WhiteNoise

i have a 2001 gt, im gonna turn up the juice to a 100 shot and then im gonna get tuned for a 150 shot. i need new plugs and i cant find what spark plugs would work best with nitrous. If u throw a brand at me please let me now the P/N. Thanks

WhiteNoise

ok, o stole this from somewhere else. if anyone disagrees let me know.

4.6 Mustang GT
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .054
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Motorcraft AWSF-32C (copper); Autolite 764; Denso IT-16 (stock number 5325)

Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Motorcraft AWSF-22C (copper); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (two steps colder)
Heat Range: 7
Gap: Consult
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Motorcraft AWSFA-12C (copper); Autolite AR94; Denso IT-22 (stock number 5327)

Nitrous (two and a half steps colder)
Heat Range: 8
Gap: Consult
Plug: NGK R5724-8 (stock number 7317); NGK TR8IX (part number 3691); Denso IT-24 (stock number 5328)

Nitrous (three steps colder)
Heat Range: 9
Gap: Consult
Plug: NGK R5724-9 (stock number 7891); Autolite AR93; Denso IT-27

Nitrous (four steps colder)
Heat Range: 10
Gap: Consult
Plug: NGK R5724-10 (stock number 7993); Autolite AR92


4.6 Mustang Cobra (96-01)
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .054
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764; Denso IT-16 (stock number 5325)

Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Motorcraft AWSF-22C (copper); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (two steps colder)
Heat Range: 7
Gap: Consult
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Motorcraft AWSFA-12C (copper); Autolite AR94; Denso IT22 (stock number 5327)

Nitrous (two and a half steps colder)
Heat Range: 8
Gap: Consult
Plug: NGK R5724-8 (stock number 7317); NGK TR8IX (part number 3691); Denso IT-24 (stock number 5328)

Nitrous (three steps colder)
Heat Range: 9
Gap: Consult
Plug: NGK R5724-9 (stock number 7891); Autolite AR93; Denso IT-27

Nitrous (four steps colder)
Heat Range: 10
Gap: Consult
Plug: NGK R5724-10 (stock number 7993); Autolite AR92


4.6 Mustang Cobra (03-04)
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 6
Gap: .049 - .052 (have had better results with tighter gap)
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Motorcraft AWSF-22C (copper); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (one step colder)
Heat Range: 7
Gap: .035 - .038
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Motorcraft AWSFA-12C (copper); Autolite AR94; Denso IT-22 (stock number 5327)

Nitrous (two steps colder)
Heat Range: 8
Gap: Consult
Plug: NGK R5724-8 (stock number 7317); NGK TR8IX (stock number 3691); Denso IT-24 (stock number 5328)


5.0 Mustang 87-95
Thread – 14mm
Reach - .460”
Socket – 5/8 hex
Seat – Taper
Stock Heat Range: 4
Gap: .054
Plug: NGK UR45 (stock number 6945); NGK UR45IX (stock number 3207)

Nitrous (one step colder)
Heat Range: 5
Gap: .035 - .038
Plug: NGK UR5 (stock number 2771); NGK UR5IX (stock number 7177)

Nitrous (two steps colder)
Heat Range: 6
Gap: Consult
Plug: NGK UR6 (stock number 7773); NGK UR6IX (stock number 7348)


5.0 Mustang Cobra 93-95 w/ GT-40 Heads
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 5
Gap: .054
Plug: NGK TR55 (stock number 3951); NGK TR55IX (stock number 7164); Autolite 764 or 104; Denso IT-16 (stock number 5325)

Nitrous (one step colder)
Heat Range: 6
Gap: .035 - .038
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Motorcraft AWSF-22C (copper); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (two steps colder)
Heat Range: 7
Gap: Consult
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Motorcraft AWSFA-12C (copper); Autolite AR94; Denso IT-22 (stock number 5327)

Nitrous (three steps colder)
Heat Range: 8
Gap: Consult
Plug: NGK R5724-8 (stock number 7317); NGK TR8IX (stock number 3691); Denso IT-24 (stock number 5328)


Ford F-150 Lightning (99-04)
Thread – 14mm
Reach - .708”
Socket – 5/8 hex
Seat - Taper
Stock Heat Range: 6
Gap: .049 - .052
Plug: NGK TR6 (stock number 4177); NGK TR6IX (stock number 3689); Motorcraft AWSF-22C (copper); Autolite 103; Denso IT-20 (stock number 5326)

Nitrous (one step colder)
Heat Range: 7
Gap: .035 - .038
Plug: NGK BR7EF (stock number 3346); NGK TR7IX (stock number 3690); Motorcraft AWSFA-12C (copper); Autolite AR94; Denso IT-22 (stock number 5327)

Nitrous (two steps colder)
Heat Range: 8
Gap: .033 - .036
Plug: NGK R5724-8 (stock number 7317); NGK TR8IX (stock number 3691); Denso IT-24 (stock number 5328)

Nitrous (three steps colder)
Heat Range: 9
Gap: Consult
Plug: NGK R5724-9 (stock number 7891); Autolite AR93; Denso IT-27 (stock number 5329)

Adam90LX

The spark plug sizes and part number information appears to be correct. What does not look correct is the spark plug gap information. For example, on a stock 4.6 engine with coil on plug ignition (very efficient) the listed gap for stock heat range plugs is .054 (o.k.) and the gap for one heat range colder plug is .035? One heat range colder plug on a stock motor is usually used around the 150 to 200 hp spray levels, depending on my other factors of course, so do you really want to reduce the gap almost .020 for that small of a shot. Seriously, when I spray an engine with 600 hp of nitrous, I run the gap at around .030. If you figure around a .002 gap reduction per 50 hp of spray, you will definitely be on the safe side. Have fun with your increased spray!

Panic661

NGK TR6 part number 4177 from carquest or o'reillys ...I've always gapped mine at .032 and many guys I know with GTs gap the same. Wherever you go to tune, I'd ask the tuner as well.

01snake

NGK tr6's