The HP runs at 12" hg. I know this because a guy who was busting belts was told it was cause he was setting his lift over 12. Prochem believes that it is the cfm that removes water,while others believe it is lift hg. I'd be darn sure which side of the debate I believed before spending $30K.
I thought the Everest HP was the stock tri-flow T408 (500 cfm) blower with the HIGH PRESSURE heat exchanger and pump?
And the 650 was just a larger blower option of the low pressure version (I think there is a 650 HP), to be specific it's the same #4 blower with 10" wide lobes instead of 8" wide lobes, but same 4" gear and technically still on a #4 blower frame, with the same 3" intake an exhaust?
I have the everest and the APEX and I paid under $16,500 for each of them with about 900 and 1100 hrs.
The Everest is great and you can legitimately dual wand and I have my apex spinning at about 13.5-15 hgs and I have never busted a belt. I use to see a difference but after talking about some of the issues I was having with the APEX it was operator error. I love the APEX but if I had a choice I would go Everest. Also roughly 2 gallons an hour vs 1 gallon an hr of fuel.