Originally Posted by
james manutes
Here's my 2 cents . Grizzly 1.5 , 2 , and 3 HP are all upgrades from the HF that is so common . All have a 12 3/4" impeller , with the 1.5 HP model is 10 mm shorter . I'm on my third shop built cyclone , and all three have been pretty good . We should decide I think what is "pretty good" . I've used 6" PVC on all 3 collectors , and got 775 to 875 CFM at the end 25' branches . I'm thrilled with it , but it's not up to Bill Pence numbers . Only other point is the Dust Deputy , Thien baffle , or trash can sep. add resistance , choose wisely .