what is a LY6
#1
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What exactly is a LY6 ?
What years did they start making them and what did they put them in? What heads, Rect. port or normal LS1 port? Any block or head casting numbers?
I just want to confirm orclearify my understanding of this motor.
Thanks,
Jim
What years did they start making them and what did they put them in? What heads, Rect. port or normal LS1 port? Any block or head casting numbers?
I just want to confirm orclearify my understanding of this motor.
Thanks,
Jim
#2
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Specifications
2009
© 2008 General Motors Corporation
PRINTED IN U.S.A. 01/31/08
www.gmpowertrain.com
GM Powertrain
Type: 6.0L V8 (LY6)
Displacement: 364 cid (5967 cc)
Engine Orientation: Longitudinal
Compression Ratio: 9.6:1
Valve Configuration: Overhead Valves
(2 valves per cylinder)
Assembly Site: Romulus, Michigan
Valve Lifters: Hydraulic Roller
Firing Order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x Stroke: 101.6 X 92 mm
Bore Center: 111.76 mm
Bore Area: 648.59 cm2
Fuel System: Port Fuel Injection
Fuel Type: Regular Unleaded
Horsepower:
385 hp (287 kW) @ 5600 rpm
Torque:
400 lb-ft (542 Nm) @ 4400 rpm
Fuel Shutoff: 5600 rpm
Engine Mass: 539 lb (245 kg)
Emissions Controls: Positive Crankcase Ventilation (PCV)
Materials:
Block: Cast Iron
Cylinder Head: Cast Aluminum
Intake Manifold: Composite
Main Bearing Caps: Powder Metal
Crankshaft: Cast Iron with Undercut and Rolled Fillets
Camshaft: Steel
Connecting Rods: Forged Powder Metal
¶Cast iron deep-skirt cylinder block with six-bolt
main bearing caps that limit crankshaft flex and
stiffen the engine’s structure
¶Cast aluminum structural oil pan for additional
rigidity
¶High flow aluminum cylinder head design
¶Variable valve timing using a hydraulic cam phaser
to retard cam timing for low end torque and
advance cam timing for high rpm horsepower
¶Steel camshaft, hydraulic roller lifters, and steel
roller rocker arms for reduced friction and excellent
durability
¶Returnless fuel injection with stainless steel fuel rail
¶Electronic Throttle Body fully compatible with
electronic throttle control software in the MEFI-5
engine control module
¶Coil-near-plug ignition system with 58X crankshaft
position encoder, 4X cam sensor, and dual flat
response knock sensors for precise control of
ignition timing under all operating conditions
¶Iridium tip long-life spark plugs with improved “selfcleaning”
properties which decrease the potential
for plug fouling
¶External water crossover integrated into the water
pump casting so that no coolant flows through the
composite intake manifold
¶Inconnel (high temperature) exhaust valves for
long-term durability
¶Revised cam phaser for improved idle quality
¶Shallow sump oil pan for marine applications
¶Floating pin pistons which reduce noise and
increase durability
¶Heavy-duty timing chain with a new leaf spring
dampener to ensure quiet operation and long-term
durability
2009
© 2008 General Motors Corporation
PRINTED IN U.S.A. 01/31/08
www.gmpowertrain.com
GM Powertrain
Type: 6.0L V8 (LY6)
Displacement: 364 cid (5967 cc)
Engine Orientation: Longitudinal
Compression Ratio: 9.6:1
Valve Configuration: Overhead Valves
(2 valves per cylinder)
Assembly Site: Romulus, Michigan
Valve Lifters: Hydraulic Roller
Firing Order: 1 - 8 - 7 - 2 - 6 - 5 - 4 - 3
Bore x Stroke: 101.6 X 92 mm
Bore Center: 111.76 mm
Bore Area: 648.59 cm2
Fuel System: Port Fuel Injection
Fuel Type: Regular Unleaded
Horsepower:
385 hp (287 kW) @ 5600 rpm
Torque:
400 lb-ft (542 Nm) @ 4400 rpm
Fuel Shutoff: 5600 rpm
Engine Mass: 539 lb (245 kg)
Emissions Controls: Positive Crankcase Ventilation (PCV)
Materials:
Block: Cast Iron
Cylinder Head: Cast Aluminum
Intake Manifold: Composite
Main Bearing Caps: Powder Metal
Crankshaft: Cast Iron with Undercut and Rolled Fillets
Camshaft: Steel
Connecting Rods: Forged Powder Metal
¶Cast iron deep-skirt cylinder block with six-bolt
main bearing caps that limit crankshaft flex and
stiffen the engine’s structure
¶Cast aluminum structural oil pan for additional
rigidity
¶High flow aluminum cylinder head design
¶Variable valve timing using a hydraulic cam phaser
to retard cam timing for low end torque and
advance cam timing for high rpm horsepower
¶Steel camshaft, hydraulic roller lifters, and steel
roller rocker arms for reduced friction and excellent
durability
¶Returnless fuel injection with stainless steel fuel rail
¶Electronic Throttle Body fully compatible with
electronic throttle control software in the MEFI-5
engine control module
¶Coil-near-plug ignition system with 58X crankshaft
position encoder, 4X cam sensor, and dual flat
response knock sensors for precise control of
ignition timing under all operating conditions
¶Iridium tip long-life spark plugs with improved “selfcleaning”
properties which decrease the potential
for plug fouling
¶External water crossover integrated into the water
pump casting so that no coolant flows through the
composite intake manifold
¶Inconnel (high temperature) exhaust valves for
long-term durability
¶Revised cam phaser for improved idle quality
¶Shallow sump oil pan for marine applications
¶Floating pin pistons which reduce noise and
increase durability
¶Heavy-duty timing chain with a new leaf spring
dampener to ensure quiet operation and long-term
durability
#4
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The ly6 is found in the newest silverado and larger vans....and also in my brother's 1994 firebird.
We've got ours up and running correctly. Still working on the tach and speedo, but aside from that, it's 100%.
If anybody is interested in this swap, shoot me a PM and I can answer your questions.
We've got ours up and running correctly. Still working on the tach and speedo, but aside from that, it's 100%.
If anybody is interested in this swap, shoot me a PM and I can answer your questions.
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#8
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I got my LY6 for my Firebird from a local junkyard for $2000 complete with accessories, wiring harness and e38 ECU.
this engine is the best bang for your buck going - period.
this engine is the best bang for your buck going - period.
#9
TECH Senior Member
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thanks guys.
#10
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We have two LY6 6.0's with 4L80E trans assemblies complete and I mean complete takeouts, (less than 10 miles) for sale in Portland Oregon. Call me at 800-927-8750 or email me at mikef@fmitrucks.com for more info. $4900 each motor and trans assembly.
Thanks! Mike
Thanks! Mike
#12
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so are these full floating wrist pin? Is it pretty much the same bottom end as lq9 with different pistons? I have seen that they have a valve relief cut into the piston.
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connecting rods are forged powerd metal.more beefier bottom end.. they do have valve reliefs. i bet these motors will have the record for most hp stock bottom end..someone should test there limit with turbo..before i do!!.. in my 70 chevelle
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my build thread..i started workin on it again..i'll update it.https://ls1tech.com/forums/conversio...t-boosted.html
#15
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Are the cranks on these engines the same as the ones that are in the LQ4 LQ9? Seems like I have read somewhere also that the rods are the same in after 2004 is that correct?
#20
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yes. You can swap to a LS3 intake to gain clearance and better looks (IMO)