Here's the original set up and the battery rack..
Using both front pumps and 24 volts, I could only get abou 4" max. Which I thought pretty much sucked, since I knew I could get 8" with just one of my older pumps using 24 volts. (4" a battery)
Once I plugged in another pump, which was not really a hopping pump, I got about 22" with 5 batteries. (4.5" a battery)
I then made a hopping pump
with used parts and a new Adex, that's when I got 28" (5.6" a battery) The goal is 7.5" a battery
I still needed to:Tie the batteries down as they were flying all over the place, and
I needed to fix the rear to avoid hitting the bumper. At that time the test pump I had in there had an external leaking dump valve.
I also needed to add chains or shocks as I had none.
Plus, I really need to pratice hitting the switch,
So all in all, I think it did pretty good for 5 batteries at 28"