Quote:
Originally Posted by racprops
I suspect they have done it but are not allowed to use/sell it.
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Having worked for one of the big 3, I can tell you that's not true. Even if you pushed it to mean that it violated emission laws so they couldn't use it. You can certainly do better with fuel mileage by ignoring all emission conditions. You can do even better if you're willing to drastically sacrifice driveability (like 0-60 in the 1 minute range). It all depends on what you want.
Maybe if you changed the statement to say "... but won't build it because it wouldn't be driveable or wouldn't pass emissions laws."
Even with that said, I'll echo the question: What are the limits if emissions be damned?
I like air, so I wouldn't support it on a large scale, but I sure would like to know.