Stage V Hemi replacement head vs Custom head

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  1. Bluefish

    Bluefish FBBO Gold Member FBBO Gold Member

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    Colleting parts to build a 12:1 572 Hemi in a N/A street/strip deal. Going into a 3400#car. Which head best fits the combo to produce 850-900hp? Dont know the port volumes, but the replacement head flows just over 400@.700 and the Custom head flow just under 500@.700 and about 400@.500". 727/8" 5500
     
  2. 6PKRTSE

    6PKRTSE Well-Known Member

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    I have Mopar (Edelbrock) heads that flowed 426 (no pun intended) @ .800 on my 528" Hemi with 10.5:1, street driven and makes slightly more that on motor on pump gas , more on race fuel and a ton more on both kits. So, your combo is definitely possible.

    rsz_20151008_074929.jpg rsz_20160414_201144.jpg IMG9505711.jpg
     
  3. Bluefish

    Bluefish FBBO Gold Member FBBO Gold Member

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    Ok, so you make a little more than 850 on pump gas? What size cam did you go with? Has it ever been down the track?
     
  4. 6PKRTSE

    6PKRTSE Well-Known Member

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    Yes and yes. Can't tell no more. We do alot of grudge racing around here.
     
  5. 6PKRTSE

    6PKRTSE Well-Known Member

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    Cam is a huge custom nitrous grind so kind of a pooch on motor, (sort of) as my buddies say. The convertor and on nitrous it really wakes up on spray.
     
  6. Bluefish

    Bluefish FBBO Gold Member FBBO Gold Member

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    wont be spraying it, just N/A deal. I was thinking 280/286@50, but i'm not sure whats needed with the hemi head.
     
  7. 68 HEMI GTS

    68 HEMI GTS Well-Known Member

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    I think a stage V or even a ported edelbrock from modern will get it done on that size engine with your compression and the right cam. I’m shooting for 800 on mine. We will soon see. 548, 11:1 street build.

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    • Thanks! Thanks! x 1
    • Bluefish

      Bluefish FBBO Gold Member FBBO Gold Member

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      thanks
       
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