Vehicle information:

• 0-60 est 2.4 sec, RWD, estimate
• ¼ mile: 9.5 sec @ 150+ mph, estimate
• Top Speed 220 mph estimate
• 1,200 lbf downforce w/ ZTK pkg at top speed
• Exhaust provides 37 lbf Thrust at peak power
• Better ride than ZO6
• ZTK aero only is optional on base car, w/o suspension & tire changes
• 165 lbm more than ZO6
• Split rear window on coupe, which vents engine bay
• Coupe engine air intake on rear hatch
• ZTK adds rear brake cooling ducts on coupes hatch
• CF roof
• Tires same size as ZO6, 275 F & 345 rear
• New design 10 spoke CF wheels option
• New J58 Brake pkg, Longer fibers, dissipates heat better and front is 400mm F rotors 13.7in (larger) and thicker for more thermal mass
• Larger rear wheel bolt diameter, due to increased torque output
• Beefed up 8 speed transmission
• No front trunk
• Same interior
• Blue calipers
• Wishbone rear vent for rear brakes
• Clint Simone GM development driver
• 3,670 lbm dry mass, 236 lbm more than ZO6
• 3.5 lbm/hp
• 80 to 200 to 80 = 24.5 sec, 22% faster than 19 ZR1
• Not limiting production volume
• 15 total heat exchangers
• Cargo Volume = 9.1 cubic feet
• LT7 engine: 5.5L V8 flat plane crank, twin turbos 76mm
o 1,064 hp @ 7.000 rpm, 828 lbf-ft Torque @ 6,000 rpm
o 8,000 rpm redline
o 800 lf-lbf 3000 to 7000 rpm
o Most powerful V8 in a car
o 193 hp/liter
o Twin turbos (76mm compressor wheel) w/ integral exh manifold-turbine housing, reduce volume for turbo lag reduction, virtually no lag = smart engine engineers.
o Turbo/engine air flow > 600,000 liters/min.
o Added scavenge oil pump stage for turbos, 7 total
o 850 hp was original goal, engine guys always over perform. Heart of Corvette.
o 24 psi peak boost, 20 psi nominal
o Air system operates like 2 independent 4 cyl making 532hp from 2.75L
o Secondary port fuel injection, used at idle & employed +80% of the time
o Beefed up piston, con rod and wrist pin
o Compression ratio 9.8:1, down from 12.5:1
o 4.5 mm shorter conrod and taller piston
o New head casting w/ ports at different angles
o New cam profile /timing w/ less overlap
o 2 separate intake manifolds w/ reduced volume, one for each bank
o PFP 11 MPa up from 8.5 MPa on LT6, 130%
o Max fuel consumption = 2 gpm at max output or top speed, 35 miles range, refuel <10 minutes

LT7 Twin-Turbocharged 5.5L DOHC VVT DI

Bore & stroke (in. / mm): 4.104 x 3.150 / 104.25 x 80
Block Material: A319 cast aluminum with cast-in iron cylinder liners and four-bolt main bearing caps
Oiling System: Seven-stage dry sump (8-qt. capacity) with oil-spray piston cooling
Oil Type: Dexos R 5W50 synthetic
Cylinder Head Material: A356 T6 cast aluminum
Combustion Chamber Volume: 59.92cc
Compression Ratio: 9.8:1
Valvetrain: Dual overhead camshafts (four valves per cylinder) with mechanical finger-follower valve train and dual-coil valve springs; dual-independent camshaft phasing
Valve Size (in. / mm): 1.77 / 45 titanium (intake) & 1.37 / 35 sodium filled Nimonic (exhaust)
Fuel Delivery: PDI (DI – Max pressure: 5,076 psi (35 Mpa / 350 bar) & Port Fuel Injection)
Firing Order: 1-4-3-8-7-6-5-2
Throttle Body: Twin 65mm single bore (electronic)
Charging: Twin 76 mono-scroll ported shroud ball bearing turbos (67mm MAR compressor), E-Waste gates
Charge Cooling: Dual engine-mounted water to air charge coolers
ECU: GM E68 (32-bit processing)
Horsepower (hp / kW): 1,064 / 873 @ 7,000 rpm
Torque (lb.-ft. / Nm): 828 / 1123 @ 6,000 rpm

Estimated power and torque curve:

Mar is used in the 2 turbochargers of the LT7 engine, 1,900F tolerant:

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