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Thread: Are Edlebrock Performer 455 Olds heads worth the $$$

  1. #11
    V1800J
    Sorry, I did'nt mean main restrictors, but rather cam restrictors that sends more oil to the mains.

  2. #12
    Taylorman
    Sorry, I did'nt mean main restrictors, but rather cam restrictors that sends more oil to the mains.
    The main restrictors and oil resticted cam bearings do the same thing, that is, slow the oil down going to the top of the motor. Oil restricted push rods are also a good idea. Do yourself a favor and don't deal with Mondello, bad customer service. There are many other Olds specialists out there. I have been dealing with John or Dick at www.rocketracingperformance.com. They are familiar with Olds motors in jet boats.

  3. #13
    HotDogz
    Edelbrock heads flow better out of the box than iron heads ever will even with extensive porting done to them. Iron BB Olds heads flow like a SBC head will. Want to make real power with an Olds, ya need the Edelbrocks. :crossx:

  4. #14
    Taylorman
    Actually they flow 268 cfm intake and 188 exhaust out of the box at .600. Their are some guys porting C heads that are flowing 275/206 at .600. There are some aluminum heads out now that flow way more than the Edelbrocks. Bulldogs, Rocket Racing heads, Knowltons. Check this out.
    http://users.erols.com/srweiss/tablehdc.htm#Olds

  5. #15
    HotDogz
    The Knowlton Intake and Head combo are said to flow 350cfm @.600 lift. Dont know how much tho.
    Knowlton (http://www.mondellotwister.com/CylinderHeads.htm)

  6. #16
    Taylorman
    The Knowlton Intake and Head combo are said to flow 350cfm @.600 lift. Dont know how much tho.
    Knowlton (http://www.mondellotwister.com/CylinderHeads.htm)
    If they do flow that much, that will be awesome. To put that into perspective, AFR 315 BBC heads flow 348 at .600. Pretty good for Olds heads.

  7. #17
    HotDogz
    Yeah but I'm willing to bet the cost would be around $4000 at least for the package. Comes port matched and gasket matched tho. Maybe Santa will be nice to me this year.

  8. #18
    YeLLowBoaT
    350 cfm is a lot of air...I really don't see a "jet boat" motor using that much. lets not forget that the motor can only use so much air...Flow rates are not every thing.

  9. #19
    Taylorman
    350 cfm is a lot of air...I really don't see a "jet boat" motor using that much. lets not forget that the motor can only use so much air...Flow rates are not every thing.
    Your right about that.

  10. #20
    1899
    Ok, the junkyard motor has "G" Heads, Guess thats grocery getter heads. Havent checked on the bown up motor yet. I had no idea heads made that big of a difference in HP. Like bolt-on power. So if i get these hi-performance heads, am I stuck with Hi octane gas?
    Also, What kind of intake manifold are you guys running? I have the Performer Olds 455 #2151 as I mentioned, but Edelbrocks website says the Performer RPM heads require Manifold #7111. If thats true I cant upgrade heads without throwing away my manifold?
    And do you think I should stick with the stock rods?

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