Mailbag: How to Cure Spark Plug Fouling During Idle
Q: I own a 1971 Dodge Demon with a 400. The 10.5:1 compression engine has a forged crank and “LY” rods, and has a balanced bottom end. The heads are 906 castings […]
Ask Away! with Jeff Smith: Converting a Draw-Through Carburetor to Blow-Through
I have a 850 Mighty Demon carb marked BC 56. The carb is designed for use with a Roots or draw-thru supercharger. I want to use it for blow-through using a […]
Mailbag: How to Choose a Carburetor for Supercharged Engines
(image © superchevy.com) Q: I am getting ready to pull the trigger on a supercharger for my 1966 Chevelle. What should I do about my carburetor? Do I need to go […]
Mailbag: When and How to Change a Carburetor Accelerator Pump
Q: My Holley-equipped vehicle has a stumble from a dead stop. Someone told me the accelerator pump nozzle may need resized. How do I know if I need to change […]
Booster Basics: How Carburetor Booster Design Relates to Your Vehicle’s Performance
To truly understand how carburetors work, you first have to know Daniel Bernoulli. Bernoulli was an 18th century scientist who discovered that pressure is inversely proportional to velocity. This principle, […]
Carb Science: Two-Circuit vs. Three-Circuit Metering Systems for Race Applications
Before electronic fuel injection’s microprocessors and sensors revolutionized fuel delivery, carburetors fueled high performance machines using mechanical components like metering systems and boosters. Over the years, carburetor manufacturers have developed different metering systems which […]
Monday Mailbag: Setting Up a Brand New Carburetor for Optimum Performance
Q: I was shopping around for a new carburetor recently, and I noticed some carburetors being described as calibrated and ready-to-run out of the box. Is there really such thing as a “ready-to-run” […]
Mailbag: Examining Causes for Sporadic Spark Plug Fouling
Q: I have a mild 383-cubic-inch small block with 9.5:1 compression, Edelbrock Performer RPM intake, and 750 cfm Holley double pumper carburetor. It also has a mild hydraulic roller cam and roller rockers. My question […]
Carb Checklist: 9 Performance Issues that Can be Traced to Your Carb
The venerable carburetor is arguably the most recognizable hot rod part. That’s because the carburetor has been the crowned jewel of some of the most revered small blocks, big blocks, HEMIs, and six-cylinders to ever […]
