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2. Carburetor General Questions - Holley Performance Products Forums

   forums.holley.com/forum/carburetors-pumps/carburetor...

   To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...

3. Setup recipe for a 390 cfm on a small engine? - Holley...

   forums.holley.com/forum/carburetors-pumps/street...

   Holley rates their carburetors for cfm versus manifold depression, 1.5 inches for 4 barrels, 3 inches for 2 barrels. So a 390 4 barrel needs to reach 1.5 inches of manifold vacuum before the carb is flowing 390 cfm. You leave power on the table if the carb produces restriction like that. A 390 4 barrel is initially smaller than a 300 2 barrel ...

4. Flooding Problem - Holley Performance Products Forums

   forums.holley.com/forum/carburetors-pumps/carburetor...

   Flooding Problem. 05-13-2024, 09:34 PM. My small block Chevy engine is flooding. I have a Holley carburetor. Neither the primary nor secondary float bowels are over filled, I checked by removing the level screws on both. I pulled two spark plugs and both were wet.

5. Home - Holley Performance Products Forums

   forums.holley.com

   02-02-2023, 12:00 AM. Holley Forum User Support. Questions for the moderators - This is for questions regarding user accounts, log in issues, how to use the forum, etc. Please post technical discussion regarding product in the user discussion spaces in the brand areas. Topics: 34 Posts: 135.

6. Street Carburetors - Holley Performance Products Forums

   forums.holley.com/forum/carburetors-pumps/street-carburetors

   To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...

7. Power Valve Questions - Holley Performance Products Forums

   forums.holley.com/forum/carburetors-pumps/carburetor...

   Change that out to 6.5 or 7.5. Holley's rule of thumb is to be about 1/2 of your idle vacuum for power valve size. I'll go through a checklist of things that could cause a lean condition. Check the fuel height in the bowls - adjust accordingly. Barely dripping out if site plug or if site glass 1/2-3/4 of the way up in the site glass.