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Lotus Evija's wild aero setup is detailed by chief aerodynamicist

The Lotus Evija is a car of firsts for Lotus. To that end, the company has spent a lot of time talking over the details. Today, we get to learn about the wild shape’s aerodynamics and what Lotus engineers were trying to accomplish. Richard Hill, chief aerodynamicist for Lotus takes a dive into all the details, and the video at the top of this post offers a great visual. “Most cars have to punch a hole in the air, to get through using brute force, but the Evija is unique because of its porosity,” Hill says. “The car literally ‘breathesÂ’ the air. The front acts like a mouth; it ingests the air, sucks every kilogram of value from it – in this case, the downforce – then exhales it through that dramatic rear end.” We can see what Hill means as we look at the Evija in photos. Instead of a regular front bumper, this one has pass-throughs that direct the air back into the side of the car. Lotus hasnÂ’t released the all-important coefficient of drag figure yet, but we have to imagine itÂ’s very low. The front splitter (below, left) is responsible for a few different things. The opening in the center takes in air to cool the battery pack that is mounted behind the seats. Then, the outer section of the splitter channels the air to the “e-axle” for cooling of the electrical components. And finally, it also produces downforce.  There are a couple more tunnels for air to pass through in the rear. These “holes” are likely the most distinctive design feature, especially when accentuated with the LED taillights. Hill says that these are also fully functional and help to reduce drag. “They feed the wake rearward to help cut drag,” Hill says. “Think of it this way; without them the Evija would be like a parachute but with them itÂ’s a butterfly net, and they make the car unique in the hypercar world.” On top of all these porous body structures, there are pieces that move. The rear wing can elevate upward from its flush body position and deploy into clean air above, creating more downforce. And then thereÂ’s an F1-style drag reduction system. This uses a horizontal plane that deploys from the car to make it slipperier through air. The final big piece of this puzzle is the underbody sculpting that directs air into the massive rear diffuser. This causes an upwash of air, in turn creating a massive amount of downforce. Hill sums it up quite nicely.

Lotus Elise Sprint adds lightness to lightness

Lotus announced the introduction of a new Elise trim level that exemplifies founder Colin Chapman's famous phrase of "simplify and add lightness." The new Elise Sprint combines the weight savings of the current standard Elise, along with a number of Sprint-exclusive parts for what Lotus claims is the model's most significant weight loss yet of about 90 pounds over the old model, bringing the car's dry weight (not curb weight) to 1,759 pounds. The exclusive Sprint parts account for about 57 pounds of that loss. They include a lithium-ion battery, forged wheels, polycarbonate rear window, and carbon fiber for the seats, roll bar cover, engine cover, and access panel. Interestingly, the biggest savings come from the lithium-ion battery, which is roughly 20 pounds lighter than the normal battery. Lotus also includes the optional two-piece brake rotors and carbon fiber door sills to reach the 90 pound total. This all translates to slightly quicker 0-60 mph times for Elise Sprint models over their Sport counterparts. Both the 1.6-liter 134-horsepower Sprint and 1.8-liter 217-horsepower Sprint 220 models complete the run to 60 mph a tenth of a second quicker than the equivalent Sport versions, with times of 5.9 and 4.1 seconds respectively. The weight loss also results in a price gain. For either Sprint model, you'll end up paying an extra GBP5,000, which is a bit over $6,100 at current exchange rates. Of course, the Elise isn't available in the US anyway, so it's a moot point. Related Video:

Lotus reveals an even lighter version of the Elise Cup 250

For an automaker with very few resources, Lotus manages to keep things relatively fresh. The new Evora 400 is a blast to drive, even if it is just a heavily revised version of the car that debuted in 2009. The current Lotus Elise debuted back in 2010, and though it may have departed from our shores, Lotus keeps customers worldwide happy with a plethora of new variants. The latest model is the lightweight Lotus Elise Cup 250. Now, this isn't the same Elise Cup 250 that debuted last year, though the two cars are very, very similar. The main difference is weight, as is typical with a Lotus. Colin Chapman's tried and true saying, simplify and add lightness, is still true here. The new model weighs just 1,895 pounds, or 1,948 without the lightweight package. Last year's Elise Cup 250 was already quite svelte at 2,053 pounds. While you may think that shaving that much weight from an already light car must be the result of black magic or a localized black hole, the truth is far more simple. The Elise Cup 250 makes extensive use of carbon fiber, titanium, and aluminum for components like the bodywork, exhaust, and wheels. The rear window is plastic instead of glass, and the standard lead-acid battery is replaced with a lithium-ion battery. The rest of the car remains mostly unchanged. The car is propelled by a 243-horsepower supercharged 1.8-liter inline four. It can hit 60 mph in just 3.9 seconds, quicker than the more powerful Evora 400. There's plenty of aero to keep the car planted, but it's not a pure track car like the Exige. The Elise Cup 250 still comes with a full interior with a stereo, though there's no mention of cupholders. As exciting as all this may be, the Elise Cup 250 won't be coming to the US. Unfortunately, airbags and crash structures all add weight. For everyone else, the Elise Cup 250 is at dealers now. Related Video: Featured Gallery Lotus Elise Cup 250 News Source: Lotus Lotus Lightweight Vehicles Performance