Spark plug reference for 7M/2JZ/RB26
1JZ/2JZ Reference
Found on driftworks forum:
I thought id share this useful spark plug information – most BASED ON TOYOTA SUPRA
Its based on 2JZ/RB26 but can and in most cases does apply to most 4,6,& 8 cylinder Jap Engines
Non turbo Cars
NGK – Standard – BKR5ES-11 (2382) – gap is already 1.1mm at the “-11” signifies they should be set to this already.
NGK – V-Power – BKR5EYA-11 (2526)
NGK – G-Power Platinum – BKR5EGP (7090) – gap to 0.8mm
NGK -Laser Platinum – BKR5EP-11 (3440)
NGK -OE Laser Iridium – IFR5T11 (4996)
NGK – Iridium IX – BKR5EIX-11 (5464)
Denso Platinum – PK16R11 – gap to 1.1
Stock TT
NGK – BCPR6EP-11 – gap is already 1.1mm at the “-11” signifies they should be set to this already.
NGK – BKR6E (2756) – gap 1.1mm
NGK Iridium – BKR6EIX-11 (3764)
Denso Platinum – PK20R11
Denso Iridium – IK20
TT @ upto 1bar
NGK – BCPR7ES (3330) – gap 0.9mm
NGK – BKR7E (6097) – gap 0.9mm
NGK – Iridium – BKR6EIX or BKR7EIX – leave gap alone
Denso Platinum – PK20R11 – gap 0.8mm
Denso Iridium – IK22 – leave gap alone
TT/hybrids @ upto 1.3bar
NGK – BCPR7ES (3330) – gap 0.7mm
NGK – BKR7E (6097) – gap 0.7mm
NGK – BKR8E – gap to 0.7mm
NGK – BCPR8ES (3330) – gap 0.7mm
NGK Iridium – BKR7EIX – leave gap alone
NGK Iridium – BKR8EIX – leave gap alone
Denso Platinum – PK20R8 – gap 0.7mm
Denso Iridium – IK22 – leave gap alone
Denso Iridium – IK24 – leave gap alone
Single Turbo/Big Twins @ upto 1.3bar
NGK – BCPR7ES (3330) – gap 0.7mm – COMMON ONE and cheap
NGK – BKR7E (6097) – gap 0.7mm
NGK – BKR8E – gap to 0.7mm
NGK Iridium – BKR7EIX/BKR8EIX – leave gap alone
Denso Iridium – IK24 – leave gap alone
Single Turbo/Big Twins @ upto 1.8bar
NGK – BCPR8ES – gap 0.6-0.7mm
NGK – BKR8E – gap 0.6-0.7mm
NGK Iridium – BKR8EIX – leave gap alone
Denso Iridium – IK27 – leave gap alone
Single Turbo/Big Twins @ 2+bar
NGK – BCPR8ES – gap 0.6mm ??? UNTESTED
NGK – BKR8E – gap 0.6mm ??? UNTESTED
NGK Iridium – BKR8EIX or BKR9EIX? – leave gap alone ??? UNTESTED
Denso Iridium – IK27 to IK31 – leave gap alone ??? UNTESTED
7M-GE and 7M-GTE Reference:
Copper
referentie # , bestelnummer # stock, koudegraad 6 Bijna stock, koudegraad 7 (1 kouder) w/ projected insulator, koudegraad 7 |
Irridium
referentie # , bestelnummer # stock, koudegraad 6 Bijna stock, koudegraad 7 (1 kouder) w/ projected insulator, koudegraad 7 |
Here is the NGK partnumber key.
The following content by Jeff (SupraTurbo527) from the mkiv.com list.
Well, to begin with…stock plugs on the Supra are the BKR6EP-11 2978, which is defined as:
(2978) stock plug – BKR6EP-11
B = Thread Diameter of 14mm
K = Construction type Hex Size 5/8″ w/ ISO Projection Tip
R = Resistor Type Plug
6 = Heat Range #6
E = 19mm (3/4″) thread reach
P = Platinum-type plug
-11 = x/10 – 1.1mm pre-gap (0.044″)
Now keeping that in mind, (in what the car calls for, and specs it requires) now lets compare the BCPR7ES(-11) 1095/3330 and the BKR7E(-11) 1283/6097 plugs:
(1095) BCPR7ES-11
B = Thread Diameter of 14mm
CP = Hex Size 5/8″ w/ projected insulator (which is out-of-spec)
R = Resistor, 7 = Heat Range #7
ES = Standard 3/4″ thread reach w/ 2.5mm diameter center electrode (which is prone to missfires)
-11 = x/10 – 1.1mm pre-gap (0.044″)
3330 is simply the BCPR7ES w/out the 1.1mm pregap (therefore gapped at 0.0315″)
(1283) BKR7E-11
B = Thread Diameter of 14mm
K = Construction type: Hex Size 5/8″ w/ ISO Projection Tip
R = Resistor Type Plug
7 = Heat Range #7
E (Stand-alone Digit) = V-Grooved center electrode w/ 1.5mm diameter electrode.
6097 is also the BKR7E w/out the 1.1mm pregap (0.0315″)