When a vehicle has raised suspension and this can be anything from 30mm or above, it will disrupt the vehicles relationship with factory set geometry and create issues such as…
Reduced caster correction – causing vague steering and response
Bump steer resulting in reduced handling – with an out of control feeling
Clearance issues to suspension & wheels/tyres – larger wheels can hit suspension components
Some standard vehicles can have an issue of the UCA hitting the coil on full droop,
Strength of OE equipment in offroad scenarios –
Roadsafe 4WD have developed their UCA range of product drawing from over 30 years of experience in the manufacture & supply of chassis parts including but not limited to steering & suspension components. The Blackhawk UCA’s have been designed in conjunction with industry experts to ensure vehicle fitment is comprehensive. In this process we identified a large number of issues that can be present, resulting in a list of features we included to overcome these issues…
3 degrees of fixed Caster correction, we’ve identified this as a good amount of correction required for lifts ranging from 30-70mm, by providing a bulk – fixed amount of caster, this offers the ability to utilise the factory adjustment to fine tune the caster required for your vehicles lift, with the UCA not being the limiting factor for increased droop relative to the other components.
Camber change to meet OE spec, if your application requires increased camber, we can offer offset bushings to provide more camber.
Clearance to larger aftermarket wheels & tyres – we often see larger than standard size tyres with wheel offsets having clearance issues to the OE UCA, our Blackhawk UCA’s minimise this as much as possible.
Clearance to suspension components & chassis – a large number of OE UCA’s hit the coil or the chassis mounts on during the suspension travel limiting the amount of travel you can achieve, with revised bends and clearances identified the Blackhawk UCA’s will not contact the strut or the chassis limiting travel unless specifically designed to do so.
Fixed position ball joint – Blackhawk UCA’s do not use an adjustable ball joint, with a fixed location ball joint we are able to offer OE specification for the ball joint itself.
The position of the ball joint housings have been rotated to ensure the ball joint is not the limiting factor with maximum down travel. Roadsafe specifically chose a fixed ball joint for a number of reasons – in offroad applications the ball joint receives a large amount of “bump” loads, which over time can either knock an adjustable ball joint out of position leading to increased tyre wear due to a change in caster. Changing from a fixed ball joint mount reduces the structural integrity of the mount and the mounting platform of the ball joint, with any remote traveling we need to ensure strength and reliability is not compromised.
There will never be a need to adjust or re-adjust your caster once established with the Blackhawk arms as the ball joint cannot be knocked out of position.
Maintain OE specification ball joint & bushings – regardless of where you may go, if you need to replace a ball joint or bushing you can use genuine replacement parts or aftermarket OE specification replacement items, regardless of how remote you are at home or abroad.
Ball joint binding – Often we see the ball joint limiting the amount of down travel because the OE ball stud hits the side of the ball joint housing, this creates a stress point on the ball stud creating an environment for potential terminal failure of the ball joint, it also limits the amount of down travel possible when used in conjunction with aftermarket suspension and longer shock lengths.
Securing ABS lines – we incorporate tabs and mounts where practical so the OE lines can be secured discreetly where possible, reducing the potential of sticks and other debris from damaging the sensitive lines.
Increased strength compared to the OE design – The design of the Blackhawk arms have shown with the use of FEA to be much stiffer than the OE arms, providing the driver with increased handling and response when the Blackhawk arms are fitted when compared to the OE arms, this is illustrated by the amount of deflection the FEA results have provided, with 3 times less deflection in the Blackhawk UCA’s.
Does this rigidity negatively transfer to the vehicle – No, because the Blackhawk arms use OE Rubber bushing, any NVH (Noise, Vibration and harshness) is absorbed in the rubber bushings before it makes it way to the chassis, you may find an increase in wear in the bushings which is directly related to how you drive the vehicle, the bushings are a consumable component of any vehicle, however you should expect years of trouble free service before the need to replace the bushings.