shindaiwa put up info on their web site for the eb8510. http://www.shindaiwa.com/products/blowers/eb8510.html 762 cfm at the end of the tube. Up to 224mph with the optional tube end, however that must drop cfm. The difference between either a shin. eb630 and a redmax 7001 to the redmax 8000 is 10% more air. Then the new eb8510 is blowing out an additional 10% to the redmax 8000. The stihl br600 is rated at 712 cfm and the eb8510 is 7% more powerful than that in cfms. Has anyone had the chance to test one of these or know what price they are?