I mentioned to my dad that I get great info regarding my Expedition from this sight. He assumes that there isn't a sight for Grand Marquis enthusiasts... I had to agree. He and I were thinking that you guys may have some ideas about how he can squeeze some more HP out of the 4.6 in his GM. It's the "Sport" edition(?) - factory duels, 3.73 gears, floor shifter, etc. Puts out something like 235 HP... but we all know there's more to that motor than that.

Any ideas?
Thanks!

 

you can do about the same things.

K&N filter
Call up super chip and see about a program.
Bigger TB
MAF
better exahust.