Tag Archives: denso spark plugs

DENSO Spark Plugs for Co-Generation Plants

Do you operate a co-gen plant?  You need top quality spark plugs which outperform the competition.  DENSO is one of the world’s leading innovators for ignition technology.  DENSO provides a variety of different plugs perfect for co-gen applications.

DENSO is an automotive components manufacturer. They are one of the world’s leading innovators for ignition technology. A part that DENSO manufacturers is their Iridium CoGeneration Spark Plugs, an important part for the gas engine industry. This post will: describe Iridium Saver Plugs and give DENSO parts numbers.

There are three Iridium Saver Spark Plugs that DENSO offers. These three are: Iridium Saver, Iridium Saver Performer, and Iridium Saver DDI.


The Iridium Saver uses original Iridium (Ir) and is the standard spark plug.

Spark Plugs for Co-Generation Plants
Iridium Saver

The Iridium Saver Performer uses gas compression. Benefits with this spark plug include greater durability, increased performance, and it includes that patented cross groove design (seen below).

Spark Plugs for Co-Generation Plants
Iridium Saver Performer

The Iridium Saver DDI uses bio gas. This spark plug has the highest durability and it uses double Iridium.

Spark Plugs for Co-Generation Plants
Iridium Saver DDI

Iridium Saver Spark Plugs are very high quality and premium products and will guarantee you product reliability. In addition, they are an OE Suppler (Waukesha, Cummins, GE Jenbacher, CAT, etc etc). Advantages & characteristics of Iridium Saver Spark Plugs include the following:

  • DENSO Patented Iridium – more longevity
  • Powder Sealing & Hot Lock – higher compression
  • Nickel Plating – increased corrosive resistance compared to the competitors
  • 360° Laser Welding – ensures stability
  • Monolithic Resistor – increased adhesion to high temperatures
  • High Dielectric Ceramic
Spark Plugs for Co-Generation Plants

Top = iridium alloy. Middle = 360° Robotic Laser Weld. Bottom = Nickel alloy


DENSO vs Competitors

Spark Plugs for Co-Generation Plants

Order Spark plugs for your co-gen plant with the links below.

DENSO Iridium Spark Plugs
Saver Saver PerformerSaver DDI
GI3-3 GI3-1GI3-5
GL3-3 GL3-1GL3-5
GE3-1 GE3-5
GT3-1
GE5-1
GN3-1A
GI3-1, GI3-3, GI3-5, GL3-1, GL3-3, GL3-5, GT3-1, Spark Plugs for Co-Generation Plants
GE3-1, GE5-1, GE3-5, GN3-1A, Spark Plugs for Co-Generation Plants

Post by Intella Liftparts

How to Decode DENSO Spark Plug Numbers

Here’s how to decode the Denso part numbers on our most popular spark plug. W16EXR-U11

Example: SK20HR11

S: 0.7 mm diameter iridium.

K: 14×16.0 (ISO Small Hex plug)

20: heat range.

