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Thread: Power Adder Plug Guide

  1. #1
    Join Date
    Feb 2004
    Location
    Springboro, OH
    Posts
    6,275

    Power Adder Plug Guide

    5.0
    Stock E7 heads:
    AUTOLITE
    stock--stock 25 (5) [14m, .460 Reach, 5/8" Hex]
    1 step colder--24 (4) [14m, .460 Reach, 5/8" Hex]
    2 step colder--23 (3) [14m, .460 Reach, 5/8" Hex]
    -----AR133 (3) [*recessed tip, racing plug]
    -----AR132 (2) [*recessed tip, racing plug]
    -----AR131 (1) [*recessed tip, racing plug]

    NGK
    stock--(UR45) 6945 (Heat Range - 4) [14m, .460 Reach, 5/8" Hex]
    1 step colder--(UR55) 2248 (5) [14m, .460 Reach, 5/8" Hex]
    2 step colder--(UR6) 7773 (6) [14m, .460 Reach, 5/8" Hex]
    -----(R5673-8) 3249 (8) [*recessed tip, racing plug]
    -----(R5673-9) 3442 (9) [*recessed tip, racing plug]
    -----(R5673-10) 4050 (10) [*recessed tip, racing plug]


    GT40 Heads:
    AUTOLITE
    stock--765 (Heat Range - 5) [14mm, .708 Reach, 5/8" Hex]
    1 step colder--764 (4) or 104 (4) [14mm, .708 Reach, 5/8" Hex]**
    2 step colder--103 (3) [14mm, .708 Reach, 5/8" Hex]**
    -----AR473 (3) [*recessed tip, racing plug]
    -----AR472 (2) [*recessed tip, racing plug]

    **The difference between the 764 plug and the 104/103 plug is the thread. The 764 plug is a half thread whereas the 104/103 plug is a full thread. The full thread plugs are duplicates of the half thread plugs in every other aspect, they both protrude the same amount into the combustion chamber.

    NGK
    stock--(TR4) 3754 (Heat Range - 4) [14mm, .708 Reach, 5/8" Hex]
    1 step colder--(TR55) 3951 (5) [14mm, .708 Reach, 5/8" Hex]
    2 step colder--(TR6) 4177 (6) [14mm, .708 Reach, 5/8" Hex]
    -----(B8EFS) 1049 (8) [*recessed tip, racing plug]
    -----(B9EFS) 1085 (9) [*recessed tip, racing plug]

    TFS, Edelbrock, and AFR Heads:
    [14mm, 3/4" Reach, 5/8" Hex, gasket seat]
    AUTOLITE
    1 step colder--3924 (4) [*recommended starting point]
    2 step colder--3923 (3)
    -----AR3933 (3) [*recessed tip, racing plug]
    -----AR3932 (2) [*recessed tip, racing plug]
    -----AR3931 (1) [*recessed tip, racing plug]

    NGK
    1 step colder--(FR5) 3686 (5) [*recommended starting point]
    2 step colder--(BKR6EY) 3696 (6)
    -----(R5671A-8) 4554 (8) [*recessed tip, racing plug]
    -----(R5671A-9) 5238 (9) [*recessed tip, racing plug]
    -----(R5671A-10) 5820 (10) [*recessed tip, racing plug]

    MOTORCRAFT
    1 step colder--AWSF22C*
    2 step colder--AWSF32C


    4.6
    MOTORCRAFT
    stock--AWSF-32C (copper)
    1 step colder--AWSF-22C (copper)
    2 step colder--AWSFA-12C (copper)
    AGSF-32C--FRPP*heads

    NGK
    stock--TR-55/ 3951
    1 step colder--TR-6 4177
    1 step colder--NGK TR6
    1 step colder--NGK BR6EF*(Non-projected, resistor, v-groove copper)
    2 step colder--NGK BR7EF*(Non-projected, resistor, v-groove copper)
    2 step colder--BP7EFS [PN - 3526] BR7EF [PN - 3346]*
    2.5 step colder--R5724-8 [PN - 7317]*
    3 step colder--R5724-9 [PN - 7891]*
    4 step colder--R5724-10 [PN - 7993]*

    AUTOLITE
    stock--764
    1 step colder--103
    2 step colder--AR94
    3 step colder--AR93
    4 step colder--AR92

    CHAMPION
    YS-59C*

    DENSO
    stock--IT16
    1 step colder--IT20
    2 step colder--IT22*
    3 step colder--IT24

  2. #2
    Join Date
    Jan 2009
    Location
    Hillsboro, Ohio
    Posts
    7,916
    Great info there!
    1992 Mustang LX Coupe, 302, PA C4 and On3 70mm.
    1993 Reef Blue hatch, 347, 3550, and a kit.
    1992 Gould GT project...

  3. #3
    Join Date
    Jan 2010
    Location
    Pittsburgh, PA
    Posts
    298
    X2 thanks

  4. #4
    Join Date
    Aug 2007
    Location
    In a Van By the River !!!
    Posts
    4,670
    OK ... Where's the SVO Guide ??? LOL
    Aaron


    F**K Photobucket !!!

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