We hope you love the products we recommend and just so you know that as an Amazon Associate & J&P Cycles affiliate, MyEngineNeeds may earn from qualifying purchases.
Browsing for the best spark plug wires for Harley Davidson? If so, you’ve clicked at the right heading. You’ll find the top spark plug wires for your Harley Davidson in this text.
Many Harley Davidson riders change the spark plugs in the ignition system to improve engine performance. It’s better to swap out spark plugs to keep the car run in great shape. But people usually overlook the importance of replacing the spark plug wires.
Since these wires transfer that high voltage from the distributor to the spark plugs, they become worn out with time and need to be replaced. No matter how high-quality spark plugs you’re using, if the ignition wires are not of high performance, you won’t get the results you want.
In this article, we’ve brought the best spark plug wires for your Harley Davidson. We’ve well-researched these wires and checked if it fits Harley Davidson. The compatibility part has been done from our end so no need to worry about it.
After reviewing some of the top brands, you can walk through the buying guide to have an idea of their factors. Some queries about the spark plug wires will also be answered at the end of the article.
So let’s get started.
In a Hurry – Check the Availability of the Products.
 | Hot Fire Black Spark Plug Wire Set | 4.7 out of 5.0 stars |  |
 | ACCEL Red 8mm Super Stock Ferro-Spiral Core Wire Set | 4.5 out of 5.0 stars |  |
 | ACCEL 300+ Spark Plug Wire Set | 4.8 out of 5.0 stars |  |
Hot Fire Black Spark Plug Wire Set
Pros:
- Easy swap out.
- 40 Ohm resistance.
- Copper and Nickel conductor.
- 11.5 mm diameter.
- Kevlar core center.
Cons:
- Pricey.
This Hot Fire spark plug wire delivers high voltage power from the distributor to the spark plugs. It’s because of the inside conductor, which is made of an alloy of Copper and Nickel. You may know that Copper is the most conductive material. It can fully transfer the highest voltage to the spark plugs generated at the ignition system.
The wire also features a 40 Ohm resistance at each foot. Such a resistance enables the wires to transfer the energy while suppressing the Radio Frequency Interference and EMI. The terminals of the wire make a strong grip on the spark plug that ensures a fast transfer of the voltage without vibration. They have corrosion-free nature to ensure longevity.
These spark plug wires are 11.5 mm in diameter and are insulated on the outside. As the Copper wires give the highest conductivity from the inside, the outer insulation, which’s made of Fiberglass and Silicone Jacket, resist extreme temperature.
You can install these ignition wires in Dyna Wide Glide, Dyna Street Bob, and Softail Convertible Harley Davidson. Besides that, you can place these wires in many Harley models, which are given in the following table. The wires come in a set and are black. However, one downside of these wires is that they cost more.
Fitment Models
| Make | Model | Year |
|---|---|---|
| Dyna Defender | FXDP | 2001–2004 |
| Dyna Fat Bob | CVO FXDFSE | 2009 |
| Dyna Fat Bob | CVO FXDFSE2 | 2010 |
| Dyna Low Rider Convertible | FXDS CONV | 1999–2000 |
| Dyna Low Rider EFI | FXDLI | 2004–2006 |
| Dyna Low Rider | FXDL | 1999–2005, 2007–2017 |
| Dyna Low Rider | S FXDLS | 2016–2017 |
| Dyna Street Bob EFI | FXDBI | 2006 |
| Dyna Street Bob | FXDB | 2007–2017 |
