will need some more fuel?

[elmo0244]

will i need any fuel mod's if i add a 2lb lower?mod's and hp in my sig. thanks

 

[CobraBob]

How's your A/F right now up through 6600 rpms? Whether or not you will need more fuel mods depends what you see on the dyno. I would guess you will, but I've heard of some getting 520 or so with the stock fuel system. If it were me (knowing I was at 500rwhp) I would buy Mjchip's MafXtender and the BAP (or Focus fuel pumps). You should be okay with the injectors but you're probably approaching the need to upgrade them as well. I you don't want to do the upgrades unless absolutely necessary then do the 2lb. lower and get to the dyno to check your tune. Then upgrade according to what you, or your tuner, see.