5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Plug gap

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Old Mar 29, 2004 | 03:27 AM
  #1  
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Default Plug gap

Whats a good median size to gap my plugs at. Manual says .054 but that sounds a little big... what do you guys run?
Old Mar 29, 2004 | 05:47 PM
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Default RE: Plug gap

what igniton do you have?...I'd stay with 54 unless nitrous or boost is used
Old Mar 29, 2004 | 06:31 PM
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Default RE: Plug gap

Right now its stock, as soon as I learn how Ill be putting in Crane Fireball HI-6 module and matching coil with new Taylor wires, autolite plugs. With that should I make the gap smaller?
Old Mar 29, 2004 | 06:46 PM
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might want to try 50 til you put in the other stuff
Old Mar 29, 2004 | 08:00 PM
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Default RE: Plug gap

What exactly does the gap distance mean. It seems common sense that the longer it has to reach the bigger the spark is, is that wrong?
Old Mar 29, 2004 | 09:36 PM
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Default RE: Plug gap

but if you dont have a strong enough spark it wont conduct across a large gap, why your car was not accelerating over 3900 rpm...
Old Mar 29, 2004 | 09:49 PM
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ok, that makes sense, so the larger the gap the better basically right?
Old Mar 30, 2004 | 02:24 AM
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Default RE: Plug gap

keep the stock setting aroudn 52 or 54 but if you spray it or boost it drop down to around 32 or 35 so the added shti dont blow out he spark
Old Mar 30, 2004 | 06:14 PM
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50 mean 50,oooth of a gap wider the gap more current area for fuel to iginite...
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