At 8 psi of boost, on a cool day, using pump gas, Zuccone estimates the engine will put out between 630 to 650 hp. Either figure trumps the 525 hp of the 5.2-liter V10 and the 560 hp in the upcoming R8 GT.
It was 113 degrees when I drove it on the Bondurant track, with the track temperature above 150 degrees. EVOMS decided to dial it back from 8 to 6 psi of boost to play it safe but the car didn't lack for velocity. If anything, the engine catapulted the car soo quickly through the gears that I found myself into the rev limiter sooner than expected. The power forces you to stay on your toes and ready for the next upshift, but it's not the kind of power that slams the back of your head against the headrests. Instead, the power delivery has the linear, forceful surge of a jet during takeoff-the build-up, the stored energy, the release.
Combine that surge with an exhaust soundtrack that's raucous and raw enough to boil your blood. This may sound heretical, but its deep, burbling baritone is not unlike an American muscle car, albeit one with a more insistent, higher-strung tone.
There was some noticeable, but not debilitating, turbo lag coming out of slow Second-gear corners. It lasted only a split second before increased revs got the turbos to spin again, but it felt far from feeling like an "on-off" switch, a malady that plagues many large-turbo setups. And because it retains the stock engine's high compression ratio, drivability around town is practically the same as stock.
That day, the car was passed around among four drivers: Bob Bondurant; chief instructor Mike McGovern; the car's owner, Dan Withers; and myself. Despite being run hard in the searing temperatures, the water temperature gauge never moved from center, a testament to how thoroughly EVOMS sorted the cooling systems. Both Bondurant and McGovern gave the car high marks for power, handling, and brakes. Bondurant also noted the hint of turbo lag at low revs.
Props have to be given to the factory suspension and brake setups. As mentioned earlier, the brakes never faded throughout the afternoon. The suspension, set on Sport for the most part, handled the extra power well. If I had nits to pick, I'd say the rear springs/shocks could be a little stiffer to reduce the squat under hard acceleration, but it wasn't something that diluted the experience. EVOMS changed the stock tires to Michelin Pilot Sport Cups and they held up admirably, offering neck-straining levels of grip and a hard-wired connection of feedback through the steering wheel.
Zuccone says that by the time you read this, the kit will be ready to go. And if 630 hp isn't enough, they're also working on a fully built engine with new rods and pistons to withstand more boost. Zuccone expects to see 900 hp from that engine. With a larger intercooler, this kit can also be easily adapted to the 5.2-liter V10 engine. And it wouldn't be a surprise if EVOMS went all out with a fully built 1,000-plus V10 as well.
With this twin-turbo R8, EVOMS created something that not only gets it into the conversation with Porsche 911 Turbos and Ferrari F430s, it moves up a class into GT2 and Scuderia territory. Not bad company and probably where it should've been had Audi really wanted to build a halo car. EVOMS, however, is glad Audi saved some room for dessert. Special thanks to the Bob Bondurant School of High Performance Driving for letting us use the track.
EvoMs Twin-Turbo Audi R8
Longitudinal mid engine, all-wheel drive
4.2-liter V8, dohc, 32-valve.
Evolution Motorsport twin-turbo kit, liquid intercooled
Six-speed R tronic automated manual
Aluminum double wishbones, Audi Magnetic Ride shock absorbers
Eight-piston calipers and 14.4-inch ventilated rotors (f); Four-piston calipers and 14-inch ventilated rotors (r)
Wheels and Tires
OEM alloys, 19-inchMichelin Pilot Sport Cup
Peak Power: 630 hp (est.)