secondaries???
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edelbrock secondaries???

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    77 sleek. corbin5754's Avatar
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    Default edelbrock secondaries???

    Ok I have a edelbrock 1410, when are the secondaries suposed to open. On mine they are not opening untill the throttle is all the way foward to its max, then it makes a clicking sound of them opening. and that's the only time they open. Is that how they are soposed to be or is there a tuning part you can buy to open them up sooner before its max throttle.

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    77 sleek. corbin5754's Avatar
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    Senior Member H20MOFO's Avatar
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    Dont know that much about edlebrock carbs but I THINK they are vacuum secondaries......so the answer is they will open up when you have enough vacuum. If you want them to open sooner.....I assume they sell a spring kit for the secondaries.
    Another Hot Boat refugee

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    Boat Nut sleekcrafter's Avatar
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    The early one you have to grind off the counter weights to make them oen sooner. Later and current carbs should be adjustable.
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    77 sleek. corbin5754's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    The early one you have to grind off the counter weights to make them oen sooner. Later and current carbs should be adjustable.
    Do u know where to adjust it at do u adjust the springs that's behind the choke.

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    Or Seth, either one Budweiser's Avatar
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    Quote Originally Posted by corbin5754 View Post
    Ok I have a edelbrock 1410, when are the secondaries suposed to open. On mine they are not opening untill the throttle is all the way foward to its max, then it makes a clicking sound of them opening. and that's the only time they open. Is that how they are soposed to be or is there a tuning part you can buy to open them up sooner before its max throttle.
    Are you having an issue with the way it runs? If so, what's the issue?

    -Seth-

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    Senior Member orange bahner's Avatar
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    Those are copies of the old Carter carb. The secondaries have 2 plates, the lower plates are directly hooked up to the throttle linkage and they usually don't start to open until 75% throttle and the upper plates will only open when there is enough engine vacumn to open them to prevent engine bog. They can be tuned by grinding the weights on the ends of the shafts to open sooner but too much will cause a bog.
    Last edited by orange bahner; 08-03-2012 at 05:18 PM.
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    77 sleek. corbin5754's Avatar
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    Quote Originally Posted by Budweiser View Post
    Are you having an issue with the way it runs? If so, what's the issue?

    -Seth-
    I just want the secondary's to open when there soposed. And not only at wot

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    AKA OhOneWS6 Last Mohican's Avatar
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    Quote Originally Posted by corbin5754 View Post
    I just want the secondary's to open when there soposed. And not only at wot
    WOT is pretty much when secondaries are suppose to open. Many people are baffled by the way the Carter secondaries work. They are good carbs. If you look at the throttle plate you will see it is opening as it should. What you are seeing from the top is similar to a choke plate to richen the circuit initially. Sounds to me like they are working correctly.

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    Senior Member orange bahner's Avatar
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    Secondary Main System:
    The Secondary Main System (Figure 5) delivers fuel only when thesecondary throttle blades and air valve are open. It ensures that fuel delivery varies with air flow.The Secondary Throttles (1) begin to open when the Primaries are about 65% open. The Primary andSecondary Throttles arrive at the WOT stop at the same time.Air flow through the Secondary side is controlled by Air Valves (2). These valves are located in thesecondary bores above the throttle blades. They are balanced against a counter weight and open toadmit additional air flow only if there is enough air velocity to allow the proper operation of the
    Secondary Auxiliary System
    During the initial stages of Secondary Operation, the air flow rate through the secondaries is very low.Accordingly, there is not enough pressure drop (suction) at the Secondary Nozzle to induce fuel flow.
    In order to prevent a lean A/F condition that would be experienced by the driver as a
    “bog” or “flat spot” on secondary opening, it is necessary to add fuel by an auxiliary means during the
    time the secondary is in the transient phase.
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    Senior Member orange bahner's Avatar
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    Maybe you should look into an Edelbrock AVS carb they have a tunable secondary air valve. See attached article.
    I have been running Carter carbs for over 37 years on the street and holleys when I race. This design is more suited for street drivability

    Edelbrock Carburetors | AVS - Adjustable Valve Secondary - Thunder Series - Super Chevy
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    77 sleek. corbin5754's Avatar
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    What about holly carbs when do there secondary's open such as a holly 850 double pumper.

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    Is it soposed to make a loud clicking noise when it opens cause there is no gradual opening on mine it stays shut the whole time untill it gets to its max then it opens and makes a clicking sound

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    Or Seth, either one Budweiser's Avatar
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    Quote Originally Posted by corbin5754 View Post
    Is it soposed to make a loud clicking noise when it opens cause there is no gradual opening on mine it stays shut the whole time untill it gets to its max then it opens and makes a clicking sound
    A little confused here.

    So, you are cruising, drop the hammer and you hear a clicking noise. So loud that, over all the wind noise, exhaust noise, etc. you can distinguish it's origin?

    Or are you just working the throttle in neutral or on the trailer trying to get the secondary air door to open when you hear the noise?

    This clicking sound... is it one click? Two or more? Does it happen and stop or continue clicking?

    -Seth-

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