Holley Carb Vacuum Diagram
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Holley carb vacuum diagram. Full size view holley parts page diagram. Vacuum secondary tuning. The information in this manual covers carburetor models 0 80457sa 0 80458sa 0 1850c and 0 1850sa. For most pictures the 0 80457sa carburetor equipped with electric choke is shown in the illustrations in this manual.
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Holley offers a wide variety of replacement and performance enhancing components for your carburetor. The 0 1850c carburetor is a 50 state emission legal replacement carburetors for 1965 69 v 8 applications. For example the number 65 indicates that the valve will open when engine vacuum drops to in. Holley s products also include performance fuel pumps intake manifolds engine dress up products for street performance race and marine applications.
We ve added holley s 2x4 quick change housing kit that includes small nipples on each lid that connect a. Hg 85 indicates in. 111 primary metering body filler 112 vacuum tube plug 113 idle limiter cap 114 idle adjustment needle 115 idle adjustment needle seal 116 spark hole plu g 117 metering body vent baffle 118 primary metering jet 119 tube o ring assembly 120 primary metering body gasket 121 primary power valve assembly 122 primary power valve gasket. Each holley power valve is stamped with a number to indicate its vacuum opening point.
Then invert the bowl and adjust the float level by turning the adjustment nut until the float is level. From replacement fuel bowls to power valves and jets and everything thing in between. In fact it is not at all complex but it can be time consuming. As mentioned earlier by selecting the correct spring for the vacuum chamber you take care of 90 percent of the tuning of the secondaries.
This tunnel ram is set up with a pair of 0 1850 600 cfm holley vacuum secondary carbs.