page_title: General Motors LS-based small-block engine
section_title: 7.0 L
hierarchical_section_title: General Motors LS-based small-block engine / Generation IV (2005–2020) / 4.125 in. bore blocks (2006–present) / 7.0 L
caption_attribution_description: 2006 Chevrolet Corvette Z06 LS7 7.0&#160;L V8 engine
context_page_description: The LS based small-block engine is the primary V8 used in General Motors' line of rear-wheel-drive cars and trucks. Introduced in January 1995, it is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small block V8 that preceded it as the basis for GM small-block V8s. The basic LS variations use cast iron blocks, while performance editions are all aluminium with cast iron cylinder liners.
  The LS small-block has been manufactured in three Generations – III, IV, and V – with preceding Generations I and II of modular GM small-block engines having been based on the Chevrolet small-block V8 originally released in 1954. GM recycled the "LT" designation beginning with the LS Generation V "LT1" in 2014.
  Several versions of the LS were used in the Chevrolet Corvette, beginning with the LS1 in 1997 through the LS9 and others in 2013. Variants of the LT version of the GM small-block have been used since.
  Most of the credit for this engine family must go to Ed Koerner, GM's Powertrain vice president of engineering operations at the time.
context_section_description: LS7
  LS7 can also refer to a 454 over the counter 460+ hp high compression engine Chevrolet Big-Block engine of the 1970s
  The LS7 is a 7,011 cc (7.0 L; 427.8 cu in) engine, based on the Gen IV architecture. The block is changed, with sleeved cylinders in an aluminum block with a larger bore 4.125 in (104.8 mm) and longer stroke 4 in (101.6 mm) than the LS2. The small-block's 4.4 in (110 mm) bore spacing is retained, requiring pressed-in cylinder liners. The crankshaft and main bearing caps are forged steel for durability, the connecting rods are forged titanium, and the pistons are hypereutectic. The two-valve arrangement is retained, though the titanium intake valves by Del West have grown to 2.2 in (56 mm) and sodium-filled exhaust valves are up to 1.61 in (41 mm).
  Peak output is 505 bhp (512 PS; 377 kW) at 6300 rpm and 470 lb⋅ft (637 N⋅m) of torque at 4800 rpm with a 7000 rpm redline. During GM's reliability testing of this engine in its prototype phase, the LS7 was remarked to have been repeatedly tested to be 8000 rpm capable, although power was not recorded at that rpm level, due to the constraints of the camshaft's hydraulic lifters and the intake manifold ability to flow required air at that engine speed.
  The LS7 is hand-built by the General Motors Performance Build Center in Wixom, Michigan. Most of these engines are installed in the Z06, some are also sold to individuals by GM as a crate engine. While it has the same displacement the Hennessey Venom GT utilizes an iron block LSX, not an LS7. The 2014 and 2015 z28 were the only Camaros to receive the 427 LS7.
  After an extensive engineering process over several years, Holden Special Vehicles fitted the LS7 to a special edition model: the W427. The HSV-tuned engine produced 375 kW (510 PS; 503 bhp) at 6500 rpm and 640 N⋅m (472 lb⋅ft) at 5000 rpm of torque. It was unveiled at the Melbourne International Motor Show on February 29, 2008 and went on sale in August 2008. The first Australian car to be fitted with this engine, however, was the CSV GTS of 2007, which was claimed to have a power output of 400 kW (536 hp) and 600 N⋅m (443 lb⋅ft).
  Applications:
  2006–2013 Chevrolet Corvette Z06
  2008 Spada Codatronca
  2013 Corvette 427 Convertible
  2007 CSV GTS
  2008 HSV W427
  2012 New Zealand V8SuperTourer
  2014-2015 Chevrolet Camaro Z/28
  Vertical Hummingbird helicopter
  2012–present Falcon F7
  2014 Korres P4
caption: 7.0 L LS7 engine in a 2006 Chevrolet Corvette Z06
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