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For gearheads who want to build or modify popular LS engines, How to Build and Modify GM LS-Series Engines provides the most detailed and extensive instructions ever offered for those modding LS engines through the Gen IV models.
The LS1 engine shook the performance world when introduced in the 1997 Corvette. Today the LS9 version far eclipses even the mightiest big-blocks from the muscle car era, and it does so while meeting modern emissions requirements and delivering respectable fuel economy. Premier LS engine technician Joseph Potak addresses every question that might come up:
Block selection and modificationsCrankshaft and piston assembliesCylinder heads, camshafts, and valvetrainIntake manifolds and fuel systemHeader selectionSetting up ring and bearing clearances for specific uses
Potak also guides readers through forced induction and nitrous oxide applications. In addition, the book is fully illustrated with color photography and detailed captions to further guide readers through the mods described, from initial steps to final assembly. Whatever the reader’s performance goals,How to Build and Modify GM LS-Series Engines will guide readers through the necessary modifications and how to make them. It’s the ultimate resource for building the ultimate LS-series engine!
The Motorbooks Workshop series covers topics that engage and interest car and motorcycle enthusiasts. Written by subject-matter experts and illustrated with step-by-step and how-it’s-done reference images, Motorbooks Workshop is the ultimate resource for how-to know-how.
From the Publisher
How to Build and Modify GM LS-Series Engines
You will find information related to the engines as a whole in this book, listed as “LS-series” throughout. Specific differences and changes per engine family will be isolated by specific name. The GM performance parts LSX block is listed as “GMPP LSX” when referring directly to that engine block. Also, when referring specifically to small or large power-adders, I would use the mindset of “small” being something the original equipment manufacturer (OEM) engine would handle. For N20 this would be 150 shot or less with the proper safety precautions and fueling. With boost, I would classify “small” as what the supercharger or turbocharger kit does in off-the-shelf form. If it produces 7 psi as supplied, that is what I would consider “small.” Large power-adders are anything above these as-supplied basic numbers and would normally require greater attention to specific areas of the engine buildup for durability or longevity.
These odd-looking towers are part of the active fuel management or displacement on demand (DOD) lifter bleed down holes (on all Gen IV engines). Not used on the LS2, these need to be plugged with the correct valley cover that includes O-ring seals to avoid internal oil leaks.
The 6.2-liter Gen-IV aluminum cylinder block (mostly known as the LS3 or L92) is found in certain SUVs and 2008 and newer Corvettes. It is similar to the LS9 engine block found in the 2009 Corvette ZR1 in terms of displacement dimensions. The 6.2-liter blocks have a 4.065-inch bore size standard.
The LS3/L92 6.2-liter has many similarities to the 6.0-liter LS2. The only difference is a 0.065 inch increase in bore size. The 6.2-liters, like most Gen IV engines, come DOD-equipped also, but the system is left unused. SUV 6.2-liters come with variable valve timing (V VT) progressively migrated to other applications.
The LS3/L92 block can tolerate a 0.020-inch overbore easily. Some have even bored these to 4.100 inch bore sizing. When getting that aggressive, it’s probably best to stay away from power-adders as the cylinder sleeve ends up quite thin.
Publisher : Motorbooks; First Edition (October 1, 2009)
Language : English
Paperback : 176 pages
ISBN-10 : 0760335435
ISBN-13 : 978-0760335437
Item Weight : 1.5 pounds
Dimensions : 8.25 x 0.5 x 10.75 inches
