Early LGX Information
 

I thought I would kick off the LGX section now that we've seen the performance numbers. Hopefully we'll start seeing some bolt-ons real soon.

• The 3.6 liter V6 LGX engine is GM’s new high-feature V6 engine. It is a clean-sheet design and shares little with the 3.6L six-cylinder LFX engine it replaces.
• The LGX sets benchmarks for efficiency, refinement and durability compared to the LFX it replaces. LGX highlights include:
• Aluminum deep-skirt cylinder block from the LFX mill
• An enlarged bore of 95 mm (compared to 94mm on the LFX)
• Enlarged bore centers of 103mm (compared to 106mm on the LFX)
• An all-new cylinder head design
• A forged steel crankshaft
• High-strength connecting rods and pistons
• Oil-spray piston cooling
• Active Fuel Management (cylinder deactivation) and Auto Stop-Start system generate fuel savings of 9 percent compared to the 3.6L V6 LFX
• Improved Variable Valve Timing (VVT) with an ‘intermediate park’ feature
• Reshaped piston tops to promote a better mix of the air and fuel during the direct injection process
• Relocated oil pump under the cylinder block and inside the oil pan
• Acoustic engine cover
• Stronger, stiffer aluminum block with increased structure in the bulkheads for superior rigidity
• Tough, refined rotating assembly with a stiff forged-steel crankshaft, friction-reducing polymer-coated pistons and strong high-copper-content, sinter-forged connecting rods
• New four-cam phasing system with intermediate park technology that enhances efficiency by enabling late inlet valve closing in certain conditions
• All-new, patented “targeted” cooling system that provides strategic cooling of the engine’s hottest areas while simultaneously fostering faster warm-up to enhance efficiency
• New, higher-flow cylinder heads that enhance direct injection performance and feature integrated exhaust manifolds
• Revised, simplified timing drive system with cushioned chain sprockets contributing to quieter engine operation
• All-new lubrication system with a variable-displacement, two-stage oil pump that enhances efficiency. It is located inside the oil pan, which contributes to greater noise abatement

It's really the all around star if your looking for performance and MPG.

Start stop feature is nice for fuel savings.

I'll be part of the V8 crowd this time around, but you can bet I'll be checking in on you V6 peeps!

Here's what you want:

-intakes
-tunes
-ported throttle body
-ported or filled intake manifold
-high flow cat and catless pipe
-intake manifold spacer (1/2 to 3/4")

OK....no whos going to make this stuff for the V6 crowd.

Just some of these and you guys will be giving stock 5th gen L99s a hard time.

People are going to hate this auto stop feature trust me. I hate it on my Malibu so I disabled it.

Hopefully GM will allow the V6 Camaro peeps a way to disable this feature if they want.

Kaboom I agree with you that auto stop start blows.

Just leave the car in Sport mode lol. (yes I know...not the best solution)

Yeah, not being able to turn that off would be a deal breaker for me.

Is the auto stop/start feature on both Manual/Automatic?

Has there been any research done as to whether or not this is actually bad for the engine? Sure it must be hard on starters.

I live in a city and deal with the constant traffic issues and traffic lights. Think it would drive me insane.

I was watching a video about a 1969 428 Super Cobra Jet Mustang the other day, it was rated at 335HP, the same as the new V6.

What exactly is that? The engine shuts off?

Yes the engine shuts off at stops..some manufacturer s have it on the manual transmission as well. Its super annoying just my opinion..

See my responses to the above in red. I'm pretty sure spacers are a no go, at least at the moment. The intake runners are quite a bit longer... Unless you just wanted an all out torque monster, I don't think the spacers are good, Unless they put the LGX in the Colorado.

I'm working on the porting/filling of the intake right now, right out of the box, it's 12% better than the stock 12-15 LFX manifold, but 10% worse than my modified LFX intake manifold.

I'm just starting to play with it, but I've got a feeling that I can get it to flow at least as good as the ported LFX intake manifold, if not 2x better. This intake manifold is built to flow, it just needs a little helping hand.

You know what's funny about this? There is speculation that the 6th gen v6 may run a 13.3ish 1/4 mile time. An old family friend had a fully restored cream puff 1970 Mach 1 w/ a 428 SCJ, bone stock. That's real close to what it would run on a good day... It made me extremely happy to beat him repeatedly with my low budget SBC 355 in a heavy 71 Chevelle that was 4 different colors.

How did you do that ? tune, Range?...

Resurrecting this because i've noticed people referring to this feature when talking about AFM on the LGX in the 2016 Camaro.

