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Spark plug correct gapping

jayroca

jayroca

Banned
Ok guys picked up some fresh Autolites 104's to get my motor running and want to know what is the proper gapping for these plugs mods are as follows if that helps:

XP Cam
Stage 3 P&P Heads
130# Springs
SD Headers
3.2 pulley



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I run my 103's at 35 because it was showing I was getting blowout on the dyno. I would say start around 40 to 45 and then you can tighten it up if you start to get blowout.
 
Aren't 103's to cold? Dsmuts I'm leaning to .055 but I'ma do 40 as well

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104's is what I'd run. I'm running 104's @ .055 right now. I have about 15k on them right now
 


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