Chevrolet Corvette Stingray C7 Forum - View Single Post - Making Modern Horsepower the Old-Fashioned Way

unkillsam · 02-01-2007, 11:09 AM

Once GM get's the technology from the XV8 engine into a production car this will be a moot point. OHV V8's are here to stay.

http://www.acarplace.com/brands/gm/xv8-engine.html

With an aluminum block and head, the 4.3 liter XV8 has three valves per cylinder with an air-assisted direct fuel injection system and two camshafts in the block. Power ratings are 300 horsepower (224 kW) and 295 lb-ft (400 Nm) of torque.

Other features include variable inlet systems (currently the main feature of Chrysler's Magnum engines), cam phasing, and displacement on demand (first seen on the ill-fated Cadillac 4-6-8 engines), variable inlet valve timing (common to Toyota and Honda engines), a narrow 75-degree bank angle, twin oil pumps, and an integrated air compressor. A GM spokesman said this combination was possible, in its best form, because of the engine's clean-sheet design: there was no need to compromise new features to co-exist with existing designs. That was especially important for direct injection.

The XV8's compression ratio of 10.75:1 is achieved with regular gasoline.

02-01-2007, 11:09 AM	#5
unkillsam Drives: 2012 Camaro LT Join Date: Jan 2007 Location: Springfield, PA Posts: 104	Once GM get's the technology from the XV8 engine into a production car this will be a moot point. OHV V8's are here to stay. http://www.acarplace.com/brands/gm/xv8-engine.html With an aluminum block and head, the 4.3 liter XV8 has three valves per cylinder with an air-assisted direct fuel injection system and two camshafts in the block. Power ratings are 300 horsepower (224 kW) and 295 lb-ft (400 Nm) of torque. Other features include variable inlet systems (currently the main feature of Chrysler's Magnum engines), cam phasing, and displacement on demand (first seen on the ill-fated Cadillac 4-6-8 engines), variable inlet valve timing (common to Toyota and Honda engines), a narrow 75-degree bank angle, twin oil pumps, and an integrated air compressor. A GM spokesman said this combination was possible, in its best form, because of the engine's clean-sheet design: there was no need to compromise new features to co-exist with existing designs. That was especially important for direct injection. The XV8's compression ratio of 10.75:1 is achieved with regular gasoline.