It does not turn off at stop lights. It doesn't turn off at all unless you turn it off with the ignition button. The only AFM active in the V6 camaro is cylinder deactivation when cruising. This is and should be completely transparent to the driver unless they're watching the info screen that notes it.

im pretty sure that the lgx does not have cyl deactivation. ive never seen it say anything about it and dont have anything in the menu that states that it happening. i thing that the lt1 is the only one that does it in this gen

The camaro LGX has cylinder deactivation . It also,has start stop as a feature built in. . However it's not activated on the current LGX in the Camaro.

it does, drops to 4 cylinder mode. Goto one of the trip (a or b) menus and cruise for a bit holding steady on the accelerator. It'll drop to V4 mode and will show green (V6 is blue).

EDIT:
The problem is that people are reading this and the various sources where this info was taken from and thinking the 2016 V6 camaro turns off at lights. It just needs to be noted that their 1LT/2LT is not going to turn off at lights. Especially since this can be an annoyance to some people and turn them off the V6 before they ever learn that it's not an active feature.

right yeah it deff doesnt have the stop start function at least mine doesnt. i really wish it didnt have the cyl deactivation :/ although i never noticed it. that must be why its so quiet when cruising. upsetting

The stock exhaust and vehicle sound deadening is designed to be quiet during cruising. V4 mode is only activated in certain low load conditions (it wont even be in V4 mode if you are stopped at a light). You wont ever (or shouldn't if it's operating correctly) feel or notice it's effect when you are looking for "spirited" driving. It'll never have a chance to drop into v4 mode.

depending on if you have bose or not, it might be quiet due to noise cancellation. I hardly ever drive with my windows up so I still get some exhaust noise audible but with the windows up, the only way I hear it is if i'm accelerating hard. All the other car noises you hear are passive from the intake and tire noise.

Its all minutae anyway, you can get a Range AFM defeat for $200, and once you plug it in to the OBD port, it never goes into v4 mode. I have been using one on the LGX for the last 1000 miles and the AFM just goes away. No CEL lights, no alarms nothing, works perfect.

meh, it only turns on after a period when you're barely on the gas. Not when accelerating, at stop lights or anytime that matters. Basically free mpg with no downside. Some of the V8 guys have complained about transmission stutter potentially being linked to moving from v4 to v8 but I haven't felt anything in the V6 like that. I haven't seen any need to disable it for performance since it's default behavior is that it's not active during any times where performance is required.

i just tried really hard to get my car to do what you say it does and i cant seem to get it to change anything green. the only thing that changes to green is the fuel range gauge and thats because green means good and super low is yellowish. its green even when at half mgp. still not convinced the 3.6 shuts off 2 of the cyl. would seem kinda asinine for a v6 to have that. why wouldnt it also have the skip shifter if they where overly concerned with it?

..IT SHUTS OFF TWO CYLINDERS only On the automatic, not the manual shift.

im fully aware what it does thanks.i didnt know it was only for the automatic.

Do these cars have rev limiters to protect them from people re learning how to drive manuals?

This motor is engineering work of art. So much potential. I wish they would drop the twin turbo version into the Camaro.

http://gmauthority.com/blog/gm/gm-engines/lgx/

http://www.camaro6.com/2015/12/15/20...0-best-engine/

This motor is awesome! I have the NPP exhaust and it sounds incredible winding it out.

http://jalopnik.com/a-basic-2016-che...ing-1745827833

Auto Stop? My tach stays steady at stop lights with the manual 6 speed.

the lgx's auto-stop feature is not enabled on the camaro.

Another fun bit of info related to the LGX.

http://jalopnik.com/automakers-are-c...lds-1796305029

Or the video directly: https://youtu.be/nNendiDFzSM

good find on the new design!:w00t: the sad part is, some people will still say "this sucks cause I wanted to put headers on it."

you just gotta look at em and think, "wait so you want less power, performance, and efficiency....only to then add more weight...just so you can say you spent an extra 600$+ for something that would give you close to what you ALREADY have in stock form?"
:lol:

Nice read thanks

yeah,they were probably laughing when they rated it though.

They were laughing hard!! The 428CJ was around 420-430 stock.

What is different between the camaro V6 an the colorado V6 to make the extra 30 hp? The colorado has a different intake manifold and down pipes... And a tune I would imagine.

But are there any internal differences? Asking for a "colorado friend':)

Not sure.
Redline is supposed to be 7k?
I hit 7.2 once. :rolleyes:

Smokin' thread resurrection after 4 years :)

Yes, of course there is a rev limiter, the oil temp based limit and in-gear limit tables have 7200 rpm and extreme cutoff is at 7300 rpm on the 3.6 LGX, but it's still possible to money shift a manual car, the limiter can't always catch a very quick mechanical overrev.

Is the LGX in the 2017 RS/LT1 Camaro?

No the LT1 is the 6.2 V8. The LGX is the 3.6 V6

What was the years for the Lfx?