C P
10-23-2007, 09:21 AM
I don't know if this is news or not, but I found this interesting when reading the GM Media release on the G8 L76 engine:
"Intake Manifold From LS3 Corvette Application
Packaging the 6.0L (L76) V8 under the lower hoodline of the G8 GT passenger car required a lower intake system than is used by the engine in truck applications, and so the thoroughly developed intake from the current LS3 6.2L V8, new in the Corvette for 2008, is used with the 6.0L (L76)."
I don't think there is that much difference between the "LS3" and "L76" intakes, but I had not read this before.
Another interesting bit of information was the following description of the heads:
"High-Flow Cylinder Heads
The Gen IV 6.0L (L76) is fitted with high-flow cylinder heads, based on those developed for the high-performance LS2 and LS6 car V8s. These heads have offset rockers, like those in the LS7. They also have larger valves than the Vortec 6.0L V8 heads used in truck applications, and increase airflow in and out of the engine for higher horsepower. Yet the 6.0L (L76) heads maintain a compression ratio and calibrations that allow these engines to operate on regular gas."
This would seem to indicate that the heads are indeed the L92's given that the L92 heads are "based on those developed for the high-performance LS2 and LS6 car V8s". Again, not sure if this is news or not.
CP
"Intake Manifold From LS3 Corvette Application
Packaging the 6.0L (L76) V8 under the lower hoodline of the G8 GT passenger car required a lower intake system than is used by the engine in truck applications, and so the thoroughly developed intake from the current LS3 6.2L V8, new in the Corvette for 2008, is used with the 6.0L (L76)."
I don't think there is that much difference between the "LS3" and "L76" intakes, but I had not read this before.
Another interesting bit of information was the following description of the heads:
"High-Flow Cylinder Heads
The Gen IV 6.0L (L76) is fitted with high-flow cylinder heads, based on those developed for the high-performance LS2 and LS6 car V8s. These heads have offset rockers, like those in the LS7. They also have larger valves than the Vortec 6.0L V8 heads used in truck applications, and increase airflow in and out of the engine for higher horsepower. Yet the 6.0L (L76) heads maintain a compression ratio and calibrations that allow these engines to operate on regular gas."
This would seem to indicate that the heads are indeed the L92's given that the L92 heads are "based on those developed for the high-performance LS2 and LS6 car V8s". Again, not sure if this is news or not.
CP