LS Engines

LS Engines / Tech Articles

How to Delete or Disable Active Fuel Management (AFM) on GM Engines

Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. It is […]

LS3 engine
LS Engines

LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance

(Updated 12/7/17) [Editor’s Note: This LS3 engine upgrade guide is the second in a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing. The […]

2009 Pontiac G8 LS3 Engine
LS Engines

LS3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More

Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got some […]

GM LS Engine
LS Engines

How to Identify an LS Engine

Before you begin your engine project, you need to know exactly what you have—and when it comes to General Motors’ 3rd and 4th generation LS small blocks, that may not be […]

March Performance Accessory Drive Pulley Kit for LS1 by Hot Rod
LS Engines

LS1 Engine Upgrade Guide: Expert Advice for LS1 Mods to Maximize Performance

[Editor’s Note: This LS1 engine upgrade guide is the first in a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing. The LS1 engine […]

LS1 Engine in a 1997 Chevy Corvette
LS Engines

LS1 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More

Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got […]

Chevy Truck with Junkyard LS
LS Engines

LS Engine Spotter’s Guide, Part 2: Matching the Engine to the Vehicle

Junkyard-sourcing a specific LS engine? If you’ve already got the LS or LS-based Vortec engine picked out for your project, this guide will tell you which vehicles came from the […]

Chevy Performance LSX 454
LS Engines

LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family

(Updated 10/09/2018) [Editor’s Note: You can find a comprehensive list of every LS and Vortec engine spec guide and upgrade guide we’ve published to date by scrolling to the bottom […]

LS Engine Swap
LS Engines

LS Engine Spotter’s Guide, Part 1: Matching the Vehicle to the Engine

So, you’re heading to the junkyard to see what LS engines are available for your next project? Here’s a handy guide that links specific GM vehicles to the LS-series engine […]