General Motors LS-based small-block engine: Difference between revisions

Revision as of 12:24, 1 July 2025

Revision as of 12:32, 1 July 2025

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|{{Cvt|339-343|lbft|Nm|0}} at 4400 rpm, {{Cvt|347|lbft|Nm|0}} at 4000 rpm

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[[File:Chevrolet Corvette C5 Z06 LS6 engine.jpg|right|thumb|250px|GM LS6 engine in a [[Chevrolet_Corvette_(C5)#Z06|Chevrolet Corvette Z06]]]]

{{Anchor|LS6}}

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=====LS7=====

:''LS7 can also refer to a 454 over-the-counter 460+ hp high compression engine [[Chevrolet Big-Block engine]] of the 1970s''

[[File:2006 Chevrolet Corvette Z06 LS7 engine.jpg|right|thumb|250px|7.0L LS7 engine in a 2006 [[Chevrolet_Corvette_(C5)#Z06|Chevrolet Corvette Z06]]]]

The '''LS7''' is a {{cvt|7011|cc|L cuin|1}} engine based on the Gen IV architecture. The block is changed, with [[Cylinder (engine)#Cylinder sleeving|sleeved]] cylinders in an aluminum block with a larger bore of {{cvt|4.125|in|mm|1}} and longer stroke of {{cvt|4|in|mm|1}} than the LS2. The small-block's {{cvt|4.4|in|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 piston|hypereutectic]]. The two-valve arrangement is retained, though the titanium intake valves by Del West have grown to {{cvt|2.2|in|mm}} and sodium-filled exhaust valves are up to {{cvt|1.61|in|mm}}.