Ok, so here's an open ended question for you guys.
We've got several 5.4L engines on here.
My personal goals are 650 bulletproof bhp at the crank. I want to do it in two stages:
1. Bolt-on mods to get me to 450
2. All-out to get me to 650 when the warranty runs out
I'd prefer that the mods I make in the first phase not have to be replaced for the second. I'd also like to avoid any forced induction.
What are your thoughts? Can this be done? Can you give a ROM on cost?
With the 5.4 unfortunately even doing heads, cams, headers, cai, etc would probably only get you close to this HP target, and would lose some low end torque, which is the last thing you would want to do with this truck. Definitely doing headers, cai, etc would be beneficial, but would not get you even remotely close to the target HP figure, and with being in CA it would never pass emissions (legally) with a long tube. If it were my own truck, I would look at retrofitting the edelbrock e-force supercharger for the standard f150 5.4 for use with the Raptor. This would give you a great increase in TQ, as well as HP. While it may not be 50 state legal, it would have a much greater chance of passing than headers would.
No long tubes aren't out he can't use the Stainless Works cats. The long tubes aren't the problem is the cats. Magnaflows cats are 50 state legal.
While their direct replacement cats may be legal in all 50 states, their universals are not legal for use on obd-II vehicles, and unfortunately the law states that you cannot legally remove properly functioning cats, and if you do replace them due to failure they must be mounted in the exact same location as the production pieces. This would prohibit the legal use of any longtube unfortunately. Regardless of who's cat was used.
Now me personally, I would do long tubes anyways, there are always ways around these things, even in CA
