The higher voltage the arc is, the bigger the spark in the cylinder which equals more power, more complete fuel burn, and less chance of fouling a plug (as long as the plug is the correct hear range) So if your have gotten rid of your points and upgraded to a … 239 cubic inch 1954: Champion H-18Y Spark Plug Gap: .035 in. Valve Clearance Comments; 501,601,701 (Gas & LP).025.027 1962 – 1963: Auto-Lite BF92 The gap on a spark plug is the distance between the electrodes. The force should be applied ONLY on the spark  plug ground electrode strap moving it closer or further away from the spark plug center electrode. ford spark plug gap chart 3.9 V8 2005 Tbird - Ford 2005 Thunderbird question I'm about to replace my spark plugs and coils. The proper gap ensures that the fuel will ignite each time. Ford Mustangs raise that level just a … You simply need to keep making adjustments until the key fits snugly. Price: Alternate: No parts for vehicles in selected markets. The "-T" indicate LGS style spark plug with a Tighter gap than standard LGS style spark plug and should be used on applications where the recommended gap setting is less than .032"., Brisk Extra Turbo Spark Plugs and some others. In most cases, you will find that you can use the plug without gapping it. This is generally desired in applications with late model high output ignition coils and lower compression naturally aspirated engine applications where cylinder pressures are relatively low and easy for spark discharge to occur. Intentionally blank: Intentionally blank: Related Parts. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. That means that there is higher voltage build up in the ignition system (ignition coil, distributor, ignition wires) prior to the spark discharge. Good Luck. It owes to the specs manufactured at present. when you widen the gap, it gives you a bigger spark which gives a more complete burn, better mileage, less emissions and more power up to the point where the ignition source reaches its limit. Vapor Canister Purge Valve / Solenoid. More pressure is required form the leaky hose, because more water leaks out at other places than the hose end. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more! Part numbering for Brisk, NGK and Denso spark plugs is reasonably logical with the trailing digits transposing directly into size in mm. 1960 – 1961: Champion F-14Y I know that other brands of plug are in the .030 range (give or take), and so i'm double checking with you guys regarding the .051 gap that the Motorcraft SP-537 plugs come set at. On a conventional spark plug, it is the area between the center and the ground electrode. Spark Plug Gap: .035 in. I've googled it and found .052-.056" for gap and 9-15 lb/ft for torque, but want to confirm those numbers before starting the work. (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), RS14YC6), Spark Plug Gap - understanding the basics. 2) Pressure in the combustion chamber at time of spark discharge - Depends on compression and aspiration of the engine. The average gap is 0.035 and 0.045 thousandths of an inch. // 2008 > TAURUS X > 3.5L V6 > Ignition > Spark Plug. Keith Thank you. 1999 Ford F-150. 1960 -1961: Champion 860 This operation requires enough experience. For the best engine and spark plug performance,  the size, style and shape of the spark plug gap should correspond with many factors. However, when dealing with a modified engine, you should adjust the NGK iridium spark plugs as needed. RC10YC4) 5 = 1.3mm (e.g. It is used to measure the length of the gap between the ground and central electrodes. // ]]> 170 cubic inch (inline six-cylinder) google_ad_client = "pub-3766400037069822"; /* Spark Plugs A (728x90) */ google_ad_slot = "2371573275"; google_ad_width = 728; google_ad_height = 90; This is calculated as a % of misfire. The service manual says use .054, but refers to an extinct plug … RN16YC5) 6 = 1.5mm (e.g. // ]]> Copyright © 2020 FORD CLASSICS — Activation WordPress theme by. I'm going to change the plugs on my 2012 with 97500 on the clock, and need the plug gap and torque info. Ford F-150 2018 5.0L V8 spark plug gap. 223 cubic inch (inline six-cylinder) High RPM applications also shorten the ignition coil saturation (on time or DWEL) resulting in less available energy. Spark Plug Gap: .035 in. The exception are for example spark plug part numbers with gap that does not need