Stop being so pushy and tell everyone they MUST try it. This is, by all standards "snake oil" and your fuel savings may be a result of careful driving @ 5%.
If you want real fuel savings, go get your car turbo charged. Your NA car's ecu is not programmed for boost and NA maps on boost do save fuel - as long as you don't start driving like your hair's on fire.. We're talking about 10-20% savings here. Too bad Singapore's authorities frown on the mod
If you want a real one farad volt-stab, you can get one from audio shops. They use these things to prevent amps from losing power due to hard bass thumps. However be aware that large capacitors are prone to leakage and your battery may wear out prematurely.
If you insist on DIYing one, make sure you have large gauge wires. Cat5E strands won't cut it (pardon the pun). Forget the circuit board and solder the caps directly to the wires. Careful to prevent them from shorting and starting a fire. Use red and black wires to prevent user fault when connecting them up, and use large lugs. IMO you've got too many capacitors there and wiring is going to be a nightmare. Use a drop-down resistor to verify your circuit is working, and use an external blade type fuse to protect your investment (the car).
I have a similiar DIY setup in my car @ total 200,000uF that's 0.2F. Did it 2 years back. It doesn't work, trust me and i've yet to see any fuel savings. I haven't taken it out only because i'm too frikking lazy
my 2 cents man.