| Dyna Street Bob | FXDBB | 2015–2016 |
| Dyna Street Bob | FXDBP | 2013–2016 |
| Dyna Street Bob Limited | FXDBC | 2016 |
| Dyna Super Glide 35th Anniversary EFI | FXDI35 | 2006 |
| Dyna Super Glide Custom Anniversary | FXDC | 2013 |
| Dyna Super Glide Custom EFI | FXDCI | 2005–2006 |
| Dyna Super Glide Custom | FXDC | 2005, 2007–2014 |
| Dyna Super Glide | CVO FXDSE | 2007 |
| Dyna Super Glide | CVO FXDSE2 | 2008 |
| Dyna Super Glide EFI | FXDI | 2004–2006 |
| Dyna Super Glide | FXD | 1999–2005, 2007–2010 |
| Dyna Super Glide Sport EFI | FXDXI | 2004–2005 |
| Dyna Super Glide Sport | FXDX | 1999–2005 |
| Dyna Super Glide T Sport | FXDXT | 2001–2003 |
| Dyna Switchback | FLD | 2012–2016 |
| Dyna Wide Glide | CVO FXDWG2 | 2001 |
| Dyna Wide Glide | CVO FXDWG3 | 2002 |
| Dyna Wide Glide EFI | FXDWGI | 2004–2006 |
| Dyna Wide Glide | FXDWG | 1999–2005, 2007–2008, 2010–2017 |
| Softail Convertible | CVO FLSTSE | 2010 |
| Softail Convertible | CVO FLSTSE2 | 2011 |
| Softail Convertible | CVO FLSTSE3 | 2012 |
| Softail Cross Bones | FLSTSB | 2008–2011 |
| Softail Custom | FXSTC | 2007–2010 |
| Softail Deluxe | CVO FLSTNSE | 2014–2015 |
| Softail Deluxe EFI | FLSTNI | 2005–2006 |
| Softail Deluxe | FLSTN | 2005–2017 |
| Softail Deuce | CVO FXSTDSE | 2003 |
| Softail Deuce | CVO FXSTDSE2 | 2004 |
| Softail Deuce EFI | FXSTDI | 2001–2006 |
| Softail Deuce | FXSTD | 2000–2007 |
| Softail Fat Boy Anniversary | FLSTF | 2013 |
| Softail Fat Boy | CVO FLSTFSE | 2005 |
| Softail Fat Boy | CVO FLSTFSE2 | 2006 |
| Softail Fat Boy EFI | FLSTFI | 2001–2006 |
| Softail Fat Boy | FLSTF | 2000–2017 |
| Softail Fat Boy Lo Anniversary | FLSTFB | 2013 |
| Softail Fat Boy Lo | FLSTFB | 2010–2016 |
| Softail Fat Boy | S FLSTFBS | 2016–2017 |
| Softail Heritage Classic Anniversary | FLSTC | 2013 |
| Softail Heritage Classic EFI | FLSTCI | 2001–2006 |
| Softail Heritage Classic | FLSTC | 2000–2017 |
| Softail Heritage EFI | FLSTI | 2006 |
| Softail Heritage | FLST | 2000–2003, 2005–2006, 2008–2010 |
| Softail Heritage Springer Classic EFI | FLSTSCI | 2005 |
| Softail Heritage Springer Classic | FLSTSC | 2005 |
| Softail Heritage Springer EFI | FLSTSI | 2001–2003 |
| Softail Heritage Springer | FLSTS | 2000–2003 |
| Softail Night Train EFI | FXSTBI | 2001–2006 |
| Softail Night Train | FXSTB | 2000–2009 |
| Softail Slim | FLS | 2012–2017 |
| Softail Slim | S FLSS | 2016–2017 |
| Softail Springer Classic EFI | FLSTSCI | 2006 |
| Softail Springer Classic | FLSTSC | 2006–2007 |
| Softail Springer | CVO FXSTSSE | 2007 |
| Softail Springer | CVO FXSTSSE2 | 2008 |
| Softail Springer | CVO FXSTSSE3 | 2009 |
| Softail Springer EFI | FXSTSI | 2001–2006 |
| Softail Springer | FXSTS | 2000–2006 |
| Softail Standard EFI | FXSTI | 2001–2006 |
| Softail Standard | FXST | 2000–2015 |
This list doesn’t end here. It goes on and many Harley models are included in this list. For more fitment models, visit the product on the website.
ACCEL Red 8mm Super Stock Ferro-Spiral Core Wire Set
Pros:
- Ultra-low resistance.
- High protective insulator.
- EMI/RFI suppression.
- 8 mm outside diameter.
Cons:
- Fits not every motorcycle.
- For Harley Davidson only.
With the ACCEL wire set, no need to worry about heat damage to your spark plug wires. The wires are wrapped by high-quality insulators that withstand 500-degree temperature. The product has the most conductive nature that delivers 5x faster energy from the distributor to the spark plugs.
