2001 Chevrolet Corvette Coupe - U-Boat Commander

An Unexpected Underwater Excursion Led To Underhood Modification Of This '01 Coupe

Mike Magda Apr 1, 2004 0 Comment(s)
Corp_0404_01_z 2001_chevrolet_coupe Left_front_view 1/12

Wheel-to-Wheel created the front nose of the '01 Corvette shown here based on the Tiger Shark concept vehicle.

In late 2000, Alex Kawana had become tired of driving a rental car while his Mazda was being repaired. His frustration eventually spilled over to his two Southern California medical group partners who cured their impatience by ordering three new Corvettes. While his partners were content with their stock vehicles, Alex went the full-mod mode. His strategy was to build a streetable but race-bred Corvette that plays hard on the track yet is docile enough for a nighttime cruise.

Alex's black '01 features a coil-over suspension, bigger brakes, rollbar, fire-suppression system, body modifications, stroked engine and, of course, wheels and tires. It was Alex's interest in new rolling stock that started this ongoing project. His driving route often led past By Design Automotive Group, an upscale Los Angeles customizing shop best known for selling and modifying Porsches and Ferraris, but which also has experience with most late-model performance cars. Stopping by one day, Alex started talking about purchasing bigger wheels and tires, and ended up walking out with a $19,000 bill. "They have very good salespeople there," he jokes.

Corp_0404_02_z 2001_chevrolet_coupe Carbon_fiber_knob_on_shifter 2/12

The console is upgraded with a carbon-fiber knob mounted on a B&M shifter. Note the activation lever for the fire-suppression system.

Up front, By Design wrapped P245/35ZR19 Yokohama AVS Sport rubber around 19x9.5 HRE wheels. The rear received P285/30ZR20 around 20x11 wheels. By Design also installed 14-inch Brembo brakes on the front wheels. Engine breathing was enhanced with a Halltech cold-air intake, short-tube headers, a Bassani X-pipe, lightweight Z06 exhaust pipes, and a Magnaflow muffler. With this setup on the dyno jet, Alex's Corvette recorded a best of just over 313 hp at the rear wheels. Peak torque came in at 320.6 lb-ft.

In the winter of 2001, disaster stuck. Alex was driving through an unfamiliar hospital parking lot during a torrential El Nino nighttime storm. As he tried to make his way to the unlighted doctors' area, he hit a wall of water in a drainage area.

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Spicing up the engine bay are By Design carbon-fiber covers. Note the Halltech intake pipe.

"The water came up to the windshield. I could hear it being sucked into the intake as I was reaching for the ignition key," he says.

Remember that lesson from physics class that teaches liquids can't be compressed? The LS1 snapped a connecting rod that cut holes in both the oil pan and the side of the engine block. The car was towed to a Chevy dealer, which informed Alex that a replacement crate engine would cost over $12,000.

"I figured if I had to pay that much, I'd have a custom engine built," says Alex, who had the Corvette towed to Morgan Motorsports in Reseda.

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Up front are Brembo 14-inch brakes. Chicane applied the red epoxy coating.

Starting with a new block, Mike Morgan installed a 4-inch-stroke Scat crankshaft, Ross 0.010-inch-over pistons, and Callies connecting rods. The first cam choice offered 219 degrees at 0.050-inch lift, then Morgan went with a 229-degree camshaft. Total lift with stock rockers is 0.578-inch, and the lobe separation is 114 degrees. The heads hold 2.02-inch intake/1.57-inch exhaust valves, and were given a Stage II porting treatment. Final compression ratio is 10.8:1. Lubrication modifications include a blueprinted oil pump, cooler, and a 1-quart accumulator that pumps oil into the system should there be an unexpected loss of pressure, such as during hard cornering. Morgan left the stock injectors but added a Granatelli Motor Sports mass airflow sensor, an 80mm BBK throttle body, and long-tube B&B headers. Morgan's technicians recalibrated the engine-management computer during rear-wheel dyno testing. Final numbers: 431.4 hp at 6,000 rpm and 424.3 lb-ft of torque at 4,700 rpm.

Unbeknown to Alex, when the engine coughed up the connecting rod the violent action put kinks in the driveline. Uneven power transfer between the engine and torque tube eventually destroyed two clutches at the track. The problem was discovered when Alex was having the third clutch installed. He noticed a bow in the torque tube while twirling it as it rested upright against a wall, so a stiffer torque tube from a Z06 was installed along with a Star Performance (SPEC) Stage III clutch.

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