Proform Main Body (Holley)

Discussion in 'Technical' started by valleyracer, Jun 25, 2007.

  1. valleyracer

    valleyracer Member

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    1977 Maverick Drag car 399 engine,C4 trans,9"with 4.33 gear ET 10.25 @ 128 mph
    Is anyone running one of these? Did you change air bleeds? I have one that I couldn't seem to get to work properly, was thinking on ordering an air bleed kit to lower? I've already tried jetting and power valve plugs and still too much fuel but the engine shows lean???


    Richard
     
    valleyracer, Jun 25, 2007
    #1
  2. rayzorsharp

    rayzorsharp I "AM" a Maverick!

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    I am running a 750 Holley Proform on my 347 stroker. I bought the engine with carb already on it. As far as I know, there were no mods made to it and I have made none. It works great for me.
     
    rayzorsharp, Jun 25, 2007
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  3. valleyracer

    valleyracer Member

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    I think you have the whole carb from proform? My engine is a 306 cu in and I converted the 650 DP with the main body! It seems to me the air bleeds must be to big or something I am overlooking here?
     
    valleyracer, Jun 25, 2007
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  4. don graham

    don graham MCG State Rep

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    sorry, but i had the same problem and had a friend that is good with carbs try to tune it and couldn't. i changed to a holley 750HP and it was great right out of the box. i keep thinking of putting it back on and seeing what i could do with it again. hope someone can help.:)
     
    don graham, Jun 25, 2007
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  5. valleyracer

    valleyracer Member

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    I did the same thing bought a new 650DP and runs great, but I did tweak it to my old setup! Does the HP have screwin bleeds Don?
     
    valleyracer, Jun 25, 2007
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  6. valleyracer

    valleyracer Member

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    Anyone running a holley HP with screwin bleeds on a 302 or 351? What size bleeds are optimal?
     
    valleyracer, Jun 25, 2007
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  7. don graham

    don graham MCG State Rep

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    other than changing the jets and the idle, i haven't touched a thing. they do have screw in air bleeds but i haven't touched anything else.:)
     
    don graham, Jun 25, 2007
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