This model allows you to start your Harley’s engine better and rapidly and increase its horsepower. Upon installing this plug wire in your Harley, you’ll experience maximum suppression in EMI/RFI. That’s because of the wire’s ultra resistive nature.
These ignition wires feature an 8 mm diameter which ensures maximum protection of the Ferro-Spiral Core and keeps it from all types of heat, oil, and moisture. The items are red and come in a pair.
The wires’ terminals are designed in such a way to deliver corrosion-free performance and ease the installation. They make a strong bite on the spark plugs to prevent opening during any vibration.
Softail convertible, Softail Deluxe, and Softail Standard Harley Davidsons are on the list of fitment models. It doesn’t end there but many more models are part of the fitment: Softail Fat Boy and Softail Heritage Classic.
Fitment Models
| Make | Model | Year |
|---|---|---|
| Softail Convertible | CVO FLSTSE | 2010 |
| Softail Convertible | CVO FLSTSE2 | 2011 |
| Softail Convertible | CVO FLSTSE3 | 2012 |
| Softail Cross Bones | FLSTSB | 2008–2011 |
| Softail Custom | FXSTC | 2007–2010 |
| Softail Deluxe | CVO FLSTNSE | 2014–2015 |
| Softail Deluxe EFI | FLSTNI | 2005–2006 |
| Softail Deluxe | FLSTN | 2006–2017 |
| Softail Deuce | CVO FXSTDSE | 2003 |
| Softail Deuce | CVO FXSTDSE2 | 2004 |
| Softail Deuce EFI | FXSTDI | 2001–2006 |
| Softail Deuce | FXSTD | 2000–2007 |
| Softail Fat Boy Anniversary | FLSTF | 2013 |
| Softail Fat Boy | CVO FLSTFSE | 2005 |
| Softail Fat Boy | CVO FLSTFSE2 | 2006 |
| Softail Fat Boy EFI | FLSTFI | 2001–2006 |
| Softail Fat Boy | FLSTF | 2000–2017 |
| Softail Fat Boy Lo Anniversary | FLSTFB | 2013 |
| Softail Fat Boy Lo | FLSTFB | 2010–2016 |
| Softail Fat Boy | S FLSTFBS | 2016–2017 |
| Softail Heritage Classic Anniversary | FLSTC | 2013 |
| Softail Heritage Classic EFI | FLSTCI | 2001–2006 |
| Softail Heritage Classic | FLSTC | 2000–2017 |
| Softail Heritage EFI | FLSTI | 2006 |
| Softail Heritage | FLST | 2005–2006, 2008–2010 |
| Softail Heritage Springer Classic EFI | FLSTSCI | 2005 |
| Softail Heritage Springer Classic | FLSTSC | 2005 |
| Softail Heritage Springer EFI | FLSTSI | 2001–2003 |
| Softail Heritage Springer | FLSTS | 2000–2003 |
| Softail Night Train EFI | FXSTBI | 2001–2006 |
| Softail Night Train | FXSTB | 2000–2009 |
| Softail Slim | FLS | 2012–2017 |
| Softail Slim | S FLSS | 2016–2017 |
| Softail Springer Classic EFI | FLSTSCI | 2006 |
| Softail Springer Classic | FLSTSC | 2006–2007 |
| Softail Springer | CVO FXSTSSE | 2007 |
| Softail Springer | CVO FXSTSSE2 | 2008 |
| Softail Springer | CVO FXSTSSE3 | 2009 |
| Softail Springer EFI | FXSTSI | 2001–2006 |
| Softail Springer | FXSTS | 2000–2006 |
| Softail Standard EFI | FXSTI | 2001–2006 |
| Softail Standard | FXST | 2000–2010 |
More on fitment models, visit JPCycles.
ACCEL 300 Spark Plug Wire Set
Pros:
- 8.8 mm thickness.
- High performance.
- 300% high current capacity.
- Stainless steel terminals.
Cons:
- No horsepower gain.
Before buying a spark plug wire, make sure that the product fits your Harley Davidson Models. Not all ignition wires work for every Harley model. This ACCEL wire set fits in Dyna Fat Bob, Dyna Super Glide Custom Anniversary, and Dyna Low Rider Convertible Harley Davidson.
