Tech Feature: Engine Builders Have More Options Than Ever
The foundation of every engine is the cylinder block. Whether you are rebuilding a stock engine or building up a street performance engine, a circle track engine, drag engine, marine engine or whatever, you have to start with a good, solid block that’s machinable and free from cracks and other defects. That’s becoming more and more of a challenge in recent years because good cores for popular domestic engines are getting harder and ….
Tech Feature: What’s Rockin’ In Performance Rocker Arms and Valve Springs
Horsepower is in the heads. But for a cylinder head to breathe efficiently, the valvetrain must be rigid and strong to minimize flex, but also lightweight. For most performance applications, that means replacing the stock rocker arms, valve springs and pushrods with some type of aftermarket roller rocker arms, stiffer valve springs and stronger pushrods. The way in which rocker arms are designed has changed in recent years. Many companies now use sophisticated computer software to develop new rocker arm designs. An engineer sits down in front of a ….
Diagnostic Dilemmas: Servicing Quadrajet Carburetors
Introduced at the dawn of the emissions control era of the early 1960s, the “spread-bore” Rochester Quadrajet carburetor was considered leading-edge fuel delivery technology for the time. The “spread-bore” configuration consists of two small-diameter primary venturis designed to maintain high primary air velocities during normal driving for maximum fuel economy and low exhaust emissions. The
Puzzled by Carburetors
Although it’s hard to believe that nearly 20 years have passed since the last carburetor was installed on a mass-produced vehicle, carburetors are still the fuel system of choice for many off-road, street performance and track racing enthusiasts. In response to the performance market, aftermarket fuel system companies are now selling newly designed carburetors, updated
TechTravel: A Speedweek Racing Diary
Jim Linder “Fuel Injector Guru” needs no introduction to the readers of Underhood Service. His reputation as a technical writer and as a provider of quality technical training and electronic fuel injection service extends industry-wide. By now, many of Linder’s fans know that his record attempt was rained out by the third day of qualifying
Caddy Shacked
Taking on GM’s Big-Cube Engines By Doc Frohmader, restoration contributor While some engines are relatively rare in performance and engine machine shops, the big Cadillacs have remained a consistent source of income for these businesses. These engines are Cadillac’s last hurrah at traditional big-cube, flagship GM engines. Surprisingly, they are also a scaled-down version of
News: Babcox Publications Acquires Fleet Equipment & T3 Magazines
cations for the automotive aftermarket to now include the truck fleet equipment management and information technology (IT) arenas. These respected magazines, and their editorial staffs, broaden our reach and offer outstanding publications for the marketplace.” Each month, Fleet Equipment targets an audience of qualified fleet equipment managers who are directly responsible for specifying and buying
World Perspectives
Federal -Mogul Aftermarket group awarded “2004 Vendor of the Year”.
News: Underhood Service
CARQUEST Selects 2004 TECH-NET Professional/ASE Technician of the Year Raleigh, NC – Richard Robb of Elkhorn, WI, has been named the 2004 TECH-NET Professional/ASE Technician of the Year. Owner of Hi-Tech Automotive, Robb is an ASE-certified master automobile technician with L-1 certification. He was selected for the award after meeting the criteria set by CARQUEST