If the US mobilized itself as much for WW1 as it did for WW2 what would have been the impact?

If the US entry into WW1 was bumped up a couple years to 1915 perhaps around the time of the Lusitania sinking and the US began an industrialized build-up similar to that taken on by the US from 1941 onward, how would this impacted the war as a whole?

By 1945 some 16 million Americans had been mobilized for the war. How many could have been mobilized by 1918 in this scenario?
 
The United States was just gearing up for World War 1 when it ended. What would have happened is the Central Powers would not have been buried by American manpower but by American industry. Mass produced aircraft and artillery would have had a greater effect on the war. The British and the French would have found themselves using American built weapons.
 
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