The wires are not fit for Harley Models other than Dyna like Softail or Street Glide. You can head over to the above products for these Harley models. The wires come in black color only and have an 8.8 mm thickness.
The high voltage transfer from a distributor to spark plugs generates extreme heat that can damage, wear and tear the wires. To avoid this loss, the ACCEL has come up with this thick insulator that covers the inner conductive metal.
This special insulation also ensures optimum spark plug performance. And the current flow capacity increases by 300%. The corrosion-free terminals of the wires send maximum spark to the spark plug through the conductor.
Fitment Models
| Make | Model | Year |
|---|---|---|
| Dyna Defender | FXDP | 2001–2004 |
| Dyna Fat Bob | CVO FXDFSE | 2009 |
| Dyna Fat Bob | CVO FXDFSE2 | 2010 |
| Dyna Fat Bob | FXDF | 2008–2017 |
| Dyna Low Rider Convertible | FXDS CONV | 1999–2000 |
| Dyna Low Rider EFI | FXDLI | 2004–2006 |
| Dyna Low Rider | FXDL | 1999–2005, 2007–2017 |
| Dyna Low Rider | S FXDLS | 2016–2017 |
| Dyna Street Bob EFI | FXDBI | 2006 |
| Dyna Street Bob | FXDB | 2007–2017 |
| Dyna Street Bob | FXDBB | 2015–2016 |
| Dyna Street Bob | FXDBP | 2013–2016 |
| Dyna Street Bob Limited | FXDBC | 2016 |
| Dyna Super Glide 35th Anniversary EFI | FXDI35 | 2006 |
| Dyna Super Glide Custom Anniversary | FXDC | 2013 |
| Dyna Super Glide Custom EFI | FXDCI | 2005–2006 |
| Dyna Super Glide Custom | FXDC | 2005, 2007–2014 |
| Dyna Super Glide | CVO FXDSE | 2007 |
| Dyna Super Glide | CVO FXDSE2 | 2008 |
| Dyna Super Glide EFI | FXDI | 2004–2006 |
| Dyna Super Glide | FXD | 1999–2005, 2007–2010 |
| Dyna Super Glide Sport EFI | FXDXI | 2004–2005 |
| Dyna Super Glide Sport | FXDX | 1999–2005 |
| Dyna Super Glide T Sport | FXDXT | 2001–2003 |
| Dyna Switchback | FLD | 2012–2016 |
| Dyna Wide Glide | CVO FXDWG2 | 2001 |
| Dyna Wide Glide | CVO FXDWG3 | 2002 |
| Dyna Wide Glide EFI | FXDWGI | 2004–2006 |
| Dyna Wide Glide | FXDWG | 1999–2005, 2007–2008, 2010–2017 |
The fitment model list is long and you can find a spark plug wire for your Harley model. So head over to the JPCycles to check the fitment models.
BUYING GUIDE
This buying guide will open all the factors that you should consider before purchasing the best spark plug wires for Harley Davidson. The market is filled with various brands. You should choose a product that gives you the benefit you want. So go through this guide to know more about spark plug wires.
How Does A Spark Plug Wire Work?
A spark plug wire works just as other wires around. It transfers electricity from one point to another, a source to a receiver. In an ignition system, a high voltage source is a distributor and the spark plugs receive this high voltage.
The wire has two terminals: one is connected with the distributor and another with the spark plug. Via this ignition wire, high voltage energy goes to each spark plug from the distributor. This is how spark plug wire works.
You might be thinking if spark plug wire works just like other wires, why do we use this special wire rather than other normal wires? Well, electric wires in a home have 120 – 240 voltage. The spark plug wires have 10,000 – 12,000 volt electricity. Since they transfer high voltage, they’re thicker and better to use in an ignition system.
Why Choose These Best Spark Plug Wires For Harley Davidson
The ACCEL and Hot Fire spark plug wires which are reviewed in this article are a reputable spark plug wire brand. They manufacture quality ignition wires that deliver maximum voltage to the spark plugs.
