NGK one step colder spark plugs N54

Q: What does 1 step colder spark plugs mean?

Why go one step colder”? Running a colder” heat range spark plug will reduce temperatures in the combustion chamber by wicking more heat into the cylinder head. This reduces feedback knock and fine knock learning when running gasoline tunes. Recommended on ALL 2.5 WRX/STI making over 280 whp.

06-14-2017, 04:11 PM

Second Lieutenant

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Should I run one step colder spark plugs?
What does 1 step colder spark plugs mean?
What is the coldest NGK spark plug?
Do I need a hotter or colder spark plug?

Drives: 2008 BMW 335xi Coupe 6-Speed

Join Date: May 2013

Location: Quad Cities

Quote:

Originally Posted by N54 TuNeR

When is 2 heat range cooler plugs needed?

I pulled this off SparkPlugs.com
"A good rule of thumb: use one heat range colder for every 75�100hp added."

Here is the full article:

The term Heat Range refers to the speed with which a plug can transfer heat from the combustion chamber to the engine head. Whether the plug is to be installed in a boat, lawnmower or race car, it has been found the optimum combustion chamber temperature for gasoline engines is between 500�C�850�C. Within that range it is cool enough to avoid pre-ignition and plug tip overheating (which can cause engine damage), while still hot enough to burn off combustion deposits that cause fouling.

The spark plug design determines its ability to remove heat from the combustion chamber. The primary method used to do this is by altering the internal length of the core nose. In addition, the alloy compositions in the electrodes can be changed. This means you may not be able to visually tell a difference between heat ranges.
- When a spark plug is referred to as a �cold plug�, it is one that transfers heat rapidly from the firing tip into the engine head, keeping the firing tip cooler.
- A �hot plug� has a much slower rate of heat transfer, which keeps the firing tip hotter.

An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as adding a turbo or supercharger, increasing compression, timing changes, use of alternate fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature, necessitating a colder plug.

A good rule of thumb: use one heat range colder for every 75�100hp added.

In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70�C to 100�C from the combustion chamber.

The heat range numbering system used by spark plug manufacturers is not universal.

For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite.

Some manufacturers numbering systems are opposite the other - for Champion, Autolite and Bosch, the higher the number, the hotter the plug. For NGK, Denso and Pulstar, the higher the number, the colder the plug.

It is not recommended that you make spark plug changes at the same time as another engine modification, such as injection, carburetion or timing changes. Performing too many modifications or tune-ups at once will lead to misleading and inaccurate conclusions if any issues occur (an exception would be when the alternate plugs came as part of a single pre-calibrated upgrade kit).

When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.

__________________

2008 BMW 335xi Coupe 6-speed, 12.8 @ 107
2000 Chevrolet Corvette Z51, 11.4 @ 123
2005 Saturn Ion Redline, 14.1 @ 100 (sold Jun-2013)

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Description

Change Your Plugs and Reduce Misfires!

These NGK 5992 Laser Iridium replacement plugs are one step colder than Bosch on N54 engines and are well suited for higher than stock horsepower racing applications. The plug gap must be manually set using a gap tool to the suggested 0.022". The tighter gap and exposed electrode design typically results in fewer misfires at higher power levels than the Bosch plugs. The trade off is a 15-20k mile life span compared to the 20-30k life span of the Bosch plugs. These plugs are compatible with all turbo BMW motors including the N20, N54 and N55 Engine.

Replaces:

NGK 95770

The listing is for a single plug, you will generally need six when replacing your plugs.

Everyone knows spark plug changes are suggested every 20k miles or so for tuned vehicles and require replacement or regapping for higher than stock power levels. To make that job easier we offer a magnetic spark plug socket tool and an easy to use gapping tool. The magnet socket allows you to install and remove the plugs delicately without damage and our gapping tool lets you quickly set the gap without risk of damaging the plug.

Please Note

When installing the plugs with Precision Raceworks coils on the N55 engine, we recommend setting the gap down to 0.022"

Compatibility

These plugs are compatible with all turbo BMW motors including the N13, N20, N54, N55

Also fits CITROEN, DS, MINI & PEUGEOT models as well.

CITROЁN

C3 III (SX)

1.2 THP 110 (81 KW / 110 HP) (07/2016+)

C3 Aircross II (2R, 2C)

1.2 Puretech 110 (81 KW / 110 HP) (06/2017+)
1.2 Puretech 130 (96 KW / 130 HP) (07/2017+)

C3 III Box Body / Hatchback (SX, SY)

PureTech 110 (81 KW / 110 HP) (03/2019+)

C3 Aircross II Van (2C, 2R)

PureTech 82 (81 KW / 110 HP) (05/2019+)

C4 II Cactus

1.2 THP 110 (81 KW / 110 HP) (09/2014+)

C4 Spacetourer (3D_)

1.2 PureTech 130 (96 KW / 130 HP) (04/2018+)

Grand C4 Spacetourer (3A_, 3E_)

1.2 PureTech 130 (96 KW / 130 HP) (04/2018+)

C4 Cactus Van (0B_, 0P_)

PureTech 110 (81 KW / 110 HP) (05/2019+)

C4 Spacetourer Box Body / Estate (3D_)

PureTech 130 (96 KW / 131 HP) (05/2019+)

Grand C4 Spacetourer Van (3A_, 3E_)

PureTech 130 (96 KW / 131 HP) (05/2019+)

DS3 Hatchback

1.6 (120 KW / 163 HP) (01/2012 - 07/2015)

DS4 Hatchback

1.6 THP 150 (110 KW / 150 HP) (04/2011 - 07/2015)
1.6 THP 160 (120 KW / 163 HP) (04/2012 - 07/2015)
1.6 THP 165 (121 KW / 165 HP) (01/2012 - 07/2015)
1.6 THP 200 (147 KW / 200 HP) (04/2011 - 07/2015)

