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arpad_m, I am not arguing any (or even all the points you make up, as they are all quite valid), but what I am saying is that "Flex Fuel" is a MAJOR selling point to many. It opens a lot of different markets, both domestic and foreign and it would be absolutely INSANE from a marketing perspective to NOT add it if it was possible.
That is the whole point. That GM felt that adding it was too risky. And, yes, I have confirmed that with engineers at GM. (to cooper1965: pointing out that you have no clue who you are talking to and your arrogance shows a lack of maturity, since there are plenty of us that have been quite accomplished and have connections of our own cultivated over a lifetime of accomplishments).
Plenty of the other "variants" of the ecotec platform have and are Flex-Fuel enabled.
One of the engineering decisions for the LTG was because it was offered as a crate-engine and as such they had no clue what it might be powering, thus flex-fuel would be too risky in regards to running lean in a boosted application. Their major concern was lack of load vs too much load (ie, the vehicle it would be installed in could be too light, vs too heavy), in regards to quick-state transitions that could be anticipated (ie, racing a super-light vehicle with too many gears).
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