The above wires are compatible with Harley Davidson only, not for other vehicles. Also, double-check if the type of wire you want fits your Harley model. Because some wires might be fit for one Harley model and some for others. You can go through the fitment model for that reason.
How To Install Spark Plug Wires On A Harley?
Installing new spark plug wires is a simple process. Connect one terminal of a wire with the distributor and the other terminal with the spark plug. If you’re installing more than one wire, a short wire connects the distributor with the nearby plug. And the longer wire joins the distributor with the spark plug at a distance. The wires will have a color or code so that you install the right wire with the right spark plug, don’t mix them.
Key Features of the Best Spark Plug Wires for Harley Davidson
Below are the key features of the ignition wires. Look for these aspects to pick the best spark plug wires for Harley Davidson.
Stainless Terminals
The terminals play a big part in the ignition wires. They should resist corrosion to deliver long-lasting performance. With these terminals, the wire is connected with the distributor and the spark plug.
They should make a strong bite on the spark plug to prevent unplugging during vibration. If the terminals are not tightened well, they may lack transferring high voltage to the spark plugs. They become less effective if they get rust. Pick corrosion-free terminal spark plug wires
High Resistive
The spark plug wires you want to buy should have high resistance. Generally, the ignition wires feature high resistance but some wires have low resistance. The benefit of high resistive wires is that it reduces the frequency interference.
Your vehicle’s sensors, computer systems, and radio won’t be affected by the electromagnetic waves generated around the ignition wires if you choose high resistive wires. The spark plug wire resistance ranges from 8,000 to 12,000 ohm per foot. So the bottom line is to pick a high resistive spark plug wire.
Copper Conductor
In the ignition wires, the conductive material should be Copper. It has a high conductive nature. Since the spark plug wires deliver around 10,000-volt electricity from the distributor to the spark plugs, a high conductive material is better for transferring. It gives maximum voltage to the spark plug at the right moment.
Compatibility
Look if the type of spark plug wire you want to buy matches your vehicle or not. Like you’ve seen above, some products were fit for Dyna Harley, and many work fine with Softail Harley. In the case of ignition wire types, the distributed resistance wire fits most American cars.
If you own a Japanese vehicle, inductance wires should be your choice. And for European cars, the fixed resistor wires work effectively. So when you’re out purchasing ignition wires, do check the fitment.
Number of Spark plugs
Since vehicles have different numbers of spark plugs, you’ll also need to buy a separate wire for each plug. Some wires divide into multiple wires to fit onto each spark plug. If your car has three spark plugs, you’ll need three either separate wires or one wire with three other ends.
See what works best for you: Separate wires for each plug or one with multiple terminals. Usually, spark plug wires come in a set, so opt for such wires to fit them onto the plugs. If you’ve used a separate wire for each spark plug before, do the same and buy a separate wire per plug.
Benefits of Spark Plug wires
Increases engine performance
New spark plug wires improve your vehicle engine performance. The old wires which you’ve been using for years have been worn out due to high temperature and heat energy. They no longer transfer enough spark to the spark plugs.
You’ll have trouble starting your engine. And the car accelerates slowly. When you install new ignition wires, they deliver maximum spark to the plug and hold it which increases the engine’s operation.
Improves gas mileage
If you’re driving with a bad spark plug wire, you’ll need more stops at the gas station. Years-used ignition wires reduce gas mileage which in turn cost you more. On the other hand, installing high-quality ignition wires sends a big spark to the plugs which start quicker and the engine becomes more effective.
Studies have found that quality spark plug wires increase gas mileage by 4%. And spark plugs with low spark reduce fuel efficiency by 30%. This is the reason why spark plug wires not only increase your engine’s performance but also improves its gas mileage.
Save Money
Using better quality ignition wires saves your money. They will not wear out from the high voltage transfer. So less new spark plug wire installation, hence low expenditure. If you don’t renew your spark plug wires, the spark plugs will be damaged after constant low voltage. They’ll cost you more than replacing new wires only. Saving money is the main benefit of installing new spark plug wires.
Reduce Radio Frequency Interference (RFI)
The ignition system in your car affects radio frequency. If you listen to the radio while driving, you’ll hear a lot of noise and fading. That’s the ignition system that is interfering in the radio frequency.