DS5 Hatchback

1.6 THP 150 (110 KW / 150 HP) (11/2011 - 07/2015)
1.6 THP 165 (121 KW / 165 HP) (01/2012 - 07/2015)
1.6 THP 200 (147 KW / 200 HP) (11/2011 - 07/2015)

DS3 Hatchback

1.6 THP 208 (153 KW / 208 HP) (09/2015+)

DS3 Convertible

1.6 THP 208 (153 KW / 208 HP) (09/2015+)

DS4 / DS4 Crossback

1.6 THP 150 (110 KW / 150 HP) (10/2016 - 12/2018)
1.6 THP 160 (120 KW / 163 HP) (07/2015 - 12/2018)

MINI

Clubman

Clubman (R55)

1.6 Cooper S (120 KW / 163 HP) (10/2007 - 02/2010)
1.6 Cooper S (128 KW / 174 HP) (10/2007 - 02/2010)
1.6 John Cooper Works (155 KW / 211 HP) (11/2007 - 06/2014)

Convertible

Convertible (R57)

1.6 John Cooper Works (155 KW / 211 HP) (08/2008 - 05/2015)

Coupe

Coupe (R58)

1.6 John Cooper Works (155 KW / 211 HP) (12/2010 - 05/2015)

Hatchback

Hatchback (R50, R53)

1.6 John Cooper Works (160 KW / 218 HP) (03/2006 - 09/2006)

Hatchback (R56)

1.6 Cooper S (128 KW / 174 HP) (10/2006 - 02/2010)
1.6 John Cooper Works (141 KW / 192 HP) (11/2006 - 02/2010)
1.6 John Cooper Works (155 KW / 211 HP) (11/2007 - 11/2013)
1.6 John Cooper Works GP (160 KW / 218 HP) (09/2012 - 11/2013)

Roadster

Roadster (R59)

1.6 John Cooper Works (155 KW / 211 HP) (11/2011 - 04/2015)

PEUGEOT

PEUGEOT 2008

2008 Estate (CU_)

1.2 THP 110 (81 KW / 110 HP) (01/2015+)
1.2 THP 130 (96 KW / 130 HP) (01/2015+)

PEUGEOT 208

208 I Hatchback (CA_, CC_)

1.2 THP (81 KW / 110 HP) (01/2013+)
1.6 GTi (147 KW / 200 HP) (08/2012+)
1.6 GTi (153 KW / 208 HP) (10/2014+)

PEUGEOT 3008

3008 I (0U_)

1.6 THP (110 KW / 150 HP) (06/2009 - 08/2016)
1.6 THP (120 KW / 163 HP) (01/2012 - 08/2016)
1.6 Turbo (121 KW / 165 HP) (05/2014 - 08/2016)

3008 II Off-Road (M_)

1.2 (96 KW / 131 HP) (05/2016+)

PEUGEOT 308

308 I Hatchback (4A, 4C)

1.6 (120 KW / 163 HP) (01/2012 - 12/2015)
1.6 16V (115 KW / 156 HP) (10/2009 - 10/2014)
1.6 GTi (147 KW / 200 HP) (07/2010 - 10/2014)

308 I SW (4E, 4H)

1.6 16V (115 KW / 156 HP) (10/2009 - 10/2014)

308 I CC (4B)

1.6 16V (115 KW / 156 HP) (06/2009 - 12/2014)
1.6 THP (147 KW / 200 HP) (10/2010 - 12/2014)

308 II Hatchback

1.2 THP 110 (81 KW / 110 HP) (11/2013+)
1.2 THP 130 (96 KW / 131 HP) (11/2013+)
1.6 GT 205 (151 KW / 205 HP) (06/2014+)

308 II SW

1.2 THP 110 (81 KW / 110 HP) (03/2014+)
1.2 THP 130 (96 KW / 131 HP) (03/2014+)
1.6 GT 205 (151 KW / 205 HP) (06/2014+)

PEUGEOT 5008

5008 I (0U_, 0E_)

1.6 THP 150 (110 KW / 150 HP) (02/2012 - 03/2017)
1.6 THP 163 (120 KW / 163 HP) (02/2012 - 03/2017)

5008 II

1.2 (96 KW / 131 HP) (12/2016+)

PEUGEOT 508

508 I (8D_) Saloon

1.6 (120 KW / 163 HP) (01/2012 - 12/2018)

RCZ Coupe

1.6 16V (147 KW / 200 HP) (06/2010 - 12/2015)
1.6 THP 150 (110 KW / 150 HP) (03/2011 - 12/2015)

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Should I run one step colder spark plugs?

A modified engine with higher cylinder temperatures will usually need a colder heat range spark plug. Generally, for every 75-100 hp you add, you should use a one (1) step colder heat range to be safe and avoid pre-ignition. The plug gap may also need to be adjusted smaller to avoid misfire.

What does 1 step colder spark plugs mean?

Why go “one step colder”? Running a “colder” heat range spark plug will reduce temperatures in the combustion chamber by wicking more heat into the cylinder head. This reduces feedback knock and fine knock learning when running gasoline tunes. Recommended on ALL 2.5 WRX/STI making over 280 whp.

What is the coldest NGK spark plug?

A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). Some NGK Racing Plugs are also available in half heat ranges. These are displayed as a 2 or 3 digit number after the hyphen.

Do I need a hotter or colder spark plug?

A colder heat range spark plug may be necessary if the ignition timing has been advanced to near the knock level. Higher cylinder temperatures near the knock level will bring the spark plug firing end temperature closer to the pre-ignition range.