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 reach

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Old 02-22-2013, 11:41 PM
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stangrookie302
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Default spark plug reach

So, I wana replace my sparks but what "spark plug reach" should I have for a lightly modified 302 5.0L? Stock heads, just have CAI and flows. I can't seem to find it on Google. Should they be .691, .460 or .708. ?
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Old 02-23-2013, 06:13 AM
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adrnlnjnky700
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get the Autolite 25 plug gapped at .053. until you add something like new heads, or forced induction the AL 25 plug works great and is inexpensive. it has a .460 reach

Last edited by adrnlnjnky700; 02-23-2013 at 06:17 AM.
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