im taking into consideration about how much energy is required to make hydrogen from water. but its just i need to know how to controle the guzzling of the gas if it ever sinces leannes.

its a 93 nissan d21 small 4 cylinder pickup. i plan on putting an extra batery and alternater for power production. now i just need to controle the gas guzzling. would taking the oxysenser off make a difference?