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Hahn/QA1 Slingshot Coilovers FAQ

Why are my stock coilovers lacking?

Besides the fact that they are not adjustable to suit your preferences, they are effectively concessions to cost while aiming for an “average” feel, so as to suit the most owners. As compared to our Hahn/QA1 Spherical Coilovers, stock coilovers do not enhance handling prowess, and they are rather harsh as well, transmitting more road imperfections into jarring and jouncing of the machine. They’ve earned the fun nickname of “Pogo Sticks” for a number of real reasons!

Changing to a quality alternative like Hahn /QA1 is one of the more profound changes you can ever make to your Slingshot. You’ll be impressed at not only how handling is greatly enhanced, but also at the supremely improved road feel and preciseness. You will feel connected to the road in new ways that will make the stock coilovers feel vague and rough in comparison, yet you’ll also have a smoother, more enjoyable ride. As a bonus, you can also easily change the firmness settings anywhere, anytime, to suit the task at hand, as well as to choose the ride height that best suits you.

What is the difference between Double and Triple Adjustable?

Double Adjustable can be adjusted for both ride height and damping (firmness). Triple Adjustable are also adjustable for height, but take the damping adjustment a step further by adding separate damping adjustments for compression and rebound (more on this shortly).

How do I physically adjust damping?

Via an easy-to-access knob that is detented for “clicks”. In the Double Adjustable, a single knob is used that affects both compression and rebound. In Triple Adjustable, two detented knobs are provided, one for compression damping, one for rebound damping.

Do I need to adjust ride height?

As they come, no. During our precision build process, we pre-set the height to stock. We do provide a spanner wrench kit with each order that allows ride height adjustment, for those who wish to either raise or lower their Slingshot. Ride height adjustment is achieved via the large spanner nuts that anchor the spring to the coilover body.

Do I use the spring adjustment to change ride firmness?

No. A common misconception is that the spring adjustment will vary the firmness of the spring via more “preload”. The spring cannot be pre-loaded in this instance, it will always sit at the same installed height as a factor of the vehicle weight. The spring adjustment only controls ride height.

Do I need an alignment after installing my Hahn/ QA1 coilovers?

As we pre-set them to stock height, no re-alignment needed…you are good to go as they come. Should you choose to lower or raise your Sling via the height adjustment, an alignment is a good idea, as this will change the front end suspension angles. Slight lowering does not always require re-alignment, as it actually improves suspension angles from a performance standpoint. A drive-belt re-adjustment should also accompany a change in rear ride height.

Can I use Hahn/QA1 Coilovers for a smoother ride than stock?

Absolutely. Setting the damping at full soft will give you a ride that’s been favorably compared as having a Lexus-like luxury quality. It’s perfect for long highway cruises to reduce fatigue and harshness. Then, when you get to the twisties, reach in and turn the easily-accessed knobs to your favorite settings for performance handling. Time to make that long run back home? Crank them back full soft again, and luxuriate in silky smoothness all the way to your door.

What are Spring Bearings, and do I need them?

Spring Bearings sit between the spring and its adjusting nuts. For those who perform height adjustments often, such as racers, these make the adjustments smoother and easier on the parts, for spring pressure is strong. If you plan to adjust height regularly, they are a great idea.

Do I want or need Triple Adjustable?

Only if you demand maximum adjustability for road-racing or hyper-street style use. The separate rebound and compression damping knobs allow the racer or skilled enthusiast to tune his or her suspension to the ultimate degree. Knowledge of the difference in the two settings, and how to maximize them independently of one another, is essential. The Double Adjustable have 18 possible damping settings, while the Triple have over 300! By far, the most popular choice is Double Adjustable, which is still amazingly effective in terms of its performance and range of adjustment.

Should I also upgrade my sway bar to further improve cornering?

You may, but you may also wish to try upgrading coilovers first and see if your handling is improved sufficiently first. Let’s have a quick look at the dynamics of each:

The term “sway bar” is a bit un-descriptive, at least on modern vehicles. It is more effectively regarded today as an anti-roll bar. It attempts to diminish body roll in corners, which is the tendency to compress the suspension on the outside of the corner while extending it on the inside. The anti-roll or “sway” bar does this by tying the left and right lower control arms together. A stiffer upgraded bar twists less in cornering, keeping the lower control arms in a similar relative position to one another, thereby reducing body roll and keeping the machine “flatter” for improved road grip and handling.

Upgraded coilovers perform a similar function of reducing body roll, but achieve it via different means. In this case, a stronger spring rate and a firmer shock valving similarly resist the body rolling effect, and like a stiffer swaybar, keep the machine much flatter in hard cornering.

As such, many folks will be delighted with the improvement coilovers make to body roll, and may not wish to employ a stiffer sway/antiroll bar. The thing to keep in mind about heavy sway/antiroll bars is that due to their intention of being harder to twist, there is an inevitable degradation of ride quality, a sacrifice to the fact that the front wheels cannot move as independently of one another. As the left and right suspensions are more stiffly coupled together, road imperfections get transmitted to both sides, and extra harshness is felt as the “bump” gets transmitted through more of the vehicle.

Moral of story? It’s all up to the individual’s desires. We like choices! If one wishes to go at this progressively, we suggest starting with the coilovers, and then add the sway bar later if one is still looking for maximum cornering with somewhat less regard to smoothness. If one already has a sway bar, no problem…you may well utilize lower damping firmness with our adjustable coilovers to help compensate. Many may find that the coilovers are enough to suit them, all on their own.


Click Here to learn more about Hahn/QA1 Spherical Coilovers for Slingshot!

I hope you’ve found this FAQ helpful. If you have any other questions, feel free to ask me at sales@hahnracecraft.com, or call 352-486-2195




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