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KevinH
Site Admin
Joined: 22 Nov 2007
Posts: 90
Location: Ohio
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 Posted: Tue Jun 24, 2008 6:39 pm Post subject: June "Spark Plugs" |
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Spark Plug Blueprinting for Optimum Performance
Things you will need:
Spark plug gaper
Small thin File
Spark plug
The main focus of effort is going to be applied to the side electrode or ground electrode which is made from high nickel steel and is welded to the side of the metal case. The side electrode runs very hot, especially on projected nose plugs. It is a known scientific fact that spark passes more rapidly and at a cleaner rate when it connects to two distinctive points rather than a round or uneven surface. So basically, what we are going to accomplish is creating those point areas on a standard stock spark plug...
Step 1: The first step is we want to open the spark plug so we can get to the areas that we will be filing on. To do this insert the plug gaper (or you can use a putty knife) and slowly bend the electrode back opening the gap as seen in this picture.
Step 2: The very next thing you are going to do is start gently filing the electrode basically into the shape of a square box. You want to file the underneath, both sides and the top until a square rectangular box is formed as illustrated in these photos.
Step 3: After completing the filing of the electrode you will now want to file over the top of the center electrode. You wan to barley go over the top, just a few times with little pressure, you do not want to shorten it just take the roundedness out of it so the spark will jump around the entire outside edge.
Step 4: The last and final step is to reset the gap on the spark plug. You will again do this with the use of you plug gaper (or most often I use feeler gauges, which I feel is a more accurate reading). Keep in mind the gap adjustment can be fairly critical, and if it is maladjusted the engine may run badly, or not at all. A narrow gap may give too small and weak a spark to effectively ignite the fuel-air mixture, while a gap that is too wide might prevent a spark from firing at all. Either way, a spark which only intermittently fails to ignite the fuel-air mixture may not be noticeable directly, but will show up as a reduction in the engine's power and fuel efficiency. I normally set the gap between .28 (for short tracks) and .32 for tracks with a bit longer straight away. Experiment around and see what works best for you.
I hope this helps you with your racing and remember. “It All Starts with a Winning Attitude”
Kevin
www.crpracing.com |
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DEJONG
Joined: 26 Jun 2008
Posts: 5
Location: Iowa
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| Posted: Thu Jun 26, 2008 2:38 am Post subject: Which make of spark plug? |
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Which make of spark plug should a guy be using? Are ones any better than the other and/or for different types of tracks?
NGK BPM7A
NGK Iridium
Champion
E3 |
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jdkotara
Joined: 02 Dec 2007
Posts: 25
Location: Ft. Myers Florida
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| Posted: Mon Jun 30, 2008 11:36 pm Post subject: |
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| We strickly use a ngk bpm7or 8 also I believe that the iridium plug reach is a little longer and therefore could be a problem with tech . |
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DEJONG
Joined: 26 Jun 2008
Posts: 5
Location: Iowa
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| Posted: Fri Jul 18, 2008 3:02 am Post subject: |
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| For a dirt track, wide open throttle, 10,500 or so for RPM, would you set gap at .32 still? |
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