to be adjusted and can not be changed, such as Brisk Premium Multi-spark plugs, Brisk Premium LGS Spark Plugs, Brisk Premium LGS-T spark plugs, Brisk Extra Turbo Spark Plugs and some others. For Champion spark plugs it is a little less logical and is as listed below: 4 = 1.0mm (e.g. The very most important rule when checking or adjusting spark plug gap is, to never pry, apply or exert any force on the spark plug center electrode, or center electrode ceramic insulator. Come join the discussion about performance, modifications, horsepower, tuning, build specifications, and more! This robs available voltage at the spark plug gap,  as it "leaks" through the low resistance carbon deposits to the ground, resulting in a weak spark. Ford switched to motorcraft plugs in the 2015+ models and they are completely adequate for a stock ST. Also, the 0.040 gap on the NGK is generic. If there are trailing numbers after the part number, then the gap should be specifically set as per the manufacturer's part code designation (e.g. THIS CROSS REFERENCE TABLE IS INFORMATIVE ONLY. Spark Plug Gap: .035 in. Modern engines often turn the check engine light on with a misfire code (generally P03xx) with corresponding cylinder number when only as little as 10% misfire occurs, which is far before anyone will even feel that something is wrong or even think that a misfire is occuring. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. [CDATA[ A forum community dedicated to Ford Mustang owners and enthusiasts. Sometimes customers wonder, why there is so many different spark plug gap firing configurations. Which spark plug gap should I use. Higher fuel concentration has the same effect (lower A/F ratio). If every cylinder generates exactly the same amount of power, than the time between each pulse is in the same pattern. May 17, 2015. The reason is, that in order to get the best possible performance, the spark plugs have to be carefully matched with the appropriate application and intended use. After the coil pack quality problems were sorted (many Years ago) the prescribed spark plug gap was changed to 1.2 mm. The spark plug gap for a 1998 Ford Explorer (V6 and V8 engines) is .054" Where is the 4X4 fuse located at in 2002 Ford Explorer? Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); After driving several miles and subsequent assessment of the insulator tip appearance it is possible to decide about the most suitable equipment. 1999 Ford F-150 / Whats the spark plug gap ; WHATS THE SPARK PLUG GAP . 6) Type of Ignition system - magneto, CD (Capacitor Discharge), or Inductive. The proper spark plug gap for a 2001 Ford F150 4.6 V8 is .054" Where are the coils located on a ford F150 5.4 liter engine? 5) Engine load and intended use - when engine is under load, the pressures in the combustion chamber is higher as there is more air aspirated, making it harder for spark to occur. Ford never changed the prescribed spark plug gap for this type of engine. If your spark plug part number has no trailing digits then (for most part numbers) it will be preset to this specification. 240 cubic inch (inline six-cylinder) Higher cylinder pressure requires higher voltage for the spark to occur. Asked by LONESTAR67 in Winnemucca, NV on . Spark Plug Wire Retainer / Clip. If tuned, the gap should be 0.026. You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. google_ad_client = "pub-3766400037069822"; /* Spark Plugs C (468x60) */ google_ad_slot = "9170633604"; google_ad_width = 468; google_ad_height = 60; Used spark plugs are hard to fire as the gaps are worn out, and insulation properties of the ceramic is compromised by solid combustion deposits and old fuel saturation. In this way, you can tell if the 49cc spark plug gap will work for the plug you have in mind. CD ignitions have very fast Voltage rise (short rise time) and therefore they also work very well with spark plugs that have high capacitance, such a spark plugs with multiple gaps and/or surface discharge spark plugs. The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. The like to be "experts" often say that there is no difference in spark plugs, and that the mixture either gets ignited or not. ... 460 Ford Forum. Spark Plug Gap: .035 in. spark plug. I have documented dyno sheet where we lowered a spark plug gap from .045 to .032 and picked up 35 hp. 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