Quote:
Originally Posted by GretchenGotGrowl
But the LS2 and LS4 were performance engines. The LS4 5.3L came after the LS2 6.0L. Take the LS4, which had DOD, and give it DI/VVT and you may be able to get more HP and greater MPG without having to use DOD/AFM. Those same people buying GXPs, Impala SSs and Monte Carlos SSs back in the mid 2000s would probably buy something with those characteristics again.
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You’re talking about a few different things here.
The LS1, LS2, LS3 have been the base performance engines from GM since 1997. As you have seen the displacement has gone up from 5.7L to 6.0L to 6.2L during the Gen IV LS engine run. This has been done to meet higher and higher performance objectives. With no real penalty in external size and weight from an LS1 to LS3 the added HP and torque from larger displacement has allowed cars like Corvette to remain competitive in the marketplace. If they can maintain the performance increases from the larger displacement and still hit fuel economy targets for Gen V with the new technology there is no reason to go lower displacement.
As for the LS4 powered FWD W cars they will probably not be duplicated again. A combination of CAFE and the advent of modern and more powerful direct injected 4cy and V6's with forced induction options will make the FWD V8 obsolete.