New Project Diesel Truck Hyundai HD-65 no gains

Hi guys,

I have installed 3 dry cell systems to 3 of my trucks. They are Hyundai HD-65 4Cilinders in-line 3.5L

I run an 18 plates dry well with -nnnnnnnn+nnnnnnnn- for the 24v truck. The systems are running smothly at 9-14 amps. I set up one at 9 ams, one at 11 amps and one at 14 amps. with production of 2lpm-3lpm of HHO with still no gains for the first 3 weeks.

Since i have 3 different trucks i will lower the amps to 6amps and increase the other to 18 amps to see how they behave.

I believe there are no electronic i can manipulate in this engine, i was thinkign of increasing the diameter of the fuel return line. What do you guys think?