Pratt & Miller Corvette C6RS - A Flirtation In Florida

Pratt & Miller's Sizzling C6RS Proves A Potent Partner At SIR

Dr. Greg Johnson Aug 1, 2008 0 Comment(s)
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Ever since I heard about the Pratt & Miller C6RS project in July 2007, I've been coveting a chance to exploit the car's capabilities. I've worked with the P&M team and its Corvette Racing program for the last eight years, and I know full well its ability to engineer and produce a track weapon par excellence. Anything it builds is executed well, designed to take a beating, and tested for superb reliability and performance. If the team could produce a street-going Corvette with the DNA of its famous C6.R racer, the performance-car world would certainly genuflect at its feet.

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Sworn to secrecy over the C6RS's existence until its unveiling at SEMA last November, I had to bite my tongue every time ultra-performance supercars inspired a spirited conversation. When the car was finally revealed, in the form of a prototype built for Tonight Show host Jay Leno, it exceeded all expectations. Still, it was Leno's coveted ride-no chance to get seat time there. Then, in early February, I received an e-mail from P&M C6RS program director Mike Atkins: "Would you like to come to Sebring [International Raceway] while the racing team is tire testing with Michelin and drive the C6RS?" Duh! Cancel the week's scheduling and get me a ticket to Florida-now!

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By February of this year, P&M had produced three C6RS cars-Jay's black-on-red prototype, a sinister-looking primer-black test mule, and a sparkling Velocity Yellow convertible built for company principal Jim Miller. All three cars were to be at Sebring, along with the Corvette Racing team. I arrived at the track to find that four P&M/Corvette Racing transporters had spilled their contents into the paddock, and the team was busy preparing for the week's test regimen. Off to one side, the three C6RS cars and a new yellow Z06 were huddled under a transporter's canopy. The next couple of days proved to be as exciting a time as I have ever had driving cars.

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First Impressions
The first day, we had a chance to take out the test mule and see what it could do on the street. As I left the roadside, the pull from the 500ci, 600hp Katech engine was significant-downright massive, in fact. Shifting into Second, the rearend stepped out a little-the natural side effect of 600 lb-ft of torque-and the car pulled like the proverbial freight train. Grabbing Third, the C6RS literally felt like it wanted to take off. On the street, you'd be hard pressed to get past Third under full throttle and not be incarcerated for life.

Vemp_0808_05_z Pratt_and_miller_corvette_C6RS Ron_fellows 5/14

Self-preservation dictated backing off and quickly applying the brakes-another experience in itself. The standard Brembo brake package is capable of extreme deceleration, hauling the car down immediately without getting into lockup. Given the kind of velocity the C6RS is capable of, great brakes are a welcome companion. Ron Fellows has tested this setup on the track at Gingerman Raceway and reports no brake fade with 100-to-0 stops executed lap after lap.

OK, so acceleration is no problem, and the brakes are supremely up to the task. But how about getting around a corner? The C6RS turns in very smoothly and progressively-better, frankly, than the Z06 I drive as an everyday car.

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What is more impressive is the flat cornering posture the car takes as you apex the turn and track out. On the street, the car behaves as if it's on rails, with no perceptible lean whatsoever. This type of cornering attitude is usually achieved at the expense of ride comfort. The P&M engineers, utilizing a sophisticated air suspension system from Arvin-Meritor, have achieved a very compliant ride while maintaining exemplary cornering ability. In fact, the C6RS is even smoother and more comfortable than the factory Z06 when traversing bumps, expansion joints, and uneven pavement. The undulations found on the roads around the Sebring track simply melted away under the spell of the car's suspension setup, which is extremely surprising considering the performance of which those underpinnings are capable.

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Auto Exotica
Bringing the car back to the Sebring paddock was difficult, like returning an enchanting first date to her home-you just don't want to let go. But waiting for me was another temptress from the P&M family, the convertible C6RS. The first date's sibling was dressed in spellbinding yellow, and her seductive call was more than this poor soul could bear.

A push of the start button whipped 600 horses into a frenzy, and we were off. There was no extraneous clutch/gear action to distract us, since this C6RS was equipped with a paddle-shifted six-speed automatic. Transmission choice notwithstanding, the driving experience proved no less seductive. In terms of acceleration, there was no perceptible difference between the topless version and her svelter sister. Ditto the magnificent brakes and magic-carpet-ride suspension.

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