I should explain the 10-25HP gain is not Drag Strip or Dyno HP gains. But is in fact real world, as you drive every day, extra HP when you want it. Maybe at most 5HP on a dyno.
All electrical, maintenance-free and hardly noticable when in operation, except for the power increase. At night when electrical use is highest the gains are most noticable.
I have a VAK package you just wire in and connect to a vacuum line. This will cut power to the alternator, VAPs, and A/C when in operation. It could also be used to both increase line pressure in the ATX and boost the 12v system to 14v during the short term operation of the VAK. Or anything electrically controlled you can think of. How about dis-engagine the TC lockup too?
I have a small 12V deep discharge gel cell battery (20 LBS) and the system worked flawlessly at the convention auto-xing at Summit Point and at the drags where I ran the cooling fan in between runs with the engine off. The small battery delivers more power than a OEM type battery twice it's size.
Currently I am testing the 14V boost mod but have been using the VAK for the last 3 months with no problems.