For more than 50 years, the classic Holley 4150-style four-barrel has remained a constant presence in the automotive world, as it evolved into almost countless versions for OEM and aftermarket ...

When it comes to carburetor tuning, there is literally "no substitute for experience." The most successful tuners possess a near-instinctual "feel" for fuel system problems, based on their years of ...

Doug Schriefer, Barry Grant's tech specialist for racing carburetors, would like you to know that-much as many stock car racers may think-carburetor tuning is not voodoo. It is true that many racers ...

A lambda probe (or oxygen sensor) can be found on the exhaust system of most cars running on unleaded fuel. Having reached its normal operating temperature (of about 600 degrees Celsius!) the lambda ...

Watch us rebuild a Rochester Quadrajet carburetor on a 1970 Chevy C30 using the original fuel system. This restoration demonstrates proper disassembly, cleaning, rebuilding, and tuning techniques. ⚙️ ...

With our M715 sucking down fuel at a rate of 4 mpg, we knew we had to do some-thing. We were running a Holley 670cfm Truck Avenger on our Chevy V-8, and thanks to an AEM wide-band O2 sensor, we knew ...