However, using good-quality spark plug wires lowers the interference. Carbon spark plug wires show high resistance to the other frequency around. They also reduce interference in other sensors and computer systems in your car, especially when you’re receiving a call. Reduction in the RFI is another essential benefit you can get from new ignition wires.
Types of Spark Plug Wires
Below are the four types of spark plug wires. They provide several benefits to the ignition system and your car. Reading these wire types will ease your decision on which one fits your needs so that you end up buying the best spark plug wires for Harley Davidson.
Distributed Resistance Wires
Such wires have great resistive material. It’s made of Carbon and Fiberglass that deliver super high resistance to radio frequency interference. Due to this feature, most vehicles have the distributed resistance spark plug wires for energy transfer.
One of the reasons why most cars have distributed resistance wires installed is that they reduce the RFI, which in turn helps decrease the radio noise. So fade-free radio sound. You should also pick this type of wire for your Harley. Because numerous American vehicles use these wires in the ignition system.
Magnetic Resistance Wires / Inductance Wires
In most Japanese cars, you’ll see inductance wires that do the energy transfer job from the distributor to the spark plugs. Such wires have a spiral core of either Copper or Nickel or maybe an alloy of both. It creates an electromagnet that prevents RFI and assures maximum current flow.
Fixed Resistor Wires
Another type of spark plug wire is the fixed resistors wires, mostly found in European vehicles. These wires are either made of Steel or Copper. In this category, Copper wires are better than steel. Because they have more conductive than Steel, hence quick energy transfer. The fixed resistor wires feature resistors at spark plug boots, that’s why they’re named fixed resistor wires.
Other Considerations
These are some of the consideration factors to check out in your product before opting for one for yourself. The aspects will be handy in buying the best spark plug wires for Harley Davidson.
Length:
This is another essential factor you should double-check. It’s the reason why people end up buying short wires. When you want to purchase new spark plug wires, their length should be the same as the old ignition wires. Or if you don’t have the previous wires, measure the distance from the distributor to the spark plug and then get wires of that size.
Order:
After the purchase, avoid connecting wires with the plug randomly. Check the number or code on the wires and see what matches which spark plug. Join the right wire with the right spark plug to ensure maximum engine performance and prevent any damage.
Top Brands
The two brands below produce top-notch wires for every type of vehicle. If you also pick the ignition wires from these brands, you’ll end up buying the best spark plug wires for Harley Davidson. Luckily, the above products we’ve reviewed are also from the following brands.
ACCEL
For the last 40 years, ACCEL is a US-based brand that makes high-performance spark plug wires. Other products of the brand include digital fuel injection systems, distributors, rotors, ignition wires, and caps. ACCEL ignition wires have high protective insulators and help you reduce the RFI.
Hot Fire
This is another top spark plug wire brand, Hot Fire. It leads the market in manufacturing high conductive spark plug wires. The conductive material is either Copper or Nickel. The wires are also the thickest in diameter than other wires in this article. So if you’re looking for the top brand, Hot Fire makes the best spark plug wires for Harley Davidson.
Spark Plug Wire Pricing
Spark plug wires price doesn’t matter but you should notice their features if you can get those aspects at a low-cost wire, you should opt for that. Why spend more when a normal price wire delivers the quality. Following are the two categories of spark plug wires in terms of the price.
$20 – $40
This category spark plug wires have great performance but they’re not as thick as the following type of ignition wires. It affects the RFI but at a low level. However, these wires come in a set and you may not need more wires for fitting them onto the ignition system.
$40 +
The spark plug wires that cost more than 40$ have a wider diameter than the above category wires. Such wires have high resistance with low-frequency interference. You’ll also experience 5 times more energy transfer to the spark plug with the help of these wires. The thickness of these wires is 11 mm plus.
Also read: Best short antennas for Harley Davidson
FAQs
Do high-performance spark plug wires make a difference?
High-performance spark plug wires transfer high voltage to the spark plug, hence perfect spark at the right interval. Which results in better engine performance. Quality wires also ensure a reduction in radio frequency interference. This saves other sensors and computer systems in your car from any interruption in their operation. High-performance spark plug wires boost your engine performance and save you money as well.
