Gem, I wasn't trying to get into the entire debate between the two SC technologies. I was trying to apply the current (or near current) options this gentleman is concerned with. He's looking for 250whp which would fit perfectly in the efficiency range of either kit.
The difference here is, how the air is delivered. A twin screw has torque everywhere because of it's ability to deliver positive pressure down low instead of at the end of the rev range... dare I say
similar to a turbo's torque delivery. (Please read the bolded word before the flame war haha).
I've seen the dynos for the Vortech unit, and overlayed it's torque curve with my own torque curve on e85/I/E.
My point to EMPower, was that if he had access to an 86 with an e85 tune, then he could essentially get an idea of how the Vortech unit would "feel" below 5200 RPM. Although 178ft lbs isn't that much of a difference from 160, but it would surely pull a bit better after 5200. If EMPower is looking for a bit more daily driven torque (read: 2500-5000), then a twin screw would probably suit him just fine.
