In this installment, we tackle the rear suspension bushing installation and component installation. (more…)
Once all the original bushings are pushed out and the parts cleaned up bushing installation can begin.
There are a couple of things to be aware of before the first bushing is installed. The bushing bore must be clean and free of any snags of metal that may have been raised during the bushing removal process. Powder-coat or paint may also be in the bushing bore and should be removed to ease bushing installation. A raised area, whether it be paint, powder-coat or gnarled metal, causes the bushings inner sleeve to drag on the urethane, preventing smooth suspension movement. Unlike rubber bushings, urethane bushings should rotate smoothly throughout their suspension range of motion (one of the major reasons for the change to urethane). Too much clean-up of the bores is also a concern: the bushing should require effort to push in. You should be able to squeeze your hand and force the bushings in. (more…)
The Brock Yates’ One Lap of America endurance race, formerly known as “The Cannonball,” consists of a variety of challenges on the dry skid pad, drag strip, and racetrack. It is the equivalent of the Hot Rod Power Tour with track challenges at each stop. However, it is grueling because each night it is necessary to drive to the next event anywhere from 400-600 miles away, have your driving skills tested thoroughly the next day, pack up everything as soon as possible, and get on the road again. This happens continuously until the last day of the race. In addition, the entire circuit can take a team over 3,000 miles across the country, a true test of vehicles that are driven hard on the track and then subjected to a few hundred miles on the highway for a week straight. (more…)
Is your C4 plagued by body flex when you remove the top? This is a common complaint from most C4 owners. Cornering can feel rather uncomfortable with the top removed since the top provides a substantial amount of rigidity to the chassis. Unkempt roadways also cause problems that will eventually lead to squeaks and rattles.
The top is an integral component that helps to stiffen the chassis. When the top is removed the frame no longer is reinforced because the only frame member is below the doors. The door striker is the only other component that could be considered a source of reinforcement, but being such a small item, the support it offers is negligible.
Unfortunately, this lack of support leads to frame and body flexing which translates to ineffective cornering. It also begins to weaken the chassis as a unit. This became very evident in late 1986 when convertibles were introduced. As a result, all C4 convertibles were equipped with an underbody “X” brace. (more…)
What follows has been reprinted with permission from Corvette Online. Written by Clifton Klaverweiden.
Almost from the very start, the Corvette has been the performance flagship for Chevrolet, showcasing the best in power, handling, and overall performance General Motors has to offer. America’s Sports Car has evolved over the years to incorporate all sorts of new technologies – some, like the C4′s digital dash are best forgotten, while others, like the LS series of modern pushrod small block V8 engines, have shown that even ideas that have been around for a long time still have plenty to offer when given a high-tech makeover.
One piece of technology, the leaf spring, dates back to long before the first automobile, and yet the modern Corvette still makes use of this hardware, albeit in a very interesting and unique way. Is the transverse composite leaf spring suspension found in the C5 and C6 Corvette really holding these cars back, or can it get the job done on the street and at the track? Here, we’ll take a look at late model ‘Vette suspension upgrades from both sides – retaining the leaf springs, or switching to a coilover setup – to help you decide for yourself.