G8/l76
#22
Here's what's different between the L76 and the LS2:
1. L76 has AFM - Active Fuel Mangement (formerly DOD - Displacement on Demand)
- shutting off fuel to 4 cylinders under light load conditions for better fuel economy and reduced emissions.
2. L76 has Variable Cam-Phasing (aka VVT)
- the ability to change cam timing by metering the oil flow to the cam phaser, effectively physically advancing or retarding camshaft timing, also for better fuel economy and reduced emissions.
3. L76 Bore: 3.988-inch, LS2 Bore: 4.000-inch
4. The L76 is tuned for 362hp on 87 octane gasoline.
- A tuner's dream! A tune tweaking spark and fuel for 93 octane should pick up 20-25hp easily.
5. LS2 heads are based on the LS1 design, but L76 heads are based on the better-flowing L92 design. L76 heads are basically L92 heads for use with a 3.988-inch bore (vs the 4.065-inch bore of the LS3 and L92).
The L98 used in the Holden Commodre in Australia is identical to the L76, except it doesn't have Active Fuel Management or Variable Cam-Phasing.
That's all I know so far.
And for a GXP version, I would think an LS3 might be there.
LS7 won't be in production anymore by then.
1. L76 has AFM - Active Fuel Mangement (formerly DOD - Displacement on Demand)
- shutting off fuel to 4 cylinders under light load conditions for better fuel economy and reduced emissions.
2. L76 has Variable Cam-Phasing (aka VVT)
- the ability to change cam timing by metering the oil flow to the cam phaser, effectively physically advancing or retarding camshaft timing, also for better fuel economy and reduced emissions.
3. L76 Bore: 3.988-inch, LS2 Bore: 4.000-inch
4. The L76 is tuned for 362hp on 87 octane gasoline.
- A tuner's dream! A tune tweaking spark and fuel for 93 octane should pick up 20-25hp easily.
5. LS2 heads are based on the LS1 design, but L76 heads are based on the better-flowing L92 design. L76 heads are basically L92 heads for use with a 3.988-inch bore (vs the 4.065-inch bore of the LS3 and L92).
The L98 used in the Holden Commodre in Australia is identical to the L76, except it doesn't have Active Fuel Management or Variable Cam-Phasing.
That's all I know so far.
And for a GXP version, I would think an LS3 might be there.
LS7 won't be in production anymore by then.
#23
Will the LS3 have AFM at all?
#24