Chevrolet and GM Performance Parts - 2001/2002/2003/2004 Corvette LS-6 Engine

Chevrolet - 2001 / 2002 / 2003 / 2004 CORVETTE LS-6

The 2001/2002/2003/2004 Corvette LS-6 engines are the same engines that GM is putting in their 2001/2002/2003/2004 Corvette Z06. Keys - scperformanceeng, gmperformanceeng, or gmgoodwrencheng for SC, GM, or Goodwrench engines. Use allengine for a complete list of all three.
Chevrolet SITE STATS Chevrolet WEBSITE RANKING Use sallee-chevrolet.com in rankings search.

WEB SITE NAVIGATION INFORMATION

If you have you just came from a search engine and are stuck with no navigation, turn on Java Scripts in your Web browser, reload the page, then you can turn off Java Scripts again. Also, people using Internet Explorer have to use the pull down tab next to the back button to return to a search engine. More information on this is on our help page.

GM and Chevrolet part prices are in the Price & Parts search. Keys are to be used with the Price & Parts Search. Enter a Key, part number, GM, SC, or a key word, like 502, into the Price & Parts search to see if we have it on our site. Use GM for a list of both GM and GMPP parts. Use SC for a list of all Chevrolet exclusive parts. Aftermarket company prices are on downloadable Price Sheets or on their pages. The Page Search is for searching the pages of our Web site. More information on this is on our help page.

GEN 3 NAVIGATION

Gen 3 Engines And Parts Main Page	LS-1 Engine Kit Main Page
LS-1 Engine Kit Pictures	LS-1 Engine Kit FAQ
Corvette LS2 Main Page	2005 Corvette LS2 Engine Pictures
Corvette LS-6 Main Page (Discontinued)	2001 Corvette LS-6 Engine Pictures (Discontinued)
We have more GM and Chevrolet Performance Engines available. We have more GM Stock Replacement Long-block Goodwrench Engines available.

CHEVROLET CORVETTE LS-6 CRATE ENGINE


	Move over LS-1. Make way for the 2004 Corvette LS-6. An incredible 405 HP! Does not include wiring harness, computer, beauty covers, alternator, power steering pump, air conditioner, or starter. Old discontinued part numbers: 2001 (12561150), 2002 (12562181), 2003 (12562190) Note: Every year GM changes the part number on these engines and discontinues the old part number. Most of the time there is very little changed on the actual engine itself. We keep the old part numbers listed for reference only. This is a big help to people looking for a replacement engine for the one they currently have or for replacement parts. (Discontinued, Sold Out) 2004 LS-6 Corvette P/N 12578104
Type the part number in the Price Search for price.
2005 05 CAD CTS-V PRODUCTION ENG Since the 2004 LS-6 Corvette engine is no longer available, we are now substituting the 2005 Cadillac LS-6 engine for the Corvette one. This is the same engine as the Corvette one except it has a different oil pan. The P/N for this engine is P/N 17801268.

Brackets, wiring harnesses, and computers for the LS1, LS2, LS6 and LQ4 can be obtained from Street & Performance.
Street & Performance, Inc. #1 Hot Rod Lane - Mena, AR 71953 http://www.hotrodlane.cc/	Phone (479)394-5711 Fax (479) 3947113 [email protected]

LS-6 ENGINE¹
   Open the hood of the Z06 and you will notice it that the LS-6 doesn’t look much different from the LS-1. The only visible difference is the red composite engine beauty covers (Sold Separately). But underneath those covers, the small-block V8 has been completely worked over.
   “Part of how we got there was through an extension of our power curve,” explains Bill Nichols, powertrain vehicle system engineer for Corvette. “What that really means is extending the operating range of the engine by continuing to take advantage of it’s small block and light weight.”
   This entailed making a number of changes to the GEN III block, heads, and valvetrain as well as the intake and exhaust manifolds.
   A big part of the equation was allowing the engine to inhale more air quickly. Air is fed directly to the engine via front fascia openings as opposed to feeding from the bottom as on the LS-1. Once air enters the engine, it encounters fewer restrictions thanks to a new mass airflow sensor and a new, freer-flowing intake manifold.
   Cylinder heads are vital in managing airflow to the combustion chambers. The LS-6 heads incorporate new D-shaped ports that improve flow of the combustion gasses by 10 percent. The compression ratio has been increased to 10.5:1 from the LS-1’s 10:1 ratio.
   Taking advantage of the improved airflow is a new camshaft that increases valve lift by five percent - from 12.7 mm to 13.3 mm - which produces more power. Getting more air into the combustion chambers enables more fuel to get there as well. Thus, fuel injector capacity was increased by nine percent, from 3.3 grams per second to 3.6 grams per second.
   All told, the LS-6 can comfortably rev to 6500 rpm versus 6000 for the LS-1. This higher-revving capability also necessitated new, stronger valve springs.
   To eliminate buildup of air pressure inside the block as the pistons move through their downstroke at high rpm, small slots were cast into the block webs beneath the piston travel area. Approximately the width of a half dollar, the slots open up the bottom of the block, allowing freer air circulation inside. The reduced air resistance lowers parasitic power losses, further enabling higher-rpm performance.
   Helping exhaust gases exit more efficiently is a new cast-iron exhaust manifold that replaces the stamped and welded stainless-steel unit on the LS-1. Modern manufacturing methods allow thinner castings of iron, which makes it lighter. Yet it is actually more durable than stainless for sustained engine performance with no compromise in flow.

