Originally Posted by NukeFor what you'll spend on going FI, you may as well trade up to a 4.6L or 5.0L. And then you'll have power PLUS additional headroom to go farther. With the 4.0, you'll top out plus you'll still need suspension upgrades to hook up and brake upgrades to stop.
Just curious; are you opposed to SC'ing or is turbo your only consideration?
Come on Rick... Don't be that guy. Sure trading up to a 4.6 or 5.0 would give you more headroom. I know personally though my car is paid off and I'd rather not have a car payment. A turbo 4.0 is capable of over 500rwtq on a stock motor...