Thread: Holley vacuum secondaries
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Old 12-29-2004, 08:37 AM
newBDR newBDR is offline
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Join Date: May 2004
Location: Chester Springs, pa
Cobra Make, Engine: Backdraft 302
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Default Holley vacuum secondaries
Anyone play with different springs in their vacuum pod? Any noticable change to report? I have a 670 Street Avenger on my 302 and was toying with the idea of getting their spring kit to see if it makes any difference I can feel - opening the secondaries a little sooner or later. According to Holley, a lighter car can benefit from opening them sooner for a bit better performance.
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