Is the U.S. "Go it alone" EPA standards restricting engine choices?

[TeamsterGrrrl]

Despite the EPA 2010 emission standards being pretty much the same as the Euro 6 standards, the engine offerings here are stuck at around 600 HP

while in the rest of the world Scania and Volvo have soared past 700 HP in a no holds barred horsepower race. Worldwide, almost every country is adopting the Euro instead of EPA standards... Are the US EPA's oddball standards stifling engine development here?

[kscarbel2]

Our government's arrogant go-it-alone stance is shameful. The entire rest of the world has adopted the Euro emissions standards.

Our country, however, chooses to follow the half baked ideas of a quack (http://www.bigmacktrucks.com/index.php?/topic/40614-your-epa-people-who-made-the-new-truck-fuel-efficiency-regs-possible/?hl=gina+mccarthy).

Our U.S.-unique automobile crash test requirements are another example. The rest of the world has adopted the standards of Euro NCAP (http://www.euroncap.com/en) to measure automotive safety performance (http://www.euroncap.com/en). What's considered safe on Germany's high-speed autobahns isn't sufficient for the US?

[Timmyb]

From what I gather, all the high hp trucks are normally in front of their own (usually automatic) gear box. As far as I know, the biggest eaton 18 speed is 2250ft/lb rated.

That's my guess anyway.

Also, the cummims isx is rated up to 1200hp in marine applications so you can definitely get the power out of them.