Thread: Vacuum secondaries spring
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Old 04-17-2020, 06:56 PM
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FredG FredG is offline
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Location: Howell, NJ
Cobra Make, Engine: Backdraft Car #1209 Roush 427R
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The adjustable was going to be my next option after I see how much of a change the spring made. What did you use as the determining point for the opening. Best info I could find was right before the engine bogged when you punch it.

Fred
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