Well, I can add something here (short of additional dyno testing). I have just installed the Sun (Hyperground) kit on 2 family cars -- my 1992 Infiniti G20 and 1998 Subaru Outback, both manual T. Both stock except for air filters and ECU from JWT on the G20.
On the G20 the added boost IS noticeable. It's mostly in the lower ranges, where torque is weak on this series. Tootling along in 3rd or 4th in town is also smoother. Car also starts RIGHT AWAY and the idle no longer drops when lights are used. Mileage -- don't know yet, will report that later.
The Subaru in general seems MUCH smoother, especially again in town use in 3rd and 4th -- less bucking when turning corners, etc. I am less sure about the feeling of additional power. Again, lights no longer reduce idle.
The wiring kit is obviously well made and the installation is easy. I found the recommended "S" kit fine for the small G20 engine compartment. I've recommended to Sun that they sell the slightly larger (length) "M" kit pieces to the Legacy/Outback owners -- I had a hard time making everything reach with the smaller set, using the best grounding points.
More on mileage later.
On the G20 the added boost IS noticeable. It's mostly in the lower ranges, where torque is weak on this series. Tootling along in 3rd or 4th in town is also smoother. Car also starts RIGHT AWAY and the idle no longer drops when lights are used. Mileage -- don't know yet, will report that later.
The Subaru in general seems MUCH smoother, especially again in town use in 3rd and 4th -- less bucking when turning corners, etc. I am less sure about the feeling of additional power. Again, lights no longer reduce idle.
The wiring kit is obviously well made and the installation is easy. I found the recommended "S" kit fine for the small G20 engine compartment. I've recommended to Sun that they sell the slightly larger (length) "M" kit pieces to the Legacy/Outback owners -- I had a hard time making everything reach with the smaller set, using the best grounding points.
More on mileage later.
