holley carb question
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  1. #1
    Rods 'n' Sods Junkie vw2v8's Avatar
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    holley carb question

    should all 4 butterflyies open when i rev the car,at the moment only 2 open,its running a bit rough when i stick my foot down,tick over is fine any advise please thanks its on a rv8

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    no if it is a vacum secondery one the other two will only open with enough vacum in the intake manifold. Higher revs.

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    Holley carb

    Had similar problem,great on tickover and light throttle crap when i tried to give it some.Turned out to be float levels,went on you- tube put in how to set up holley? came up with box wrench video,very helpful

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    My name is Martin 30psi's Avatar
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    You need load on the engine in order to pull the vacuum required to open the secondarys.

    If you want to know whether the secondarys are the fault then jam them shut on the linkage.

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    you need to set up your pump shot and vacuum secondaries opening. Lots of guides on the net and good books for the 4150 carb. Real Steel sell everything you'll need. Not just a case of telling you how it's done, you need to experiement to see what suits your engine and driving style and it's better explained in the Holey books.

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