Hello everybody. Subi_man was kind enough to lend his Powerbox to me. So i did some testing. Here are the Results.
If anybody would like to know?
The times where recorded in the exact same spot on the road each pass, 80-120km/h test was done in 4th gear and the 100-140km/h test done in 5th ( on course it was not on Public roads officer). Each Fuel run was over the same 20Kms, with Cruse control set to 118Km/h and A/C on. Weather was 28 degrees, Fine and sunny.( Ok, Im on days off and thought I was on Mythbusters for the day)
All times in Seconds.
All Speeds in Km/h.
Without Power box.
0-100 = 17.74
80-120 = 12.80
100-140 = 19.90
Average Fuel = 13.0 L/100kms
PowerBox set on 5.
0-100 = 15.19
80-120 = 11.39
100-140 = 17.28
Average Fuel = 11.4 L/100kms
PowerBox set on 6.
80-120 = 11.29
100-140 = 15.51
PowerBox set on 7.
80-120 = 11.13
100-140 = 15.54
Powerbox set on 9.
80-120 = 10.22
100-140 = 15.82
Powerbox set on F. ( That is the highest setting)
0-100 = 12.92 (This was in 4x4, to stop wheel spin)
80-120 = 9.41
100-140 = 14.64
Average Fuel = 10.5 L/100kms
On this setting, black smoke was clear to see out the exhaust at high RPM but i could not get the engine light to come on, even after floging the shit out of it for a hour or so??? ( does anyone else do this)
So there you go. I am convinced it will save fuel if you drive Sensible and there is lots of extra power is there if you need it.
Once again. Thanks Subi_man, and Kevo78 for sitting beside me, operating the stopwatch.