Holley 4bbl secondary diaphram springs Ford Truck Enthusiasts Forums
Holley Vacuum Secondary Spring Chart. Web to increase the secondary opening speed install a lighter spring. Web holley equips all vacuum secondary carburetors from the factory with the heaviest (black) spring, which opens.
Web to increase the secondary opening speed install a lighter spring. Web holley equips all vacuum secondary carburetors from the factory with the heaviest (black) spring, which opens.
Web to increase the secondary opening speed install a lighter spring. Web to increase the secondary opening speed install a lighter spring. Web holley equips all vacuum secondary carburetors from the factory with the heaviest (black) spring, which opens.
