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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Mustang Myth Busters: Spark Plug Clearance; Hipo mannys on GT40P heads

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    9/22/2022 12:24 PM  #26

    Ron68
    Senior 24-7 FYI Addict

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    From: Mukilteo, Washington
    Registered: 4/01/2013
    Posts: 1,540

    Re: Mustang Myth Busters: Spark Plug Clearance; Hipo mannys on GT40P heads

    Just a question - what is the difference or advantage of using the GT40P heads over the GT40 heads, which I have on my 351W with JBA shorty headers. The GT40 heads are off a 97 Explorer 5.0. Other than spark plug angle of course.

    68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     

    9/22/2022 9:58 PM  #27

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

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    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Mustang Myth Busters: Spark Plug Clearance; Hipo mannys on GT40P heads

    I believe the P heads have better compression 

    Its really me....I fixed my caps lock .
     

    9/23/2022 10:06 AM  #28

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,739

    Re: Mustang Myth Busters: Spark Plug Clearance; Hipo mannys on GT40P heads

    I 'believe' more "swirl & tumble" as the fuel mixture is sucked into the chamber. I TINK the valve-age (zata word?!)
    / the valves are actually smaller on the P-heads...
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

     

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  •  »  Mustang Myth Busters: Spark Plug Clearance; Hipo mannys on GT40P heads

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