Ask Away! with Jeff Smith: Are Vacuum or Mechanical Carburetor Secondaries Better for My Street Car?
I’ve got a nice 3310 Holley 750 cfm vacuum four barrel carb for the 350 small block Chevy in my El Camino that I want to use because I think […]
Ask Away! with Jeff Smith: Octane & Carb Jetting Questions when Blending Ethanol Fuel
I’ve read a story you wrote concerning mixing E85 with gasoline to create a blended fuel with a higher octane. This sounds like an interesting change that might be worth […]
How (& Why) To Synchronize Your Motorcycle Carburetors
Before modern EFI showed up, many older multi-cylinder motorcycles often used a separate carburetor to feed each individual cylinder—so for a parallel twin engine, it may have two carburetors, an […]
Ask Away! with Jeff Smith: Advice on Running a Chevy Tri-Power vs. a Single Plane Intake Manifold
I’m going to have someone build a street engine for me and I want to use 1968 round port Corvette 400 hp Tri-Power manifold and carbs using one inch spacers. […]
Ask Away! with Jeff Smith: Is a 600 CFM Carburetor Enough to Feed a 454 Big Block Chevy Engine?
I am running a 600 cfm Edelbrock AVS carburetor on my 454ci big block Chevy in my Chevy C-10 truck. Is that hurting power any? Would I see a power […]
How a Stuck Carburetor Fuel Shutoff Float Valve Led to a Poor-Running Motorcycle (& How it Got Fixed!)
In contrast to a series of misadventures with other bikes, my 2000 CB 750 Nighthawk has been the epitome of motorcycle reliability. Yup, save for some leaky gaskets and typical […]
Ask Away! with Jeff Smith: How to Tune a Holley Street Avenger Carburetor for High Altitude Operation
My 670 cfm Holley Street Avenger carburetor on my 427ci Cobra engine (small block Stroker) has never worked properly since I have owned it. Just as your articles on tuning […]
Orientation Session: Your Fuel Filter’s Position May Impact How Your Engine & Carburetor Perform
Older cars and trucks are often packed with ingeniously simple solutions to potentially big problems. And we got reminded of that recently when it was time to replace the fuel […]
Ask Away! with Jeff Smith: Should I Drill Air Bypass Holes In All 4 Carb Throttle Blades to Improve Idle?
Recently you wrote an article that mentioned drilling holes in all four throttle blades on the Holley carb to change the blade position compared to the transfer slot. I have […]
Ask Away! with Jeff Smith: Understanding Carburetor Power Valve Channel Restrictors
I’ve read your article on carb tuning about 5 times. I have a 650 cfm SS-AN annular discharge Quick Fuel carburetor with the changeable jets behind the power valve. Are […]