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Old 09-28-2009, 06:30 PM   #1
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Default what is a LY6

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
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Old 09-28-2009, 06:37 PM   #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
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Old 09-28-2009, 06:43 PM   #3
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The Heads Are l92 Ls3 style heads. To my knowledge this engine was intended to be a Marine crate engine for boats.

These complete look pretty pricey.

Hope this Helps.. I looked all this up just now. 5 minutes ago I knew nothing about this.
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Old 09-29-2009, 11:39 AM   #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.
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Old 09-29-2009, 12:36 PM   #5
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385 Hp on regular unleaded is impressive.

Pat
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Old 09-29-2009, 01:04 PM   #6
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It's what I'm still trying to find for my racetruck. They're a little pricier than an LQ4/LQ9, but you get L92 heads/induction.

-SS
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Old 09-29-2009, 01:31 PM   #7
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The LY6 is a 6.0l iron block with VVT with the L92 heads/Intake. Its used in the 07-09 GMT-900 2500HD/3500 Trucks and Vans.
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Old 09-30-2009, 11:53 AM   #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.
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Old 09-30-2009, 01:04 PM   #9
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thanks guys.
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Old 09-30-2009, 04:04 PM   #10
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Default (2) ly6 and 4L80e complete assemblies

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
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Old 09-30-2009, 06:04 PM   #11
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Nice motor you have there!

-SS
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Old 06-22-2010, 02:20 AM   #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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Old 06-22-2010, 08:18 PM   #13
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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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Old 06-22-2010, 08:21 PM   #14
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my build thread..i started workin on it again..i'll update it.http://www.ls1tech.com/forums/conver...t-boosted.html
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Old 06-23-2010, 01:14 AM   #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?
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Old 06-25-2010, 05:49 PM   #16
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Default ly6

I just finished putting one into my 73 camaro. I did a cam swap along with corvette intake. Getting it dynoed and tuned next weekend. Pulls like a beast! I'll post numbers after. I bought a complete crate motor for $2500.
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Old 06-25-2010, 08:25 PM   #17
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Quote:
Originally Posted by jamminj007 View Post
I'll post numbers after. I bought a complete crate motor for $2500.
From where?
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Old 06-25-2010, 10:08 PM   #18
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Default Ly6

I bought it from a member on here Jakeshoe He HAD several awhile ago. He also did a transbrake for my 4l80E
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Old 06-26-2010, 12:31 AM   #19
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I read somewhere this uses a returnless fuel system. Is that true?
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Old 06-26-2010, 01:07 PM   #20
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yes. You can swap to a LS3 intake to gain clearance and better looks (IMO)
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370, camshaft, crate, engine, ford, fouling, heads, horsepower, inconnel, ly6, motor, performance, plugs, spark, v8, valves

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