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CHOKE CONVERSION KIT

CHOKE CONVERSION KIT

$53.50
$53.50
Sale Sold out

The Choke Conversion Kit is a universal retrofit assembly that converts manual-choke carburetors to automatic electric-choke operation, simplifying cold starts on muscle cars, street rods, and vintage trucks. It is compatible with most Holley, Edelbrock, Rochester, and Carter two-barrel and four-barrel carburetors that feature a manual choke housing. The kit is ideal for restomod builds where daily drivability and cold-start convenience are desired without sacrificing under-hood aesthetics.

The kit includes an electric choke thermostat housing, a bi-metallic spring assembly, a stainless steel choke plate, and wiring harness with an insulated spade connector. The thermostat is pre-calibrated for optimal pull-off timing and requires a 12V ignition-switched power source. Installation is completely mechanical—the housing bolts directly to the carburetor choke horn using the existing screw pattern, and the spring indexes to the existing choke linkage with no drilling or modification.

An automatic choke eliminates the need to manually set the choke plate before every cold start and feather the throttle to keep the engine running. The electric thermostat gradually opens the choke as the engine warms, providing a faster, more consistent idle during warm-up. This reduces cold-start emissions, improves fuel atomization when the engine is cold, and delivers reliable start-up behavior across a wide range of ambient temperatures.

Simplify your cold starts. Order the Choke Conversion Kit with free shipping on qualifying orders over $425. Shop Atech Motorsports today.
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Frequently Asked Questions

Can the Atech choke kit replace both electric and manual chokes on my carburetor?

The Atech choke kit is designed to replace either electric or manual choke mechanisms on compatible carburetors. It includes the choke thermostat, housing, and linkage components for a complete conversion. The Atech kit allows you to upgrade from a manual choke to automatic operation or replace a failed electric choke assembly. Verify that the Atech kit matches your carburetor make and model before ordering for proper fitment.

How do I adjust the Atech choke kit for proper cold-start operation?

Adjusting the Atech choke kit involves setting the thermostat tension so the choke plate closes fully when the engine is cold and opens completely when warm. Rotate the choke housing to adjust the spring tension with richer settings typically requiring a one to two notch adjustment from the center position. The Atech choke should be set so the engine starts and runs smoothly without excessive loading or stalling during warm-up. Fine-tune the adjustment after the engine reaches operating temperature for optimal performance.

Does the Atech choke kit work with both two-barrel and four-barrel carburetors?

The Atech choke kit is available in versions designed for both two-barrel and four-barrel carburetors. The linkage length and thermostat housing orientation differ between the two Atech versions. The Atech kit includes the correct choke plate and linkage for your specific carburetor type. Ensure you select the Atech kit that matches your carburetor barrel count and model number. This ensures long-term reliability and performance from your purchase.

What maintenance does the Atech automatic choke require to keep it working reliably?

The Atech automatic choke requires minimal maintenance but the mechanism should be inspected annually for binding or sticking. Clean the choke plate and housing with carburetor cleaner if you notice any hesitation in operation. The Atech choke thermostat spring should move freely through its full range of motion when the engine is cold. Apply a drop of light oil to the pivot points of the Atech choke linkage if they appear dry or sticky.

Will the Atech choke kit improve cold starts on my carbureted engine in winter?

Yes, the Atech choke kit provides reliable cold start enrichment that helps your carbureted engine start and run smoothly in cold weather. The thermostat spring closes the choke plate when cold and gradually opens it as the engine warms up. The Atech kit provides the correct air-fuel enrichment for starting in temperatures as low as 0 degrees Fahrenheit. A properly adjusted Atech choke eliminates the need for pumping the gas pedal multiple times before starting.