I have a preditor,(for now) and if i remember right, i can log data and download on my comp to read it,right? if so, have any of you guys been able to pull any fuel related info off your tuners?? what kinda numbers are we looking for?? Im at a breaking point, I want to add a lift pump to help push the shit fuel in the winter and also i know it will help the power a bit, BUT i have this problem,like most of us, i dont know when to stop.... (see last truck in sig,lol) Anyway, i'm more or less curious where a guy has to be for HP before the signifigance of a lift pump comes into play and what usefull info can be pulled of the tuners.

I'm not sure if you can log your fuel rail pressure with the diablo or not, I don't have one. But if you do find out how you'll be able to tell if you need one when you compair the desired fuel rail pressure to actual fuel rail pressure. If it drops off slowly in the high end but the desired stays at one point then a lift pump would help, If it drops off sharply when it gets to its peak then your poping your fuel pressure relief valve and a shim would help with that.

I'm switching to efi live soon as it shows up, im sure you can check desired press to actual. i was just curious on what its at now, i do have the shim kit and high flow rail fitting in, btw.

With the right tune you shouldn't have any troubles holding rail pressure with a good lift pump and the shim. Before I added both of those I'd get a low fuel rail pressure code every race, now I don't get any codes. If you have a friend with a tech 2 he can watch your FRP for ya and tell you what its at vs what its asking for.

maybe this would help?

http://www.pacificp.com/store/index.php?main_page=product_info&cPath=2_24&products_id=197&zenid=e0753894445fb529dc9dea8c0b277882

the predator can log it if you are running the versions after 2.02. Otherwise, you can just monitor it with 2.02.