Does anyone know the exact differences between the LS2 and L76?

The L76 is the motor in the G8 GT.

I believe both use the LS2 block but the L76 has completely different heads and a very tiny cam.

Anyone know more?

 

anyone?

 

LS2 catherdral port heads 243's
L76 rec port heads L92's type

LS2 no DOD,AFM,VVT
L76 VVT,some have DOD, and were replaced with AFM

The DOD and AFM most guys do not want to deal with cyclinders being shut of for gas mileage in an performance application.....

This was enough right here to make me say fugg a L76, I would go LQ9,LS2,LS3, LSX376, LSX454, etc.... 6.0+

 

I believe the bore is different also.

 

L76 uses the L92 heads, a AFM cam, and the LS3 intake. A signal from the ECM [that signal comes from throttle position and speed] determines when the AFM turns on or off. The lifters in 4 cylinders will then turn off or on. The lifters are activated by oil pressure. That's why the G8 holds 8.8 quarts of oil.

All you have to do is pull the cam, lifters, and springs and you'll have a nice running engine.

My L76 makes 426hp with a mild cam and pushes my 4000 lb turd down
the 1/4 at 11.81@117

 

Much appreciated!

 

Both have a 4.00 bore. L76 uses a smaller valve than the L92. Block would have to be different for the AFM. I would think the L76 head would be a better choice then the l92 for the 4.000-4.030 bore guys.

 

Interesting...

 

No.... the L76 has the same exact L92 heads with the same standard size valves and the block is the same, with exeption to the oiling of the dod system thats built in to the valley cover, which can be plugged if your deleting the dod feature during a non-dod cam swap like i done to my G8.

 

I thought the way that the L92/LS3 engines achieved 6.2L (or 376ci) was from an increase of bore to 4.038 with the same 3.62 stroke. So the bore is not the same, the stroke is the same.

 

No. The L76 was the 4.000 bore. The L92/LS3/LS9/LSA use a 4.065 bore. They all use the same stroke.

 

IF ANYONE IS INTERESTED!

http://cgi.ebay.com/ebaymotors/ws/eB...%3AMESELX%3AIT

 

L76 is basiclly an LS2 with L92 heads and LS3 intake
dod/afm drops out fuel and spark to 4 cylinders in dod/afm mode
doing a complete dod delete (electronically and mechanically )
will make for a good motor
and with a nice cam can make + 500 hp
doing a L76/6L80E drop into a 52 chevy fleetline
hope to make 500-525 hp on a chassis dyno when done
steve

 

^ I have the same setup that may go into either an E38 7 series or FC Rx-7. Those L76 motors can be very potent once "woken up."

 

I was given a L76 short block. I have a set of 243 heads for this. I am going to delete DOD and the VVT. I need help on picking rods, pistons, and a cam profile. I would like to get as close to 500 hp as possible if that is possible?thanks for your help

 

I'd be very interested to hear about what cam kit you are using in your setup, also rear end gears with the 6 speed auto? just picked up that same combo myself. Any recommendations would be great. Thanks

 

brought this back from the dead lol

 

The L76 is a 6.0L engine (same as LS2) with the L92 heads as stated previously. The only difference I'll add is the LS3 and L76 intake is different with different GM part numbers. The L76 intake is the same as the LS2 GTO intake with the same accessory ports, etc as the GTO LS2 intake. The LS3 intake has a different part number and my understanding is it has a different IMP connection design and different vacuum ports although I have not compared them directly. The L76 intake is a plug and play intake for the a GTO running L92/LS3 heads. Externally the LS2 vs. L76 intake are identical except the intake port shapes.

 

What all do you need for that? I plan on putting a cam in my G8 and Would like to know a little more about it before I get into it

 

To delete the AFM?

Buy LS7 lifters and an LS2 valley cover.
Then whatever cam/springs combo you want.