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first dyno pull
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<blockquote data-quote="johnh" data-source="post: 10962913" data-attributes="member: 9400"><p>Stole this from turbomustangs.com</p><p></p><p>Plug Specs for GT-40 Iron, GT-40 Aluminum, GT-40X, & GT-40P Heads</p><p></p><p>Thread Size- 14mm</p><p>Hex Size- .625</p><p>Reach- .708</p><p>Seat type- Tapered</p><p>Electrode- Standard Nickel</p><p>Projected Tip</p><p></p><p>The stock equivalent replacement part numbers according to the Motorsport Catalog are: </p><p></p><p>Ford MotorSport Part Number AGSF-32C for the GT-40 Aluminum, and GT-40X</p><p>Ford MotorSport Part Number AWSF-32C for the GT-40P, and GT-40 Iron</p><p></p><p>These plugs cross to:</p><p></p><p>NGK - BPR6EFS Stock Number- 3623 (Stock Heat Range)</p><p></p><p>Autolite- 104</p><p></p><p>These are the NGK Race Series Part numbers and specs:</p><p></p><p>Thread Size- 14mm</p><p>Hex Size- .625</p><p>Reach- .708</p><p>Seat type- Tapered</p><p>Electrode- V-Power</p><p>Non-Projected Tip</p><p></p><p>NGK- R5724-8 Stock Number- 7317 (1 Heat Range Colder)</p><p>NGK- R5724-9 Stock Number- 7891 (2 Heat Ranges Colder)</p><p>NGK- R5724-10 Stock Number- 7993 (3 Heat Ranges Colder</p><p></p><p>I use the NGK 7891 up to 550 hp and 7993 for more.</p></blockquote><p></p>
[QUOTE="johnh, post: 10962913, member: 9400"] Stole this from turbomustangs.com Plug Specs for GT-40 Iron, GT-40 Aluminum, GT-40X, & GT-40P Heads Thread Size- 14mm Hex Size- .625 Reach- .708 Seat type- Tapered Electrode- Standard Nickel Projected Tip The stock equivalent replacement part numbers according to the Motorsport Catalog are: Ford MotorSport Part Number AGSF-32C for the GT-40 Aluminum, and GT-40X Ford MotorSport Part Number AWSF-32C for the GT-40P, and GT-40 Iron These plugs cross to: NGK - BPR6EFS Stock Number- 3623 (Stock Heat Range) Autolite- 104 These are the NGK Race Series Part numbers and specs: Thread Size- 14mm Hex Size- .625 Reach- .708 Seat type- Tapered Electrode- V-Power Non-Projected Tip NGK- R5724-8 Stock Number- 7317 (1 Heat Range Colder) NGK- R5724-9 Stock Number- 7891 (2 Heat Ranges Colder) NGK- R5724-10 Stock Number- 7993 (3 Heat Ranges Colder I use the NGK 7891 up to 550 hp and 7993 for more. [/QUOTE]
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