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 ….
Quotes and One Liners
Here are some quotes that resonate just as strong today as they did when they were first uttered. “People like to talk about a job well done and equally like to complain when a job is badly done.” Fred G. Wacker, President, Ammco Tools, May 1973 issue “Have enough faith in yourself to advertise your
Belt and Hose Inspections
Don’t Lose Potential Profits by Missing Replacement Opportunities
Carley’s Corner: Highlights of the AAPEX & SEMA Shows
Every year in early November, Las Vegas hosts two huge automotive shows, the Automotive Aftermarket Products Exposition (AAPEX) at the Sands Convention Center, and the Specialty Equipment Manufacturers Association (SEMA) show at the Las Vegas Convention Center. The two shows this year drew more than 100,000 attendees from all over the world. These are the
Tech Tip: Steering Position and Yaw
The Electronic Stability Control (ESC) program uses the Anti-Lock Brake System (ABS) and Electronic Throttle Control (ETC) to maintain vehicle stability in a cornering maneuver. The ESC program requires the communication between the Engine Control Module (ECM) and ABS controller. This communication takes place on the Controlled Area Network (CAN) buss of the vehicle. The program uses input from the following sensors: steering wheel position, throttle pedal position, throttle position, engine speed, brake switch, wheel speed, yaw and ….
Tech Tip: Rotor Runout Checklist
The vehicle owner may say that under light braking the vehicle pulses to a stop, or under heavy braking the vehicle shudders. Technical service bulletins (TSBs) often describe these symptoms as a "judder." There are only two causes for judder – lateral runout and disc thickness variation on the rotor’s friction surface. What could have caused the lateral runout? The causes of the condition range from ….
Rotor Runout Check List
The vehicle owner may say that under light braking the vehicle pulses to a stop, or under heavy braking the vehicle shudders. Technical service bulletins (TSBs) often describe these symptoms as a “judder.” There are only two causes for judder — lateral runout and disc thickness variation on the rotor’s friction surface. What could have
Steering Position and Yaw
Driving skills and Electronic Stability Control One of the first things a novice driver asks is: “Do I turn into the skid or away from it?” With Electronic Stability Control, this decision is made for us. When a vehicle begins to skid during a cornering maneuver, the skilled driver steers into the direction of the
Understanding Steering Quality
And Delivering a Good Driving Experience to Customers
Tech Tip: Kia Sedona Transaxle Range Switch Out of Adjustment
Some owners of 2002-’05 Sedonas may complain of MIL Illumination related to the transaxle range switch being out of adjustment. On vehicles that exhibit this condition, a transaxle range switch that’s out of adjustment may cause the following conditions ….