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Old 04-01-2012, 07:18 PM   #192
Brabs_Weather
Focus Enthusiast
 
Join Date: Jan 2012
Fan#: 93741
Location: Chesapeake, VA
What I Drive: 04 Ex Ltd, 08 Edge Ltd, 12 FF Ti

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Quote:
Originally Posted by AZfocus2012 View Post
Do these numbers work for the 2012? I might have to give this a try. I can re-gap the plugs every couple of years. Used to have to do that or replace them every few years, back in the day.
In the owners manual it says the spark plug gap is:

2012 .035 c/r 12:1
2011 .051 c/r 10:1
2010 .051 c/r 10:1

Spark plug gap is determined by your ignition and compression ratio. As the Focus C/R has gone up the gap has gotten smaller. The higher the compression ration the harder the ignition works to spark. On the performance mods that some have done .08 (~.043) would be the largest over gap that would provide the best performance. You still have several variables like fuel type, octane and even brand of fuel.

New to the FF but the same principle on every car I have owned.

1964 Chevy II Nova
1980 Chevy Monza Spyder
1990 Dodge Colt
1993 Nissan Altima
1995 Acura Integra GSR
1997 Mercury Mountaineer
2000 Toyota Solara
2004 Toyota Solara

Current
2004 Ford Explorer
2008 Ford Edge
2012 Ford Focus
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