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.

spark plug gap

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Old 10-11-2007, 09:18 PM
  #1  
white93pony
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Default spark plug gap

what plug gap are you guys running with a 100 shot. im changing plugs and the old ones were set at .040 but i was told that .035 is what they should be set at. any info is appreciated
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Old 10-11-2007, 09:59 PM
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AdderMk2
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Default RE: spark plug gap

.035 is really small. stock gap is .054

id stay around .040-.045
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Old 10-11-2007, 10:10 PM
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mjr46
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Default RE: spark plug gap

I have mine set to .044 but then again I'm carbed and I don't take any chances even though I'm running a wet kit I ran 105 octane to insure no detonation would occur and I have a total advance curve between 34 to 36 degrees on my msd dizzy!!! I was lazy the first time out and didn't even bother backing the timing off...however amazingly enough the car ran well with no detonation and or leaning outor fuel starvation with fuel pressure set at 5.5 psi
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