The twin-turbo system’s other components were all handpicked: a pair of Precision 6266 turbos and 46mm wastegates, dual 50mm TiAL blow-off valves mounted on the charge piping behind the front bumper, custom piping secured with Wiggins-style dual O-ring clamps, and even a 2.5-pound compressed-air system to regulate the pressure on the wastegastes’ diaphragms.

Other engine mods include a Nick Williams 102mm throttle body; Lindgren’s signature oil catch can/PCV system, alternator-relocation bracket, and valve covers; and a pair of stainless-steel tubular manifolds with 1.75-in primaries. The latter flow into 3-inch stainless downpipes, then on to a single MagnaFlow muffler and 8-inch center exhaust tip.

While the tire-melting Z retains its factory- issued Tremec six-speed manual trans, below the car is a billet-aluminum trans-tunnel plate that adds rigidity to the chassis while also preventing excess engine heat from entering the cabin. The stock 3.70:1 rear was left untouched.

Lindgren dialed in the combo personally, heavily modifying the stock tune stored on the E38 engine-control module. “We put a significant amount of time into the transitional and driveability elements of the tune to maintain that stock feel, but compensate for the…power adders. These areas are often overlooked by tuners who are just focused on a horsepower number,” he says.

“There are known limitations of [the LS7], but it does have pretty impressive capabilities. When our first complete power-sweep on low boost netted over 600 rwhp, we knew we had a monster on our hands. By the end of the dyno day, I was able to tune the Z to squeeze out 750 rwhp at only 8 psi of boost. We could have tried for more, but this was a comfortable number, and still more power than we felt we could use on the street.”

With his horsepower goals obtained, Lindgren set out to give the Z a more aggressive exterior appearance. To that end, he bolted up a Lingenfelter SV-4 supercharger hood, a ZR1 front splitter and side skirts, a Breathless Performance Products GT2 rear diffuser, custom-tinted side marker and LED taillights, and COR Forged concave wheels wrapped in sticky Toyo Proxes T1R rubber.

The interior, meanwhile, maintains a mostly stock presence, except for a four-point rollcage. An NLR Control Products AMS-1000 boost controller is stealthily hidden underneath the center armrest.

“Driving this Corvette is a ‘Dr. Jekyll and Mr. Hyde’ experience,” Lindgren says. “With the big, 7.0-liter LS7 and our custom exhaust manifolds, the turbos spool almost instantly. The acceleration is so violent, it’s like being attacked by an axe murderer. At the same time, the car is so refined and easy to drive that I have taken it to the grocery store more than a few times, without even thinking about the evil twins under the hood.

“I try to drive the Z frequently when the weather is nice, and it’s really a joy to pilot,” he concludes. “We’ve taken it to a few car shows in the area, and the reaction is always the same. People see this twin-turbo Z06 as a real supercar able to hold its own against any exotic sports car on the market today. They are amazed that we were able to pack such a large amount of stuff into a small area, and…by the craftsmanship and attention to detail. We regularly win some kind of award at the shows we attend, but the biggest reward for me is being able to share our work with others, and knowing that people appreciate what we do as much as we love doing it.”

SPEC SHEET
2007 Chevy Corvette Z06
Owner Karl Lindgren; Green Bay, WI
Block LS7 aluminum
Displacement 427 ci
Compression Ratio 11.0:1
Heads CNC-ported LS7 aluminum
Valves Stock titanium 2.200-in intake / 1.610-in sodium-filled exhaust
Camshaft Stock hydraulic roller
Rocker Arms Stock 1.8-ratio with offset intake
Pistons Stock hypereutectic aluminum
Crankshaft Stock forged steel
Rods Stock forged titanium
Intake Manifold Custom Lindgren Supercars aluminum with integrated velocity stacks
Throttle Body Nick Williams 102mm billet
Fuel Injectors Injector Dynamics 1,000cc
Fuel Pump Aeromotive Stealth Eliminator with boost-referenced pressure regulator
Ignition Stock LS coils with custom mounts, Taylor 10.5mm wires
Engine Management Stock E38 ECM, tuned by Lindgren Motorsports
Power Adder Lindgren Supercars twin-turbo system with dual Precision 6266 billet turbos and 46mm wastegates
Maximum Boost 12 psi
Intercooler Lindgren Supercars custom twin air-to-air with 4.5-in Garrett cores
Exhaust System Lindgren Supercars custom 1.75-in tubular stainless manifolds, dual 3-in pipes and merged tip
Transmission Stock T56 six-speed manual
Clutch ACT twin-disc
Driveshaft Stock
Rearend Stock with 3.70 gears
Front Suspension Pfadt Feather Light Generation SA Coilovers
Rear Suspension Pfadt Feather Light Generation SA Coilovers
Front Brakes Stock Z06 discs with six-piston calipers
Rear Brakes Stock Z06 discs with four-piston calipers
Wheels COR Cipher forged three-piece; 20x10-in (front), 20x13-in (rear)
Front Tires Toyo Proxes T1R 285/25ZR20
Rear Tires Toyo Proxes T1R 345/25ZR20
Fuel Octane 110
Current Mileage 22,000
Miles Driven Weekly Less than 50

Special Thanks
Lindgren Supercars
www.lindgrensupercars.com

Photos Courtesy Tyler Priewe and Minty Fotos