H: 19.0 mm (Electrode position: 8.5 mm) 26.5 mm L 11.2 mm

R: With resistor

11: .2 mm gap

S Type of precious metalF Center: 0.55 mm diameter iridium. Ground electrode: 0.7 mm diameter platinum
P Platinum plug
S 0.7 mm diameter iridium
SV 0.4 mm diameter iridium
Z 0.55 mm diameter iridium
W K Thread Diameter and Hex SizeC 12×14.0
L 18×22.2 (Reach: 12 mm)
M 18×25.4 (Reach: 12 mm)
MA 18×20.6 (Tapered seat, Reach: 12 mm)
MW 18×20.6 (Reach: 12 mm)
J 14×20.6 (Projected plug)
K 14×16.0 (ISO Small Hex plug)
KJ 14×16.0 (ISO Projected Small Hex plug)
LP 14×20.6 (Plug for LPG applications)
N 10x 16.0
Q 14×16.0 (Small Hex plug)
QJ 14×16.0 (Projected Small Hex plug)
QL 14×20.6 (Small Hex long housing plug)
S 14×20.6 (Surface gap or Rotary)
T 14×16.0 (Tapered seat)
TR 14×20.6 (For marine applications)
W 14×20.6, 14×19.0 (Compact type)
X 12×18.0
XE 12×14.0
XU 12×16.0
U 10×16.0
Y 8×13.0
Z 1/2PFx23.8
16 20 Heat RangeDenso
9
14
16
20
22
24
27
29
31
32
34
35
NGK
2
4
5
6
7
8
9
9.5
10
10.5
11
11.5
Champion
18
16, 14
12, 11
10, 9
8, 7
6, 63, 61
4, 59
57
55
53
Bosch
10
9
8
7, 6
5
4
3
2
E ReachA 19.0 mm (Electrode Position: 7 mm)
21.5mm
B 19.0 mm (Electrode Position: 9.5 mm)
C 19.0 mm (Electrode Position: 5.0 mm)
D 19.0 mm (Shroud 2)
E (With Gasket) 19.0 mm 20.0 mm
E (Tapered Seat) 19.0 mm
F 12.7 mm
FE 19.0 mm (Half thread)
G 19.0 mm (Shroud 2.8) 19.0 mm (Shroud 3.0)
H 19.0 mm (Electrode position: 8.5 mm) 26.5 mm L 11.2 mm
M 8.6 mm
N (Taper seat, Half thread)17.5 mm
V (Tapered seat) 25.0 mm
None 9.5 mm 11.2 mm 19.0 mm 21.5 mm
None (Tapered seat) 8.3 mm 11.2 mm
XR PR Shape (Type)A Double ground electrodes
A Sland G.E. (For racing)
AY Double ground electrodes with bent shape (special) B Triple ground electrodes
BG Triple G.E. (shrouded)
D Quadruple G.E. Projected (2.0 mm projection) Projected (1.5 mm projection, spark position 3.5 mm)
E Shroud: 25
K Projected(1 mm projection)
LM Compact type (Hex Size: 20.6 mm)
M Shortened insulator head length
M Compact type (Hex Size 19.0 mm)
P Projected (1.5 mm projection)
R With resistor
S Non-projected (0mm projection)Single iridium T Double ground electrodes
TM Double ground electrodes
TN Double ground electrodes
V Slant ground electrodes
X Full projected(2.5 mm Projection)
-U -A Shape (Type)-A Specialty Specification
-B Specialty Specification
-C Cut-back G.E
-E Specialty Specification
-F Specialty Specification
-G Grease applied on to threads, for CNG applications -GL Platinum C.E.
-L Heat resistant G.E. Thin center electrode 3.5 mm projected insulator for motorcycles Retracted insulator formotorcycles
-M Larger G.E.
-N For Yamaha and Kawasaki
-P A double layer of platinum G.E. Single platinum -R 10K ohm resister plug
-S Semi-surface gap discharge type
-S Stainless gasket
-TP Taper-cut, single platium plug
-U U-Groove G.E
-US Star-shaped C.E
-V 1.3 mm diameter, nickel C.E.
-Z Taper cut
-ZU ZU plug
11 11  ReachA 19.0 mm (Electrode Position: 7 mm) 21.5mm B 19.0 mm (Electrode Position: 9.5 mm)
C 19.0 mm (Electrode Position: 5.0 mm)
D 19.0 mm (Shroud 2)
E (With Gasket) 19.0 mm 20.0 mm
E (Tapered Seat) 19.0 mm
F 12.7 mm
FE 19.0 mm (Half thread)
G 19.0 mm (Shroud 2.8) 19.0 mm (Shroud 3.0) H 19.0 mm (Electrode position: 8.5 mm) 26.5 mm L 11.2 mm
M 8.6 mm
N (Taper seat, Half thread) 17.5 mm
V (Tapered seat) 25.0 mm
None 9.5 mm 11.2 mm 19.0 mm 21.5 mm
None (Tapered seat) 8.3 mm 11.2 mm<
I Plug TypeA Double ground electrodes
A Sland G.E. (For racing)
AY Double ground electrodes with bent shape (special) B Triple ground electrodes
BG Triple G.E. (shrouded)
D Quadruple G.E. Projected (2.0 mm projection) Projected (1.5 mm projection, spark position 3.5 mm)
E Shroud: 25
K Projected (1 mm projection)
LM Compact type (Hex Size: 20.6 mm)
M Shortened insulator head length
M Compact type (Hex Size 19.0 mm)
P Projected (1.5 mm projection)
R With resistor
S Non-projected (0mm projection) Single iridium T Double ground electrodes
TM Double ground electrodes
TN Double ground electrodes
V Slant ground electrodes
X Full projected (2.5 mm Projection)
U Thread Diameter and Hex Size-A Specialty Specification
-B Specialty Specification
-C Cut-back G.E
-E Specialty Specification
-F Specialty Specification
-G Grease applied on to threads, for CNG applications -GL Platinum C.E.
-L Heat resistant G.E. Thin center electrode 3.5 mm projected insulator for motorcycles Retracted insulator for motorcycles
-M Larger G.E.
-N For Yamaha and Kawasaki
-P A double layer of platinum G.E. Single platinum -R 10K ohm resister plug
-S Semi-surface gap discharge type
-S Stainless gasket
-TP Taper-cut, single platinum plug
-U U-Groove G.E.
-US Star-shaped C.E.
-V 1.3 mm diameter, nickel C.E.
-Z Taper cut
-ZU ZU plug
27  Heat RangeDenso 16
20
22
24
27
29
31
32
34
35
NGK
12, 11
10, 9
8, 7
6, 63, 61
4, 59
57
55
53
Champion
5
6
7
8
9
9.5
Bosch
10
10.5
11
11.5 10
9
8
7, 6
5
4
3
2
A Special Design A Slant electrode, No U-Groove, No taper cut
B Projected insulator (1.5mm)
C No U-Groove
D No U-Groove, Inconel ground electrode
ES Stainless steel gasket
F Special
G Stainless steel gasket
J Spark position: 5 mm
K Spark position: 4 mm
L Spark position: 5 mm
M Spark position: 4 mm, for LPG applications
T For LPG applications
Y 0.8 mm gap
Z Taper cut
TT Twin-Tip

Post by Intella Liftparts