Why a new RS model?
With three decades of highly successful sales and performance accomplishments with our previous models, it was time to put everything we have learnt into the new Ultima RS flagship model. The new RS has market-leading levels of downforce via revised aero systems, perfected in the MIRA wind tunnel. Every design facet of the restyled Ultima RS panels results in an increase in performance envelope capability compared to previous generation Ultima models. Performance aside, the Ultima RS is a vastly improved and modernized supercar, with even greater levels of style, fit, finish, quality, safety, driver comfort, sophistication, usability, practicality and handling finesse.
The Ultima RS model is the most thorough and complete overhaul of the road legal Ultima ever to be released, with thousands of enhancement changes to specification.
The RS is a real milestone in our company's development. The result is truly remarkable – a car that is devoid of restraint and an improvement in almost every area.
What is the performance of the Ultima RS?
The Ultima RS has the overall performance parameter capability to surpass all world beating track times and performance statistics set by the previous generation Ultima cars.
Acceleration of 0-60mph in 2.3secs with a top speed capability of over 250mph being possible with the appropriate new LT5 drivetrain power output choice.
How are the aerodynamics improved on the Ultima RS model?
The design brief for the Ultima RS aerodynamics was to improve high speed stability whilst reducing the co-efficient of drag to achieve a more aerodynamically efficient car, resulting in market leading levels of downforce. Minimum co-efficient of drag achieved in the MIRA wind tunnel was 0.304 with the ability to adjust downforce to a maximum of over 1000kgs.
The front splitter has been engineered to mount directly to the chassis, thereby removing any flexibility and putting loads direct into the chassis. The optional carbon fibre version also incorporates diffuser ramps to the underside to increase downforce while minimising the co-efficient of drag. The integral vortex generators on the outside points help to control wake around turbulent air from the front wheels, at the same time giving smooth flow to the underside of front dive planes (if fitted). The carbon fibre front dive planes can be used to move the aero centre of pressure further forward and produce more downforce on the front axle. The only downside with using dive planes is that they will increase the co-efficient of drag.
The re-design of the front body has reduced the frontal area to a minimum and also adds a lower co-efficient of drag. At the same time it controls air flow over the leading edge and maintains a boundary layer over most surfaces. Now that the radiator has a totally uninterrupted flow of air it has improved cooling efficiency.
We designed an integral S Duct system for the front canopy. To control airflow at high velocity the entry into the radiator will generate a stagnation zone between high pressure and low pressure; this backs up in front of the radiator as speed increases and will bleed off through new slots in the front body stiffener moulding and exit on the top surface of the front body. This also helps with an additional small amount of downforce on the front axle while maintaining low co-efficient of drag. If air passes too fast through the radiator core you generate a boundary layer so the heat from the radiator cannot attach itself to air passing through.
The RS carbon fibre side splitters work in a similar way to the RS front splitter in that they separate airflow most importantly when the car is in yaw with medium and high speed cornering, this in turn will increase downforce on loaded tyres and prevent air rolling underneath the side pod and creating lift.
Front and rear wheel arch vents (available in body coloured gel coat or an exposed carbon fibre finish) generate downforce and reduce drag. Rear vents have the added bonus of allowing hot air to exit from the exhaust headers. The new RS carbon fibre side pod scoops come with integral NACA ducts and provide air flow for the air conditioning condenser and to the new LT engine air intake system.
The RS radiator exit divider is used to initiate air separation around the wiper arm and then further up the windscreen. The wake is used to divert the boundary layer either side of the roof scoop intake. This minimises hot air from the radiator entering the roof intake.
In full size wind tunnel testing we recorded an identical co-efficient of drag with side pod apertures completely blanked off versus side pod scoops fitted. This is due to having a very efficient exit point in the new RS rear wheel arch louvre vents. This resulted in additional down force and the centre of pressure to the rear axle increased.
New optional RS carbon fibre rear view mirrors have been moved to the front bulkhead area on the centre section to minimise disruption of the boundary layer over the top surfaces and improve airflow onto the rear wing.
To improve the efficiency of the RS rear wing it is now larger and the full width of the body. It is mounted on a new bespoke swan neck mounting system which transfers downforce directly to the chassis. The new swan neck mounting system has been engineered to increase downforce and reduce coefficient of drag, minimising wake to the bottom surface of the rear wing.
The addition of a new roof scoop has been used to improve air flow over the top of the car and maintain a boundary layer over the top surface. It also uses the intake air flow to assist in engine bay cooling.
The RS carbon fibre rear diffuser is a design feature added to enhance the appearance of the car whilst improving air separation off the rear canopy.
What are the engine fitment options for the new Ultima RS?
The engine options are the LS range of Chevrolet V8 engines (LS3/LS7/LSA) and also the latest generation Euro 6 compliant LT range of direct fuel injection Chevrolet V8 engines (LT1/LT4/LT5). The fantastic new LT range of dry sump, emission friendly and supremely powerful Ultima engine options further increases the number of countries we can export the Ultima RS into. We have developed an all new Ultima plug and play factory LT engine installation package specifically for the Ultima RS model to comply with the latest worldwide regulations.
Even with a base LS3 crate engine at 430bhp, the lightweight mid-engine Ultima RS can propel itself to 0-60mph in 3.3 secs and over 180mph. More than enough for some serious fun!
We will not sell the Ultima RS supercar to any individuals who seek to install a different type of engine, to protect and safeguard our brand identity, purity and engineering excellence of our marque. The Ultima RS is comprehensively designed and engineered around the Chevrolet LS and LT engine installation, with a no compromise approach.
Where do I buy the engine from?
To coincide with the new Ultima RS public release we now sell all of the Ultima engine packages directly from ourselves at Ultima Sports Ltd and can quote for full engine packages for all of our clients. We no longer use American Speed in the USA as our recommended engine supplier now that the new LT GM crate motors possess this magnitude of immense and reliable power output as standard. Our standard LT5 crate engine fitment makes over 800bhp in our Ultima application!
The engine is one of the last items that a client needs to purchase and install once the rest of your Ultima RS build is largely finished.
The Chevrolet LS3, LS7 and LSA GM crate engine specifications are available to view at these three links:
The Ultima RS model is also engineered to accept the latest generation of new direct fuel injection dry sump Chevrolet LT1, LT4 and LT5 GM crate engines, the specifications are available to view at these three links:
Customers are welcome to tune or upgrade their GM Chevrolet V8 crate engines themselves using an engine builder or tuner of their choice to any power levels that they desire. The engines are extremely tuneable to power levels in excess of 1200bhp for the new LT5 option - if you are feeling brave enough! The Ultima RS can handle it, can you?
Do you sell the new Ultima RS to my country?
Absolutely yes! We sell and ship worldwide from our UK factory. We don’t use any dealers or distributors as we prefer to deal directly with our customers. This allows us to offer the best possible pricing and factory support. We have already sold the Ultima into over 65 different countries and we won't be content until every country contains an Ultima!