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  4. Holley 2210, 2211, 2245 Technical
Main Jets
The 2 main jets in the carburetor are usually different sizes. The larger numbered jet goes on the accelerator pump side of the carburetor.

Power Piston

At idle and low speeds, the power piston is held in by vacuum. as the vehicle speeds up, vacuum drops, which allows the spring loaded piston to move down into the float bowl pushing the power valve open and allowing more fuel to flow. The only thing that moves the power valve piston is vacuum, so the piston needs to be very free. You can try using carburetor spray cleaner, or as we do Silicon spray lubricant. Spray the piston area as you move the piston up and down, or twist it one way, then the other. Using your finger push down on the spring end, then remove your finger so that the rod snaps up. Doing this repeatedly will make the assembly pop out of the top. When reinstalling the piston, lightly stake the side so that it stays in the cylinder. See our Holley 2210 parts catalog.

The 2245 2 barrel carburetor was used on the 1974 Chrysler products with a 360, or 400 engine.

Four fuel systems, or circuits are used on the 2245.
Idle Circuit - provides air/fuel mixture at idle and low speeds.
Accelerator Pump Circuit - provides additional fuel when accelerating.
Main Circuit - provides fuel for normal cruising.
Enrichment Circuit - provides fuel for high power.
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