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Old 07-28-2013, 09:56 AM   #1
Crime2
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Read My Plug

What do you think on the looks of this plug. About 6000 miles, 10psi.

Good? Bad? Replace them?

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Old 07-28-2013, 10:01 AM   #2
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a little rich, but good. you can replace, but remember these are suppose to be 100,000 mile plugs.
have you done any mods? that could change some of the reason it is running a little rich

Check this chart

http://www.4secondsflat.com/plug_chart.html
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Old 07-28-2013, 12:05 PM   #3
Crime2
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Quote:
Originally Posted by spyderbuddy View Post
a little rich, but good. you can replace, but remember these are suppose to be 100,000 mile plugs.
have you done any mods? that could change some of the reason it is running a little rich

Check this chart

http://www.4secondsflat.com/plug_chart.html
Thank you sir!!!

Lost of mods :-). Built top end, single front mount turbo etc etc.

It they look good not going to change them. Pulled all of them and they look almost identical.

Going for a full re Dyno tune so just wanted to make sure they were looking good before.


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Old 07-28-2013, 12:30 PM   #4
dekan513
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is that factory plugs , if so i would go a step colder with ur mods for sure.

cant really see that pic to well . look for ur timing mark. should be close to the bend of the strap.(timing mark is where it changes color) here is a good video

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Old 07-28-2013, 01:05 PM   #5
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he appears to be running rich to me, but hey I just started reading plugs!
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Old 07-28-2013, 01:15 PM   #6
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You really need to check down the electrode a bit further than your picture indicates.. And if you are looking for a WOT reading, you have to have the car hot, do a few gear pulls and at the top of the pulls before decel cut the car off. That's how we read all the high boos/big nitrous shot cars. Once you plateau the 20+ psi mark/250+ shot mark its all about reading the heat throughout cylinders. This is where EGT control comes into play and the wideband means less & less, but we don't need to go into this discussion here
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