The Corvette C8 is far more than an evolution of the C7. Moving the engine behind the occupants completely changed the packaging of the car and gave Chevrolet the opportunity to rethink the suspension at the same time.
One of the biggest changes was the switch from the C7’s transverse composite leaf springs to individual coil springs at each corner. In our first look at the platform – How Good Is the Corvette C8 Suspension? – we explain what changed, why it matters and where there is still room to improve the car for serious circuit use.
Corvette C7 vs C8 Suspension: What Changed?
The C7, shown above, did not use individual coil springs at each corner. Instead, the front and rear suspension used transverse composite leaf springs running across the width of the car, paired with separate dampers and conventional anti-roll bars.
It was an unusual solution, but not a bad one. The composite springs were lightweight, sat low in the chassis and packaged neatly. They also contributed to the car’s roll stiffness, which meant the spring formed part of both the vertical wheel rate and overall roll-control setup.
The downside was that spring rate and roll behaviour were more closely linked. The C7 still used separate anti-roll bars, but changing the spring specification also affected how the car resisted body roll. That gave engineers less freedom to tune ride compliance and lateral control independently.
The C8 retains double-wishbone suspension at both ends, but replaces those transverse springs with individual coil springs mounted around the dampers. The coil springs determine the basic wheel rate, while the anti-roll bars can be used to add roll stiffness with relatively little effect when both wheels on an axle move together.
It is a more conventional layout, but also one that gives Chevrolet more scope to tune ride, grip, braking stability and traction independently.
Why the C8 Uses Coilover Suspension Instead of Leaf Springs
The switch to individual coil springs was made possible by the C8’s completely new mid-engine platform. Chevrolet was no longer trying to package the suspension around the architecture of a front-engined Corvette, so the structure, powertrain and suspension could all be developed around a clean-sheet layout.
Moving the engine behind the occupants also changes how the car behaves. The C7 already did a good job of centralising mass for a front-engined car, but the C8 brings more of the vehicle’s major masses towards its centre.
Reducing yaw inertia can make a car more willing to change direction, particularly through tighter corners and fast transitions. The car can rotate and settle more quickly, rather than feeling as though the mass at either end is resisting the change in direction..
There is another side to that, however. A more responsive car can also build yaw more quickly once the rear tyres start to lose grip. That places greater importance on suspension geometry, tyre behaviour, differential calibration, aerodynamics and electronic controls.
For a Corvette with increasingly serious track ambitions, a mid-engine layout combined with individual coil springs was a logical direction.
How the C8 Z06 Suspension Is Set Up for Track Use
The car featured in the video linked at the end of this article is a C8 Corvette Z06, powered by Chevrolet’s naturally aspirated, 5.5-litre LT6 V8 producing 670hp. This particular example is also fitted with the optional Z07 Performance Package and carbon aero equipment.
The aero package adds a larger front splitter, dive planes and a substantial rear wing. Optional carbon-fibre wheels also cut unsprung mass by a claimed 41lb, or 18.6kg, compared with the forged aluminium wheels. Averaged across all four corners, that is roughly 4.65kg per wheel.
Reducing unsprung mass makes life easier for the dampers because there is less mass for the suspension to control as the wheel follows the road surface. Lighter wheels also reduce rotational inertia, adding another dynamic benefit before any suspension geometry changes are made.
With serious tyres, sophisticated damping and meaningful aerodynamic load, the Z06 already has an extremely strong base for track driving.
Corvette C8 Camber, Ride Height and Alignment Adjustment
One of the C8’s biggest strengths is the amount of suspension adjustment Chevrolet provides from the factory.
Large lower control arm cam bolts allow camber to be adjusted at both the front and rear. Chevrolet’s own Z06 track alignment specification calls for around -2.0 degrees of camber at both axles, which gives a good indication of how seriously the chassis was designed to be used on circuit.
