02-08-2017, 05:05 PM
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CC Member
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Join Date: Jul 2009
Location: Westerly,
RI
Cobra Make, Engine: Fordstroker 408w custom solid roller-Craft ported Brodix 17*heads-CFM ported Vic Jr. intake-1 3/4 primaries- 575hp-TKO-600RR Liberty upgrade- -Moser 8.8 trutrac-McLeod Street Extreme--QA-1-Wilwood brakes, Classic Chambered 3" Cobrapacks, Avon's
Posts: 645
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Not Ranked
When you bring the initial timing down to 15* the idle is dropping and your vacuum falls. Adjust the idle back to 1000 clean it up with the idle mixture screws and see what your vacuum is. I'll bet it's back to 16.5
Optimum timing is based on the characteristics of the engine. Dyno it and find out
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Lou
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