Does it matter what spark plug wires you use?
Yes, it does matter the type of spark plug wires you use. They have many factors you need to explore before using them. Spark plug wires should have the right resistance as needed per your engine and for the type of vehicle you have.
The length of the wires also matters. A longer wire has more resistance than a short wire. The wires should not be short enough that you can join one terminal at the distributor but not the other terminal at the spark plug. It should be of the exact length as needed.
Check if the type of wire you use fits your car or motorcycle. Not every spark plug wire fits each vehicle, especially in the case of Harley Davidson motorcycles.
What’s better, 7mm or 8mm spark plug wires?
7 mm and 8 mm spark plug wires don’t make the real difference because they’re almost of the same size. If one was at 4 mm and another was at 12 mm, then it makes the difference. A thicker wire is more resistive compared to a thin wire. As you know high resistive wires reduce RFI, the 8 mm spark plug wires have higher resistance compared to the 7 mm wires. So the former one has more resistance than the latter one.
Can spark plug wires increase horsepower?
No, a new spark plug wire does not increase a vehicle’s horsepower. It has a relation with the engine wires. However, upon installing new ignition wires, you’ll experience a boost in the engine’s performance. And feels as if the horsepower has increased.
It’s because you’ve been using old wires which are being worn out and were delivering bad performance. The new spark plug wires enable the engine to work at its peak level. The level for which it has been made for. And that has been affected by the worn-out old wires. That’s why you feel improvement in the engine’s operation. The horsepower remains the same.
How much resistance should a spark plug wire have?
Resistance in spark plug wires varies and depends on the type of vehicle. What model car do you have and how much resistance does it need for high performance? You should check this out from the instruction manual of your car.
However, spark plug wires in most cars have 10,000 to 12,000 Ohm per foot. Ohm is the unit of resistance and it’s measured per foot in ignition wires. Some wires have ultra-low resistance, under 100 ohms. These low resistive wires will make high-frequency interference. So the ideal resistance should be around 10,000 ohms.
What happens if you put spark plug wires on wrong?
For an effective engine start, the spark plug wires should be installed onto the right spark plug. If you connect them the wrong way, it affects the engine’s performance. And the engine may not start or may give a rough start.
Some other aftereffects would be engine missing, engine knocking, startling, and engine hesitation. So always double-check to put the wires the right way. For the correct fitting, the wires are labeled or coded.
Why do spark plug wires have high resistance?
Spark plug wires have high resistance to reduce radio frequency interference. Low resistance spark plug wires generate high-frequency interference because of the high voltage going through the wires.
The high voltage wires make electromagnetic waves around the wire which interfere with the surrounding wires and radio signals. That’s why you hear annoying sounds when you’re receiving a phone call in a car with the radio on.
Not in that case only, but this interference affects other sensors and computerized systems as well in vehicles. High resistive wires deliver high voltage to the sparks too. That’s why spark plug wires have high resistance.
What are the symptoms of a bad spark plug wire?
Spark plug wires are the essential component of the ignition system. They send high voltage to the spark plugs which in turn produce a spark to start the engine. So you should notice the quality of an ignition wire and avoid a bad wire. The question arises, what are the symptoms of a bad spark plug wire? Listen up.
Bad spark plug wires misfire an engine. They don’t deliver the voltage to produce the spark at the right intervals, hence incomplete combustion. This results in an engine misfire. If the engine light flashes in your dashboard screen, it also indicates low-quality wires.
Following are other symptoms of bad spark plug wires:
- Engine Hesitation
- Decrease in fuel economy
- Engine surging
- Engine Idles roughly
Final Thoughts
Narrowing down this article, you’ve seen some top products for your Harley Davidson. After checking the fitment model, you can choose any wire set for your motorcycle. It should match your bike model so that it transfers maximum voltage to the spark plugs for firing.
If you want the top product on the list, the ACCEL spark plug wires deliver the performance you need. It features rust-free terminals and highly protective insulators. The wires are also thick enough to give you maximum resistance. So go for the ACCEL brand if you want the best spark plug wires for Harley Davidson.
For a full list of our Harley Products and Reviews >> Check These Out <<