The Z06 also provides ride-height adjustment through threaded spring seats. These are fitted at the rear and, on cars without hydraulic front lift, at the front as well. Within Chevrolet’s specified adjustment range, this gives owners and engineers the ability to alter ride height and carry out corner-weight adjustments during track preparation.
That opens up useful scope for changing rake, static load distribution and overall chassis balance without immediately having to replace major suspension components. For a road car, the standard level of adjustment is impressive.
What Limits the Corvette C8 Suspension on Track?
Static alignment settings only tell part of the story.
Like most road cars, the C8 uses compliant rubber bushes at several suspension pivot points. These help isolate noise, vibration and harshness, but they also allow a degree of movement when the suspension is heavily loaded.
As cornering forces increase, the suspension arms can move slightly relative to their static position. The camber and toe measured on an alignment rig are therefore not necessarily identical to the values the tyre sees halfway through a fast corner.
On a car with the grip, tyre and aero capability of a C8 Z06, that compliance becomes increasingly relevant. Reducing unwanted movement can make the chassis more consistent without simply making the entire suspension harsher. The goal is to keep the geometry closer to the settings chosen during alignment.
Ride height changes introduce another consideration. Lowering the car changes the resting angles of the suspension arms, steering links and rear toe links, which in turn changes how those components move through bump and rebound.
One area we are particularly interested in is bump steer. Lowering a C8 does not automatically create a bump-steer problem, but any significant change in ride height can alter the relationship between suspension travel and toe change. If you are chasing precision on track, that relationship needs to be measured rather than assumed.
Suspension Secrets Corvette C8 Suspension Upgrades
This is where our C8 development programme starts.
One of the first upgrades we are working on is a monoball conversion that replaces the compliant rubber bushes throughout the suspension wishbones with motorsport-style spherical bearings. There are around 16 bushes across the suspension system and our kit replaces 12 of them.
The OEM bushes in the front lower control arms remain in place to retain consistent and predictable steering-system behaviour.
The principle behind the conversion is straightforward. Reducing unwanted bush movement keeps the suspension pickup points more accurately located under braking, cornering and acceleration, so the geometry stays closer to the values set during alignment.
That should give the driver more consistent feedback and make the car behave more predictably as loads increase. It is a similar philosophy to the rigid and spherical-jointed suspension connections used on highly track-focused road cars such as the Porsche 992 GT3 RS.
We are also developing adjustable bump-steer tie rod ends. These allow the steering link height to be altered with shims, giving us another way to optimise the toe curve when the ride height has been changed.
Adjustable rear toe arms will form another part of the package. The factory system already offers useful adjustment, but dedicated toe arms can provide a wider and more precise tuning range when running more aggressive camber and ride height settings.
Rear toe is particularly important on a powerful mid-engine car because small changes can have a noticeable effect on braking stability, corner-entry behaviour and traction as the driver gets back on the throttle.
How Good Is the Corvette C8 Suspension?
Very good.
The C8 is a major step forward from the already capable C7. Individual coil springs give Chevrolet more freedom when tuning wheel rate and roll stiffness, while the mid-engine architecture improves mass centralisation and gives the suspension a much cleaner platform to work from.
The Z06 takes things further. Factory camber adjustment, track-focused alignment settings, adjustable spring platforms, serious tyres, sophisticated damping and substantial aerodynamic load make it one of the most circuit-focused Corvettes Chevrolet has produced.
The next gains come from precision.
As grip levels rise and ride heights become more aggressive, bush compliance, bump-steer behaviour and fine geometry control become more important. Those are the areas we are concentrating on with the next stage of our C8 development programme.
The standard platform gives us a very strong starting point. Our job is to make the suspension geometry more precise, more adjustable and more consistent when the car is being worked hard on circuit.
This article is based on our YouTube deep dive: How Good Is the Corvette C8 Suspension? Part 2 covers the monoball kit, bump-steer tie rod ends, rear toe arms and the next phase of our C8 chassis development programme. The episode goes live on YouTube on Friday, 18 September.
