The 55 shot will last 8-10 , 10 sec runs, then the pressure drops and you get less nos per spray, then very little per spray even tho you have 4-5 lbs left, remember most tnks are filled from 1/2 3/4 empty. Welding shops will fill the tanks but it's a different crappy grade, go to a performance shop . Get an AF guage!!!!!! it helps alot. 
I have lots of nos/zex info on my site to <img src=/images/forums/snitz/smile.gif width=15 height=15 border=0>
<hr width=60% noshade size=1 align=left>http://webhome.idirect.com/~trini
<b>I AM A TIBURON OWNER WANNABE!!!</b>
I have lots of nos/zex info on my site to <img src=/images/forums/snitz/smile.gif width=15 height=15 border=0><hr width=60% noshade size=1 align=left>http://webhome.idirect.com/~trini
<b>I AM A TIBURON OWNER WANNABE!!!</b>
