Whats the difference BAE stage 5.6.8

Discussion in 'PSI Superchargers Tech Questions' started by staflund, Sep 10, 2008.

  1. staflund

    staflund New Member

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    Whats the basic difference BAE stage 5 .6. or 8 heads. and what does peolpe use these days.
    What shift RPM is common.
     
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    staflund, Sep 10, 2008
  2. blwnaway

    blwnaway Member

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    Not sure about the 8 but 5 has a larger exhaust valve and smaller intake valve than the 6 and the 6 has a raised valve cover rail to prevent oil from spilling onto the zoomies with the cover off. Basically the 5 is a "Funny Car" head and the 6 was built for "Legal" Pro Modified cars with lower OD%
     
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    blwnaway, Sep 10, 2008
  3. blownapex

    blownapex Member

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    i also would like to know the difference
    between brad 4 and brad 5 pro mod
    exhaust port height and shape
    i think brad 6 has round exhaust ports
    thanks for any info
    duane rister
    618-781-4703
     
    #3
    blownapex, Sep 12, 2008

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