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 question need help asap

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Old 05-19-2007, 02:39 PM
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89Ford
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Default Spark Plug question need help asap

Whats the stock spark plug gap for an 89 mustang? and would it be better to use a different size gap if it has a vortec s/c, what size gap?
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Old 05-19-2007, 03:27 PM
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Default RE: Spark Plug question need help asap

anyone?
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Old 05-19-2007, 05:21 PM
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CarJway
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Default RE: Spark Plug question need help asap

Stock gap is aorund .054

If your running a blower, you might want to step down the heat range, and also close that gap depending on how much boost your running. i.e. to avoid spark blow out. Any type of ignition mods?

FYI, I ran 2 steps colder plugs with 125 shot and a .045 gap. No problems with that... (MSD 6AL box)
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Old 05-19-2007, 06:20 PM
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sc94gt
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Default RE: Spark Plug question need help asap

I run one plug colder (Autolite 24's) with a gap of .035... works perfect.
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