Thread: Vacuum secondaries spring
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Old 04-17-2020, 10:04 PM
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FredG FredG is offline
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Join Date: Sep 2018
Location: Howell, NJ
Cobra Make, Engine: Backdraft Car #1209 Roush 427R
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Based upon all I have experienced with the different spring rates on the vacuum secondaries, I am guessing there are a lot of owners out there with carbureted cars and vacuum secondaries that have yet to experience the true violent acceleration these cars can produce. The new carb with the heavier spring brought a tameness to the car. The older one with the lighter spring brought the acceleration to a get your attention and you better be careful level.

Fred

Fred
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