To give you an idea i am at 4.5 in yhe rear (block not spring yet) and 3.5 up frony with 35x12.5 tires and i have room to spare and thays just a leveling kit yp front but i will be switchinf to 4" springs to maintain my height after my diesel swap. You msy be sble to get awsy with thst since your sticking with the 5.4l.

 

It looks good, but I am going with that setup to get more clearance and flex for at work. My exhaust is a side exit in front of the rear tire because I tore my old pipes up when I kept dragging the rear bumper. So I actually need the extra clearance. The extra flex will be good because there were a few times I had a tire just hanging in the air.

 

thought you meant no fuel injection so carb set up with ram air, gotcha no forced induction.
wasnt commenting on your income just was getting the idea your trending toward an economical way to more torque down low or grunt out of the 5.4.

you can do this 5.4 build and make it rock solid dependable and achieve your goals. and turn more torque than the 6.2/6.6 or 427 winsdor!

ive got some info for you on the five four ill try to put it all together for you in another reply...

just a note:
i ran reg cab 4x4 w/ an 2v v10 and 4.88's on 33's it pulled and accelerated as well as any of my 4 barrel 460 truck builds with 4.10's on 35's. 500+ down low ftlbs.

 

Ok I was wondering why you kept trying to push the forced induction route. Sorry for the misunderstanding. I have been doing a good bit of my reading on the Mustang sites and fi usually is referring to forced induction there. No my deal was that I wanted to add some top end since I had plenty of torque down low but it seems to be lacking when I get on it 3000+ rpms. I am trying not to kill my bottom end while adding a nice boost up top. From what I have seen this build will do just that. Should be a reliable setup that is good on road and off, and be fun when I want to play.

 

from what ive seen it wont.

those heads were designed for the four six even though the bolt up to the five four, thats why you dont see any dyno sheets on the TFS site they give numbers for the small motor at like 390hp 375tq max 10 to 1

that stock or hps intake will choke off any gains you might see from that head on a five four

ive seen a mmr build that shows it, still lookin for it...
they couldnt even get 400 hp or torque and that was a forged mmr 12 to 1 short block with the hps and a bbk throttle body and tuner!!!
they swapped out for the eldelbrock victor and accufab to get over 400 mark
you best bet is the navigator 4v build or the latest 3 valve, theyre pretty close.
its basically 4cam 4valve up against single cam VVT 3valve
they will make those numbers with some good tq headers and a tune
and theyll make over 350 tq from 2000 to over 6000 and peake over 425hp and tq all day long! stock heads and cams on a forged short block say 10 to 1!

your power will only be limited by the compression or octane you plan to run in the short block

these motors can be tuned to run on pump as high as 11.5 to 1 maybe more depending on your local fuel

i know the 4v nav motor comes with the same quality steel crank used in the blown gt motor and is good for 1500 ponies blown and can be reliable offset ground NA , both to 8500 rpm so if you ever want to add the fi your good wth just rods and pistons, stock heads.....

anywho a stock navi/3v has conservative numbers from ford that could easily get over 400 numbersd with just headers, air and tune and a big fat flat torque curve to go with it.
last but not least these motors were DESIGNED to be 4v from the git go not 2v, thats your typical ford penny pinchers backing off the technology

see mustangs and fords on mustang360 article on 4v 5.4 manifold comparison and you'll see the forged short block your thinking of building really pull with navi heads and intake, stock stuff...

 

Equipped with the Navigator intake, the 5.4L produced 426 hp and 411 lb-ft of torque with a torque curve that exceeded 375 lb-ft from 3,000 rpm to 5,900 rpm.

Read more: 5.4L Modular Motor Intake Manifold Test - Muscle Mustangs & Fast Fords Magazine


sean hyland cams on this one with bigger output

also i do know where you can still get new ford supercar heads for 3 grand complete pair and run the navi intake for tq, as opposed to the tfs head and hps intake or other

if your gonna build a forged short block...

 

Ok well you have my interest and I will certainly be looking into it. I don't understand how they managed such a torque and horsepower increase from an engine with low compression and pretty much just cam upgrades. I am not after maximum power but rather as much as I can get while keeping a good torque curve.

 

Nobody has experience with boosting a 5.4 with factory compression? Or upping the compression?

 

That built motor from the article has a pretty impressive dyno chart and should be absolutely bulletproof in a naturally aspirated setup. Certainly a serious upgrade from a bone stock 5.4. If I hadn't already pulled the trigger on a new truck with the 6.2, I would seriously consider something like that setup with the Navigator heads and intake.

 

Well I sent a message to a guy over at SHM and was told the 4v into a super duty with a 2v engine is a electronics nightmare so just a heads up to anyone thinking of trying it. He did not go into details though as to why. I will be glad when I can finally get this thing built as I have been reading and researching for a couple of years now. The power output should be fun and reliable then a 75 or 100 shot for when I want to jack with someone at work.

 

Does anyone know what the issues are with swapping a 4v navigator engine in a super duty as far as electronics go. I am having a hard time finding info.

 

I dont see the problem with it, its still a 5.4 but the heads are different and that has nothing to do with a tuner making adjustments. Maybe the 4valve has different mass wiring that makes it hard to get right?

galaxy S4 using IB AutoGroup

 

Yes im still researching. I really like the combustion chamber design of the 4v.

 

you might wnt to loo at FAST EFI and similar.
check the last PHR engine masters competition with 5.4 mod motors taking 123.
also maybe look into welding up an low profile log tube tuned intake along with you headers.

 

are the 5.4s sparkplugs on the top on a superduty from 99? i have one but havent looked at the engine much since its broken.