takin 180psi get truck all the way up???

i got a 1990 nissan hb, with half inch bags all the way around. my front end wont even lift off the ground till 120 psi, then it wont go all the way up till it reaches 180 i was wondering if it was a common problem or if it is just me also the bags are rubbin on my ball joint. i have just ordered some slam bags for the front will that help or what???

My dually doesn't even need that...what bag are you using? And is the bag completely compressed when it's lowered?

my fullsize untucks 22s at 120psi......

i have conitech bags in the front and yeah they're fully compressed im sure it will hope the back off the ground at 160 but the front wont be half way up and another question is why when i hit my back bags up i lose some pressure out of my fron bags

u probably have a kink in ur line i had that problem

Oh yeah Cris...I untuck 16's at 90.

Edited: 3/8/2006 7:03:47 PM by bdroppeddak

when i had my 720, it would max out a firestone bag at 145 psi, kinda the same truck and bag....

CHECK VALVES MY FRIEND, YOU NEED CHECK VALVES! I ALSO HAVE THE SAME PROBLEM WITH PSI AND MY FRONT BAGS, IVE BEEN TRYIN TO FIGURE IT OUT FOREVER, BUT IM PRETTY SURE, WITH BETTER CUPS ILL BE OK

Burnsy, give some more info on what you have done.

yo lose psi frome the front. cause the system will even out the press. if you have the frnt up with 120 and the back down. and 200 in the tank it will take it from the frnt.you can seprate the frnt and back with 2 tanks and it will not do that.