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New spark plugs and recalibration ? New spark plugs and recalibration ?
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Old 08-15-2011, 07:28 pm   #1
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Question New spark plugs and recalibration ?
I understand GM upgraded the calibration for the .40 gapped plugs
Just what did they do ?
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Old 08-15-2011, 08:56 pm   #2
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Quote:
Originally Posted by vettex2 View Post
I understand GM upgraded the calibration for the .40 gapped plugs
Just what did they do ?


Paul will know for sure, but I am guessing that it has to do with spark timing values/mapping tables.
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Old 08-16-2011, 06:01 am   #3
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HI there,

Yes, as well as slightly different fuel tables due to revised flame front changes.

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Old 08-16-2011, 07:01 pm   #4
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what years ? all c5's ?
and just wondering why ?
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Old 08-17-2011, 12:05 am   #5
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I would like to know also, I am going to do plugs/wires as a maint. but I don't want a dealer to mess with my tune, car is a beast. What plugs/gap if you like it the way it is?

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Old 08-17-2011, 06:15 am   #6
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OEM PLUGS, leave the gap alone. The calibration simply OPTIMIZES the usage of the plugs.

41-110 is the ACDelco number

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Old 08-17-2011, 02:06 pm   #7
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Quote:
Originally Posted by c4c5specialist View Post
OEM PLUGS, leave the gap alone. The calibration simply OPTIMIZES the usage of the plugs.

41-110 is the ACDelco number

Allthebest, c4c5
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Old 08-20-2011, 10:28 am   #8
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Quote:
Originally Posted by c4c5specialist View Post
OEM PLUGS, leave the gap alone. The calibration simply OPTIMIZES the usage of the plugs.

41-110 is the ACDelco number

Allthebest, c4c5
For all year C5's Paul, or am I confusing myself? :)
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Old 08-21-2011, 04:42 am   #9
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HI there,

Yes, this applies to ALL years.

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