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Bob Bidonde · 08-20-2017, 07:21 AM

I am running a 5.5:1 head, a 12V Bosch hi-voltage coil, Motorcraft TT10 plugs with an 0.027" gap. I iterated the plug gap and spark advance adjustments, to find by the seat of my pants the best engine performance.

08-20-2017, 07:21 AM	#5
Bob Bidonde Senior Member Join Date: May 2010 Location: Long Island, NY Posts: 3,472	Re: 5.9 head points adjustment I am running a 5.5:1 head, a 12V Bosch hi-voltage coil, Motorcraft TT10 plugs with an 0.027" gap. I iterated the plug gap and spark advance adjustments, to find by the seat of my pants the best engine performance. __________________ Bob Bidonde