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Old 04-19-2009, 12:35 AM   #1
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what is global spark?

i was adjusting some stuff and accidently selected global spark. with my headache from the cold i'm kicking i have brain farts now and then so i hit select again thinking i wold take me back but it changed it to -14. my car ran like poop so i put it to 0. what is global spark adjusting, what's a good place to set it at, in what way is it different from spark 0-2000, 2000-4000, 4000-8000?


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Old 04-19-2009, 01:54 AM   #2
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global makes a change to all rpm ranges

0 means you are going to use what is in the tune

any adjustments are from the values in your tune
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Old 04-19-2009, 09:26 AM   #3
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makes sense!
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Old 04-19-2009, 05:32 PM   #4
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Keep in mind that global spark is what I call a hard set , meaning reguardless of what info changes the base timing the +/- you have in global is there reguardless , from crank timing to 10,000 RPM , much like locking the weights and setting the timing in the old dist engines

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Old 04-19-2009, 10:10 PM   #5
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so what's the relationship between the global spark and the spark 0-2000,2000-4000,4000-8000, how do they affect each other? like if i set the global at -1 does that bump the 0-2000,2000-4000,4000-8000 down 1 from were there set or does it set them all to -1? or does it do something different then that?
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Old 04-19-2009, 10:13 PM   #6
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-1 in global would be -1 at every point of timing reguardless of RPM , ECT , IAT LOAD ETC

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Old 04-19-2009, 10:20 PM   #7
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if you do -1 global and +1 to all the increments, you end up at 0 (the tune's timing values)
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Old 04-19-2009, 10:20 PM   #8
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so if i had 2000-4000 set at -3 would -1 in global make the 2000-4000 -2 or -1? i really appreciate your expertise!
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Old 04-19-2009, 10:21 PM   #9
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-2... its just arithmetic.
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Old 04-19-2009, 11:26 PM   #10
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Kind of but not really , With changing global it does not look at things like ECT , IAT , TPS , AF etc it give you a -1 AFTER all calculations are done

By changing the 2-4000 -1 these timing changes are done before all other calculations

Or thats my understanding anyway

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