Note¹: Article Excerpt From Corvette Quarterly Fall 2000 Page 15 By Jerry Burton

2001 CORVETTE LS-6 5.7L 350CI ENGINE SPECIFICATIONS

SPECIFICATIONS ARE AS FACTORY INSTALLED IN THE ZO6
90-degree pushrod V8, OHV, aluminum heads, hydraulic lifters
Bore and stroke	3.90x3.62 in.
Displacement	346 cu. in. (5.67 liters)
Compression	10.5:1
Induction System	Sequential fuel injection
Gross Horsepower (SAE net)	385 @ 6000 rpm
Gross Torque (SAE net)	385 lb.-ft. @ 4800 rpm
Cam Drive	Chain
Recommended fuel	Premium unleaded
Valves per cylinder	Two
Redline	6,500 rpm

COMPARISON BETWEEN THE CORVETTE LS-1 AND THE 2001 CORVETTE

Item	LS-1	LS-6
Combustion Chamber	68cc	60cc
Compression Ratio	10.1:1	10.5:1
Horsepower	345 @ 5,600 rpm	385 @ 6,000 rpm
Torque	350 lb.-ft. @ 4,400 rpm	385 lb.-ft. @ 4,800 rpm
Redline	6,000 rpm	6,500 rpm
Suggested fuel cutoff	6,200 rpm	6,600 rpm
Cam profile	12.7 mm	13.3 mm

Other improved features over the Corvette LS-1

Revised head casting, exhaust port raised 1/4”. Revised intake manifold. Larger fuel injectors. New improved block to help cylinder breathing.

2002/2003/2004 CORVETTE LS-6 5.7L 350CI ENGINE SPECIFICATIONS

SPECIFICATIONS ARE AS FACTORY INSTALLED IN THE ZO6
90-degree pushrod V8, OHV, cast aluminum heads, cast aluminum block, hydraulic lifters
Bore and stroke	3.90x3.62 in., 99.00x92.00mm
Displacement	346 cu. in. (5.67 liters)
Compression	10.5:1
Induction System	Sequential fuel injection
Gross Horsepower (SAE net)	405 @ 6000 rpm
Gross Torque (SAE net)	400 lb.-ft. @ 4800 rpm
Cam Drive	Chain
Recommended fuel	Premium unleaded
Valves per cylinder	Two
Redline	6,500 rpm
Firing Order	1-8-7-2-6-5-4-3
Assembly Site	St. Catharines, ON
LS-6-Specific Higher Lift Camshaft As the intake air comes through the manifolds in greater volume, it is important for the air to enter the combustion chamber as quickly as possible to produce power. The LS-6 engine has a camshaft that has higher lift lobes than the LS-1, resulting in a 5 percent increase in airflow through the cylinder chamber.
LS-6-Exclusive Cylinder-Head Design At the heart and soul of the LS-6: unique cylinder heads for better engine breathing. Larger ports than those in the LS-1 engine also improve airflow by 10 percent. Compression ratio is a healthy 10.5:1.
LS-6-Mass Airflow Sensor Design The mass airflow sensor has been designed for enhanced airflow, contributing to the horsepower increase over the LS-1 engine. Greater air intake means greater power output.
LS-6-Positive Crankcase Ventilation System Because of the LS-6’s increased performance capabilities, changes were made to the positive crankcase ventilation (PCV) design to improve oil control during high-speed conditions (compared with the LS-1 PCV system).
LS-6-Specific Engine Block The all-aluminum LS-6 engine block has been refined to enable higher piston speed and higher overall rpm than the Corvette LS-1 block on which it is based. Hollow-stem intake valves and liquid alloy exhaust valves are lightweight and designed to maintain solid contact with the rocker arms during high-speed operation.
LS-6-Specific Engine Beauty Covers Vehicle owners are always being asked, “What’s under the hood?” With its red beauty covers, the LS-6 is as impressive with its hood up as it is on the open road. (Sold Separately)
LS-6-Fuel Economy Fuel economy is impressive: In the Z06 it gets an estimated MPG 19 city, 28 highway* with the standard six-speed manual transmission on the Z06. This will vary depending on the vehicle it is installed in and your driving conditions. *Note: Based on GM testing. Official EPA numbers not yet available.

2002/2003/2004 CORVETTE LS-6 WITH OPTIONAL ACCESORIES

Chevrolet can supply you with all the factory accessories to complete your LS-6 engine kit.
Note: The beauty cover is not cut away in the picture. The alternator is in front of the cover.