What plugs for GT40-Y Alum heads ??

[Gearhead]

For N/A, I think it's Motorcraft AGSF-32C, but I don't know what these cross reference with for Autolite plugs?? :confused:

Anybody know ??


Thx

[aperacer]

crosses to an autolite 104

[89notch]

Spark Plug FAQ

Stock Heads also (Dart Windsor Jr & Sr)

Naturally Aspirated (non-projected tip)
NGK
Specifications:

Thread Size= 14mm
Hex Size= .625
Reach= .46
Seat Type= Tapered
Electrode= V-Power

NGK R5673-6 Stock Number 2405 (1 heat range hotter)
NGK R5673-7 Stock Number 2817 (Factory heat range)

Naturally Aspirated (non-projected tip)

Specifications:


Thread Size= 14mm
Hex Size= .625
Reach= .46
Seat Type= Tapered
Electrode= V-Power

NGK R5673-6 Stock Number 2405 (1 heat range hotter)
NGK R5673-7 Stock Number 2817 (Factory heat range)

Autolite Stock Heads

Autolite 25 Naturally Aspirated
Autolite 24 1 Heat Range Colder
Autolite 23 2 Heat Ranges Colder

Autolite Race Series for Stock Heads

Autolite AR135 Naturally Aspirated Only
Autolite AR134 1 Heat Range Colder
Autolite AR133 2 Heat Ranges Colder


NGK Forced Induction

NGK-Non Projected Electrode
Specifications:

Thread Size= 14mm
Hex Size= .625
Reach= .75
Seat Type=
Electrode= V-Power

R5673-8 Stock Number 3249
R5673–9 Stock Number 3442 for tons of boost and power.

Aftermarket aluminum heads (TFS, Edelbrock, AFR, Canfield, Brodix)

NGK Forced Induction

R5671-A8 Stock Number 4554, 1 heat range Colder (up to about 600rwhp)
R5671–A9 Stock Number 5238, for 18+psi, 2 heat ranges colder 650+ rwhp
R5671–A10 Stock Number 5820, for race cars.

Autolite Forced Induction and N/A

Autolite 3924's Naturally Aspirated Only
Autolite 3923’s 1 Heat Range Colder, good for approx 550rwhp
Autolite 3922’s 2 Heat Ranges Colder, good for approx 650rwhp

Autolie Race Series for aftermarket heads

Autolite AR3935 Naturally Aspirated Only
Autolite AR3934 1 Heat Range Colder
Autolite AR3933 2 Heat Ranges Colder

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)

[89notch]

4.6 4v 96-2001

The stock equivalent replacement part numbers according to the Motorsport Catalog are:

Ford MotorSport Part Number AGSF-42C

These plugs cross to:

NGK - TR55 Stock heat range
NGK BP6EFS (one colder)
Motorcraft AGSF-32C(one colder)
NGK BP7EFS (two colder)
Motorcraft AGSF-22C (two colder)
Champion RS9YC (two colder)

These are the 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 (3 Heat Range Colder)
NGK- R5724-9 Stock Number- 7891 (4 Heat Ranges Colder)
NGK- R5724-10 Stock Number- 7993 (5 Heat Ranges Colder)

[Gearhead]

Good info !! thx