Bo185

Whats the difference between the 2007 L76 6.0L and L92 6.2L. I know the bore is different but they have the same heads and intake does the .2 liter make that much difference. Or do they have different cams? Tune maybe?

The L76 is 367 HP and the L92 in the caddy is 403 HP.

What gives!

Looks like the new L76 should make 400HP easy. Because it's basically a LS2.

Wnts2Go10O

iTrader: (12)

the displacement does make a difference. im not sure there is a different cam but it woul dmake sense.

Bo185

I think its the cam as well. Anybody have the cam specs for the VVT L92 and L76 cams. I am sure the tune is different as well because the L92 in the denalis are only rated for 380hp.

Rock_Daddy

iTrader: (8)

I dont have the cam specs but I have the entire stock L92 cam phaser thing and all the DOD valley pan stuff. I don't think the L76's have any of that. Since the phaser cam in the L92's moves around I;m not sure it compairing apples to apples if we did know the specs.

Bo185

The L76 has it the same as the L92

Rock_Daddy

iTrader: (8)

Oh, I wasnt aware of that.
So the only diffrence is the size I guess.

Bo185

And cam maybe that's what I was looking for actually.

The L76 engine is the new Vortecmax in the 07 Silverado trucks.


Vortec MAX 6.0L V8 engine features:
* From the family of redesigned Gen IV Vortec V8 engines
* Thundering 367 horsepower @ 5500 rpm
* 375 lb.-ft. of torque @ 4300 rpm
* More horsepower than any other half-ton 4x4 pickup(1)
* More torque than any light-duty engine offered by Ford(1)
* EPA estimated 15 city/19 highway MPG in 2WD and 4x4 models
* Deep inside the combustion chamber of Vortec engines, high-speed air movement generates a better fuel-to-air mixture
* Variable Valve Timing (VVT) technology that optimizes combustion, enhances low-end torque and high-end power, promotes fuel efficiency, and helps lower emissions
* A cast-iron crankshaft with undercut and rolled fillets
* High-flow cast-aluminum cylinder heads that feature a low-friction roller-rocker valvetrain
* Electronic Throttle Control provides outstanding throttle response, greater reliability and improved efficiency
* A faster, smarter Engine Control Module with more memory that better synchronizes the multitude of engine operations that occur every split second
* Hydraulic engine mounts for improved vibration isolation
* A coil-near-plug ignition system for a precise delivery of high-energy spark

Patrick G

iTrader: (14)

So does the L76 6.0L have the same rectagular port heads as the L92? I want to make sure it's not the cathedral port style head.

12secSS

iTrader: (30)

Patrick,

Yes, they both share the rectangular port, hence why you can use the L76 intake with the L92 heads on (say) an LQ9 for you F-body.

Question I have is, is the L92 intake a taller intake for Truck use, unlike the low profile L76? Truck guys might be interested in this, instead of the L76 intake (like me).

Bo185

They share the same heads I believe.

I think the L92 and L76 share intakes on the GM trucks. The tall truck style. The L76 everyone talks about is the Holden L76 car style from down under.

Is that right or wrong anybody?

383ss

iTrader: (14)

so the L76 heads are the same as the L92 heads except for a 4" bore?

Bring the Noise

The Trifecta - Displacement, Compression, and Lobe size (not confirmed)

The L92 is suppose to be 10.85 or 10.9 to 1 and the L76 is either 10 or 10.25 to 1.

I had linked to the spec's for both motors a couple of months back, but for the life of me I can't remember the web page for GM's technical tidbits....

...Edit...
Found it... doh
https://ls1tech.com/forums/showthrea...1&page=8&pp=20 about half way down.

The L92 is 10.5:1 (for some reason I keep thinking 9.75 for the other)... I know the L76 is suppose to have a lower compression then the L92 I can't remember if it's bellow 9.5 though.

LSs1Power

iTrader: (5)

I saw on a AUS board someone picking up 7mph and 40-50rwhp with just tuning the stock L76. So we can safely say it detuned BIG TIME. Its doing 290-295rwhp stock and 340-350rwhp with just a tune.

Bo185

http://media.gm.com/us/powertrain/en...07/07truck.htm
GM Media Online Engines Show current production engines specs and applications.

Wnts2Go10O

iTrader: (12)

holy crap... i need 918's baadd so i can see wht the ls7 cam will do with these heads.