Hallo
Hoffentlich erschlaegt mich keiner fuer dieses posting, aber nach den
vielen Diskussionen ueber diverse Zuendkerzen nehme ich mal an, dass
Interesse an diesem Thema besteht.
Die folgende Liste habe ich mal irgendwann gefunden.
Falls jmd so etwas fuer andere Marken hat, *ich* hab immer Interesse
an sowas ;-)
Ciao Joachim
NGK SPARKPLUG CODES
===================
Here is the table of values for NGK spark plug names.
The breakdown is like this: [B] [CPR] [6] [E] [S] - [11]
Six fields. Some, e.g. the second field, are optional.
Some fields may have multiple letters.
Field one: Thread diameter.
A = 18mm B = 14mm C = 10mm D = 12mm
Field two: Construction.
C = hex size 5/8" K = hex size 5/8 with projected tip (ISO)
M = compact type P = projected insulator type
R = resistor SD = surface discharge for rotary engines
U = semi-surface discharge Z = inductive suppressor
Field three: Heat Range.
2 = hot, up to 10 = cold. There's no 1, I guess.
Field four: Thread reach.
E = 19mm F = tapered seat
H = 12.7mm (1.5") L = 11.2mm (7/16")
If this field is blank, an 18mm diameter plug has 12mm reach,
and a 14mm plug has a 9.5mm (3/8") reach.
Field Five: Firing end construction.
A, B = special design (no details given)
C = special ground electrode
G = racing use
GV = racing use V type
H = half thread
K = 2 ground electrodes for certain Toyotas
L = half heat range
LM = compact lawn mower type
M = 2 ground electrodes for Mazda rotary engine
N = special ground electrode
P = platinum tip (premium)
Q = 4 ground electrodes
R = delta ground electrode for BMW
S = standard 2.6mm centre electrode
T = 3 ground electrodes
V = fine-wire centre electrode, gold palladium
VX = platinum tip (high performance)
W = tungsten electrode
X = booster gap
Y = v-groove centre electrode
Field Six: (after the dash) Wide gap.
8 = .032" 9 = .036" 10 = .040"
11 = .044" there is no 12 13 = .050"
14 = .055" 15 = .060" 20 = .080"
Other notes:
There's more, such as for metal shell plugs, "V-Power" plugs
for North American made cars, and other stuff. I'm not typing it in.
Some Motorcycle-related comments...
Some bikes use the DR8ES-L plug. Theres's no indication what the 'L'
means; it does not appear in the symbol chart for field six.
Seeing as I specialize in Honda V4 info...
ST1100 (hey, it's a V4) : CR8EH-9
VF1100 : DPR8EA-9
VF1000 : DPR8EA-9
VF750, VF700 : DPR8EA-9
VFR750, VFR700 : DPR9EA-9
VF500 : DPR8EA-9
VFR750R (1990) : CR9EH-9
VFR750F (1990) : CR9EH-9
VFR750F (1991-92) : CR8EH-9
Extended-life platinum tip plugs replacing the CR9EH-9 are
available as CR9EHVX-9.
Resistor plugs are used for two reasons --
1. They cut down electrostatic interference.
2. They provide a sharper "edge" to the voltage spike, making for
a stronger, shorter spark. On high RPM motors, this is important.
The projected insulator simply describes the shape of the plug head.
A projected insulator sticks out a little further into the combustion
chamber.
--
email : j_heller@informatik.uni-kl.de
http : http://www.student.uni-kl.de/~jheller/INDEX_E.HTM
.de is an abbreviation for the german translation of Germany
and has nothing to do with Denmark
Gilera Net #133 rrr #none grr #none