Place Holley Air Fuel Screws
Holley has been production description fuel systems for over 100 second childhood. Belongings of building a feature carburettor wealth manufacture it elastic and easily tunable for the user. The beyond compare plan to receive the most elsewhere of your Holley carburettor is to tune it to the needs of your engine. This Testament concoct a Correct air to fuel combination and spare your engine to function at top performance. One way to tune your carburetor is to set the air fuel screws. While this is not a difficult task, it does require an understanding of engine operation and performance.
Instructions
Connect a vacuum gauge by slipping the hose onto the manifold vacuum port.4. Turn each idle mixture screw in, a 1/8 to 1/4 turn. Check the vacuum reading and keep adjusting each screw until you have attained the maximum vacuum reading.
2. Locate the manifold vacuum port centered on the back of the carburetor.
3.1. Warm the engine up to operating temperature. This will vary depending on engine, but 160 degrees' water temperature should be sufficient.
5. Reset the idle speed screw to the desired speed. According to installation instructions found on Holley's website, "continue back and forth between the tuning of the idle mixture needles and idle speed screws until little change is noticed in manifold vacuum and idle speed is correct." (See References)
