ibnudie2
+1y
i had 2 450 bumps before on 3 5 allon tanks and i could never get them over 125 psi... I bought a new altinator bigger amp and i still have same problem... i have burned up 3 viair 450s. I have a yellow top battary.. pumps are at the very rear of the extra cab truck and i am running a 8 gauge wire to each running to a 40 amp relays then to a battary... When my truck is in idle the pumps sound like they are starving for power then when i step on the gas they sound like they are at full speed. i need a better way of wiring it or what? i want to get 200 psi out of these 2 5 gallons.....