440 cam suggestion

Engine, Trans & Driveline

  1. STREETREBEL

    STREETREBEL Well-Known Member

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    Low compression RV engine. Auto and 2.90 rear gear.
    67 Belvedere street car.
    Has an unknown aftermarket cam in it now. Has an awesome lope!
    But smells gas'y no matter what I do to stop it.
    Vacuum, floats, timing. Speaking of vacuum. It only has 7lbs.
    I think the cam is completely wrong for this engine. I've had this engine for 20 years and it's very reliable.
     
  2. Don Frelier

    Don Frelier FBBO Gold Member FBBO Gold Member

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    The larger Summit cam would help.
    Or a Whiplash cam if you like the choppy idle.
    But it is a 440 so it's going to have an exhaust smell no matter what.
     
    Last edited: May 7, 2021
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    • 68Moparmaniac

      68Moparmaniac Well-Known Member

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      Sounds like the lobe separation angle is too close, maybe look for a 110-112 LSA cam. Should also help with your vacuum issue.
       
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      • Brooks James

        Brooks James Member

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        What carb, Holley’s can be hard to tune especially double pumpers. Also could be your cam overlap.
         
      • 69a100

        69a100 Well-Known Member

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        What year motor?
         
      • PRHeads

        PRHeads Well-Known Member

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      • Babyblue66

        Babyblue66 Well-Known Member

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        Low compression and those gears I would suggest something similar to the smaller summit cam 6400, I also had a comp 270h in a low compression 440 and it ran really nice. There are many options out there.
         
      • 440 Charger

        440 Charger FBBO Gold Member FBBO Gold Member

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        440 does not like low compression.
         
      • Babyblue66

        Babyblue66 Well-Known Member

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        Mine made 415 hp, 462 ft lbs on the dyno with 7.5 to 1.
         
      • 440 Charger

        440 Charger FBBO Gold Member FBBO Gold Member

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        Not bad have this 11.3 to one.
         
      • 440 Charger

        440 Charger FBBO Gold Member FBBO Gold Member

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        Just looking for around 500.
         
      • 440 Charger

        440 Charger FBBO Gold Member FBBO Gold Member

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        What motor?
         
      • 66/440

        66/440 FBBO Gold Member FBBO Gold Member

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        Call Hughes, they make a cam specifically for low compression 440's to help build more cylinder pressure.
         
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