Spark plug 101-000-035HJ Supply for Audi-90 2.8L 128KW Engine
The package includes 4pcs spark plug
General information about Iridium spark plugs.
Iridium is an extremely hard metallic element, related to platinum, which is thought to occur on earth primarily due to an enormous meteor impact millions of years ago. Other than it's hardness, the main property which makes Iridium attractive as an electrode material for spark plugs is its extremely high melting point (almost 2,500 deg C).
Since late in the 20th century Iridium has been used in alloy form as material of choice for construction of Spark plug and industrial igniter electrodes. Pure Iridium is difficult to work with, very brittle and does not have great electrical conductivity hence alloys are used to give the best combination of these properties. An Iridium alloy electrode is able to deliver good conductivity and extreme hardness. The result is that an Iridium electrode can be manufactured with an extremely small diameter, when compared to a traditional copper or even a platinum tipped electrode, without compromising the useful life of the electrode or spark plug. The narrow diameter concentrates the electrical charge and therefore a much lower voltage is required to jump the spark gap. This is beneficial in several ways:
A lower voltage is required, this reduces load on a vehicle's ignition system (less strain = less chance of failure)
A larger gap can be supported without increasing load on the ignition system (Larger gap = larger spark = more efficient combustion)
A more precise spark every time, delivered in the correct position and with the correct timing (More efficient combustion)
IRIDIUM POWER 4 Pack
Assuming a suitable Iridium plug is available, benefits you are most likely to see are:
Improved throttle response
Improved economy (though this depends largely on how much you enjoy the improved throttle response!)
Increased plug service life (Depending on design, an Iridium plug could last up to ten times the life of a standard plug with little reduction in efficiency over the plug's lifespan)
Increased engine power (Don't expect to double your horsepower but a 1 - 3% increase is possible)
Improved (reduced) emissions.
Will an Iridium spark plug be beneficial for my particular engine?
This is very subjective. The vast majority of vehicles/engines will benefit from replacing a standard spark plug with an Iridium spark plug. Most benefit will result if:
There is a very close Iridium spark plug match for your standard spark plug (i.e. overall design is very similar)
The standard spark plug you are replacing is a basic copper plug (the Iridium plug will then be a more significant upgrade)
The engine has a large cylinder capacity and a large number of cylinders
Least benefit will be realized if:
There is no close match for your standard spark plug, it isn't worth compromising plug design purely to use an Iridium plug type.
The standard plugs are already a performance or enhanced design. Some standard (Original Equipment) plugs are Iridium or fine wire platinum types, these may already provide the ultimate performance and service life for your particular engine. Fitting an aftermarket Iridium plug may actually result in a drop in performance and service life.
Denso Iridium Power Plugs
This is Denso's 'basic' performance Iridium spark plug range. Tried and trusted by performance enthusiasts worldwide. A traditional ground electrode is teamed with Denso's ultra fine 0.4mm Iridium alloy centre electrode to provide excellent performance. Service life for normally aspirated engines can be up to 30,000 miles but we would expect plugs to be past their best by this time, 20,000 miles is a more practical target and replacing after a shorter interval may provide greater savings in fuel economy.
There are a wide variety of designs and heat ranges from 14 (very warm) to 34 (extremely cold) in some designs. We keep the vast majority of designs and heat ranges in stock.
DENSO IRIDIUM is the Ultimate Long-Life Spark Plug
DENSOs Iridium Long Life plug is fast becoming the standard for todays high-tech engines.The properties of DENSOs patented Iridium alloy have broken through the spark plug technology barrier. Employing a revolutionary new 360 laser welding process, DENSO has created a spark plug unlike anything on the market today. Designed for durability under the most extreme conditions, DENSOs patented Iridium alloy is six times harder and eight times stronger than conventional platinum and can handle temperatures in excess of 4,000F.
At DENSO, we bring together everything we know as an OE supplier to provide aftermarket spark plugs that truly are Better by Design.
IRIDIUM LONG LIFE - Platinum ground electrode. 0.7mm diameter Iridium center electrode.
100% PRE-FIRED - All DENSO spark plugs are 100% pre-fired to assure the highest quality possible.
DENSO IRIDIUM POWER advantages :
- Reduce fuel consumption.
- More Horsepower.
- Higher Compressions.
- Better combustion / Less unburned fuel.
- More stability at idle / Less vibrations.
- Easier cold start.
- Better accelerations.
- 2 to 3 times more lifetime than classic spark plugs.
- Patented DENSO U-Groove system.
- Better resistance to high temperatures and corrosion.
- Slightly better performances than 0.6mm diameter Iridium spark plugs (NGK / OWS / OBX / Champion).
If you do not know which plugs fit your engine, please feel free to contact us.
Considerations When Using Nitrous Oxide
1.Try to avoid platinum (particularly double platinum) plugs.
2.Try to find a plug with a short ground electrode.
3.Try to find a 'non projected' plug.
4.Use a non resistor or Iridium type plug if available.
5.Use a colder heat range plug.
6.Learn by the mistakes of others.
Q1. I know my standard spark plug part number but how can I find a performance equivalent?
Please email us your original part number, using the contact form, we will provide a cross reference where available.
Q2. My engine has been tuned/modified, do I need a colder/hotter plug?
You should consult your engine tuner who should be able to advise you on the correct heat range to get the best from your engine. As a general rule, an engine may benefit from a colder grade of plug where modifications made have increased the temperature in the combustion chamber (increased turbo boost, nitrous oxide use, increased compression, ignition timing adjustments), a colder plug will conduct heat away from the firing tip more quickly and thus help reduce detonation/plug damage.
Q3. Will I get a noticeable power increase if I replace my standard plugs with Iridium plugs?
Increases are dependant on the type and state of the current plugs, number of cylinders, cylinder capacity and a host of other details. The biggest increases seem to be from large engined vehicles with a large number of cylinders (eg 3.0L V6 and above). Having said that, any improvement on a small engined vehicle will be more noticeable. Please refer to our Iridium spark plugs page for further information. If you are currently using very old/worn or incorrect spark plugs then replacing with a new set will almost always produce a noticeable increase in performance.