Nothing can derail a track day quicker than a car that doesn’t perform how you want at speed. If the back end is getting loose or your front end feels light or vague, it can lead to poor lap times, frustration, and potential safety concerns. Thankfully, there are some corrections you can make to resolve these high-speed stability issues.
Take a moment to learn about common concerns and how the right aerodynamic modifications can get you balanced and back on track.
How To Deal With Front-End Instability
A balanced aero setup, as seen on this Toyota Supra, will help you avoid high-speed instability.
You want to attack the corners, but it’s hard to do with a vehicle that’s lifting and losing grip in front. Known as understeer, this common high-speed stability issue occurs when there is too much front lift or insufficient downforce. You aren’t able to turn as sharply as you want, and you may drift or push to the outside of a corner.
If this is happening at higher speeds, you likely have an aero imbalance. The solution is often balancing out your rear mods with front-end components like splitters, air dams, and dive planes. Here’s an example of a top-end splitter for a Toyota Supra. You can also look at underbody airflow and try to eliminate turbulence.
Solutions For Rear-End Instability
Avoid oversteer by balancing front-end aero with rear components like this Porsche 981 GT4 wing.
On the other hand, you may be experiencing oversteer or rear-end instability. Getting loose in the back end not only impacts lap times but can also erode driver confidence, turning a fun day into a white-knuckle ride. Oversteer is often caused by adding front aero like a splitter without addressing the rear.
Consider adding rear-end components, such as a diffuser or a rear wing, like this one for a Porsche 981 GT4. If you already have a diffuser, there could be an issue with its design or installation that’s causing turbulence.
Balance front aero and significantly boost rear downforce with a V1X wing from Verus as seen on this Porsche 981 GT4.
Remove The Guesswork With A Verus Aero Kit
A complete aero package like this one for a Corvette C8 is a great way to avoid high-speed stability issues.
Most high-speed stability issues stem from aerodynamic imbalance. Whether you’re experiencing understeer, oversteer, or excess lift in both the front and rear, the best solution is a comprehensive aero package, not a single component. The aftermarket experts at Verus remove the guesswork by designing packages focused on balanced, predictable performance.
We typically offer multiple kits for each model, allowing you to choose one that matches your experience, needs, and budget. For example, we offer 3 packages for the popular 86 platform, including our entry-level Ventus 1 kit, which includes dive planes, a diffuser, and underbody panels.
Don’t Forget About Basic Setup And Mechanical Factors
It’s important to note that instability can result from a variety of factors. If you only notice it at speed or after making modifications, you likely have an aero imbalance. Otherwise, you may have some basic setup or mechanical concerns. The following can lead to stability issues:
- Tires: improper pressure, uneven wear, or the wrong tires for the application
- Suspension: worn bushings, blown dampers, ride height imbalance, and incorrect alignment
- Mechanical: differential issues, worn wheel bearings, loose chassis components
Achieve The Right Balance With Verus
Experts in aerodynamics, Verus Engineering designs complete kits to promote proper balance. Pictured is a CFD simulation of an MKV Supra with the Ventus 5 package.
Eliminate high-speed stability issues with the experts at Verus Engineering. We utilize advanced CFD software, 3D scanning, and track testing to craft exceptional components. Find your model in our online shop and get ready to lower your lap times!
High-Speed Stability Issues? See Why Aerodynamic Balance Matters