here yuh go- https://www.f150online.com/forums/v8...gs-can-do.html

yea motorcraft , denso, and ngk are the only plugs right now that work well with the 2v modular engines. and motorcraft wires for the 4.6.

 

I use Denso in my truck, but wouldn't hesitate to use NGK. I just put them in the ol lady's (pre-gov't) Grand Prix. All my offroad toys use NGK as well. Good ****.

 

I'd think you could do a head swap pretty cheap & "easy". With the new heads / cams and increased compression with tuning, you should get a nice gain. Between that and saving money and absolute NEED for gears by sticking with a 33" tire, you should be fairly happy with the outcome. There are plenty of cheap used FIPK's out there too.

 

Bosch Platinums are the absolute WORST plugs you can put in a Ford Triton V8. Stick with the OEM Motorcraft Platinums, they are cheap and last up to 100k.

 

Do you mean like the current 4.6 jakal or like an 01,02,03 cause i think they are improved after the 97/98 models? Whats Cheap? Your cheap and my cheap might not be the same if you kno what i mean.

 

I mean you have an NPI 4.6 whereas the 01 and current 4.6 has PI heads, cams, and intake. When you do the swap, you not only gain a lot in the flow dept., but also added compression do to not having dished pistons. Here are a few pics I swiped off google image: (these are shots of the PI intake gasket sitting on an NPI head)





Watch the classifieds here at the top of the page. I've seen MANY cheap intakes come and go. I made my own using a WMS velocity tube. There is also a LOT of material to be removed from the TB, elbow, and upper / lower intake manifolds. Since you're talking about 35" wheels / tires, researching gears, and talking about transforming a 4.6 into a 5.4...I'm assuming you're ready to drop reasonable cash on worthwhile mods of the "best bang for the buck" variety.

Here's a shot of my intake manifold for comparison: (I did a little massaging...mostly around the injector shroud.)

 

Good photos Jackal.
I'm not sure what the actual hp and tq differences are between the npi and pi heads/cams but according a flow chart I have, the PIs flow about 18% better in the mid range (.350") but are fairly equal at the bottom and top of the lift curve.
If I were to want to do an npi upgrade, I would send the npi heads to a good shop for porting and polishing and add aftermarket cams. Stock PI heads and cams would not be worth the effort,imo. I'm not crazy about the compression increase though.

That is still pushing into the $ 2,000 range. I'm sure you could do a 5.4 swap for that kind of money?

 

Here is a quote from Built54 regarding an NPI to PI 5.4 head swap:

"with comp cams #102500, I gained 100hp from 3k up"

When I thought I had NPI heads I looked into porting them vs. a head swap, and determined much cheaper / easier to do the head swap. Then I lucked out and didn't have to do either. Not that you have to, but most port jobs also remove the swirl dams which I don't understand at all. You have to add a BUNCH of timing to get back to where you were before removal of said swirl dams. I called Fox Lake about this when I pulled my heads and they didn't offer any explanation except that all of their heads have deleted swirl dams. I'd think it not beneficial unless using forced induction...???

 

Not the swirl dam argument again! I'm not going there. Look at the Npi SVO heads in my gallery, no swirl dam out of the box....

Built54's 100 hp increase must be with boost. I run those cams with lower boost on my 4.6, and 100 hp above 3k rpm is just incredible.

All of this is academic. Imo, the OP would do better with a low mileage 5.4 swap.

 

There it is again ? The 5four ? Huh, -sounds easy enough to me.

Find a 98 5four Block - non PI.

Now find a 99 intake and heads. Put her togeher, get it dynowed, ~ I bet a tuned 3 valve won't catch yuh, not with the 98/99 5four combo. - But she needs to breath, -real well.



Then start socking it away for stage 2

 

Is that essentially a high compression PI 5.4?

 

Where do the numbers peak now ONELOWF? What RPM? Curious

 

Yea lol.

It' been awhile Jackal, hows it running since you last did all the work. Bet it's strong

Head gaskets holding?

 

looks like fun!

 

All good man, still like new again. Just waiting for the slave cylinder to go TU again, forcing me to have to remove the pass. side header.

Still looking into the full body Line-X...prob. pull the trigger this tax season. I haven't washed / waxed in a LONG time to help justify it. LOL.

What did you end up doing with your EGR setup?