Product Troubleshooting for 2007 Confederate F131 Hellcat
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Manufacturer Spark Plug Gap
A spark plug part number might fit hundreds of engines and although the factory will typically set a gap to a pre-selected setting this gap may not be optimum for your particular engine and may not take into account modifications that you may have made to the engine.
Spark Plug Gap – Bigger is Better
The larger the spark kernel that is generated by a spark jumping the electrode gap, the more likely and complete the fuel burn will be, and the smoother the engine will run. That is, the larger the spark gap that’s exposed to the air/fuel mixture, the easier it is to initiate combustion. This translates directly into improved throttle response.
So, the larger the plug gap you can run (without misfires) the better.
Unfortunately, the greater the plug gap, the higher the voltage requirement to jump the gap. The difficulty lies in that, any added gap creates more strain on the other ignition parts. Coils, for example, may not have enough stored energy to cross the gap, creating a misfire. Old plug wire insulation can break down at the higher voltages required to fire a larger gap.
The stock Ducati coils are good enough to fire a 0.044-inch plug gap. Any gap larger than this will likely result in more misfires (there’s always a few) and subsequent power loss. The correct new plug gap is specified at about 0.024-inch (0.6mm). But, remember, as a plug wears, the gap opens up further.
If you use conventional sparkplugs, start with the recommended gap and try opening the gap up in 0.002-inch increments. You should note a progressively smoother throttle response if not more power. When the bike begins to lose power, go back 0.001 - 0.002 inch and this will be your optimum gap.
I don't know offhand what the DCPR8E plug comes pre-gapped at but as a good rule-of-thumb, if you go more than 0.008 inch over the out-of-the-box gap you won’t maintain parallel surfaces between ground and the center electrodes. So if you reach that point, change to a plug that starts at a larger gap. The NGK dash 9 series starts at a 0.9mm (0.035-inch) gap, and is used for that reason.
If you run iridium or platinum electrode plugs, start with the 0.035-inch gap that they are shipped with. Don't run them at smaller gaps or you'll loose throttle response.
If you have a older bike, you may arc over the plug wires before you can reach the optimum plug gap. If the spark plug wires have inadequate insulation, the wire cannot maintain a high enough voltage across the insulation and will arc to ground before firing the plug gap. The factory spark plug leads are stranded wire covered with an EPDM jacket and although the wire itself will last a long time, the jacket will start to break down after a couple of years which is why most good aftermarket wire is insulated with silicone rubber.
If this is the case, replace the stock spark plug wires with a set of Magnecor or similar quality wires. This will allow running a larger plug gap without a concern for insulating the higher voltage needed to jump the gap. Ducati 916 Magnecor #2549 wires, for example, run $67.
Running a larger gap is the main benefit of installing an ignition amplifier, such as the one sold by Evoluzione for Ducati's.
The Evoluzione ignition amplifier increases the primary voltage to the stock Ducati coil from the existing battery voltage to either 16 volt or 18 volt (user selectable). A higher primary voltage means you get a higher secondary voltage applied to the wires and plugs. The higher the secondary voltage - the larger gap it will jump across. Evoluzione recommends that for best throttle response, you run a 0.060 inch plug gap.
One reservation that I have about ignition amplifiers as a group is that they could possibly cause overheating and eventual failure of the stock coils or wires. This reliability consideration has to be balanced against improved performance. An independent test by Road Racing World magazine on a GSXR 1000 saw only about a 0.2 HP improvement, but throttle response is the major benefit.,,,
Research, Knowledge and Information :
How to Gap a Spark Plug: 8 Steps (with Pictures) - wikiHow
Sep 08, 2016 · How to Gap a Spark Plug. A properly gapped spark plug is necessary for a properly functioning engine. The gap size affects the spark plug's firing ...
Read More At : www.wikihow.com...
Spark plug - Wikipedia
A spark plug (sometimes, ... A spark plug gap gauge is a disc with a sloping edge, or with round wires of precise diameters, and is used to measure the gap.
Read More At : en.wikipedia.org...
Why the Gap on a Spark Plug Is So Critical | It Still Runs
The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. All internal combustion engines have a spark plug, or in the case of diesel ...
Read More At : itstillruns.com...
How important is it to maintain the proper Spark Plug gap ...
How important is it to maintain the proper Spark Plug gap distance between electrodes?
Read More At : www.ntbp.com...
How to Gap a Spark Plug: 3 Steps - Instructables.com
In this instructable you will learn how to properly set the gap on a Spark Plug for your vehicles Ignition System. You will need: 1) Spark Plugs 2) Spark Plug Gap ...
Read More At : www.instructables.com...
Spark Plug Gap - NGK Spark Plugs - Tech Video - YouTube
May 25, 2009 · Correct way to check, set and adjust your spark plug gap. NGK Spark Plugs USA.
Spark Plugs Technical Information Electrode Gap ... - Adobe
• To close the electrode gap, carefully tap the plug, electrode first, on a hard surface, as shown in illustration 2. Spark Plug Gapping
Read More At : s7d9.scene7.com...
Gap | Definition of Gap by Merriam-Webster
The gap between the lead runner and the rest of the field continued to widen. The sheep got through a gap in the fence. ... (a spark plug) intransitive verb: ...
Read More At : www.merriam-webster.com...
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