Originally Posted by OldScoolCamaro
...but if one is a student of GM history, one would know they do not follow that approach you mentioned. They build engines, designate them for platforms/models, that are certified. Certification is a lenghty and time consuming process...thats' what GM does...guarantees their engines within a reasonable degree of cetainty. They do not deviate from that certification, until they come up with a new engine platform. In past history, these powerplants have been used for a predetermined service life. There is no yearly change, or upgrade, and this doctrine has been in place been. There is no reason they would change it. We have not seen what GM has in store with the DI Gen 5 motors. Cadillac and Corvette will unveil the next lineage, from there we shall follow. Stay tuned, and read on beyond C5 for info.
Not disagreeing with you on that...sure you're probably right...was just thinking of a comparison like the 60's...you could get a 350, or a 396 or whatever, all in the same year, all with different variations...Probably never see that again, but why not, for example, LT1 (standard)...LS3, LT4,or LS7 available as an option...
...These engines already exist, are "certified" or whatever...just sayin'...