Keyser Soze

I have a 2001 f150 4.6, Is it possible to swap 5.4 cams into the 4.6 heads?. From what i have heard they have more lift and duration. Is this possible?, and how much power might be gained?. ( I live in california and have to deal with smog checks every two or three years) Thanks for any information you can provide. Larry

 

Speeder, I too live in California, but I have yet to receive a notice for smog inspection. I was told by a friend who knows everthing about everything that '95 and newer vehicles are exempt from inspections since they run much cleaner than thier predessesors. As far as changing cams since you have the heads off anyway to check piston-valve clearance, why not go to 5.4 heads which probably have larger valves? also with the swap to 5.4 heads will the 4.6 coil packs still work? And what about exaust and intake manifolds?

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'97 F150 4.6L XL WHITE,FLEETSIDE R/C L/B, LEER SHELL W/FISHING POLE RACK, BED MAT,LIMMITED SLIP,245/75/16 DESERT DOGS ON POLISHED ALUM, WHEELS.
AIRAID, 3" CAT BACK OUT THE SIDE w/MAGNAFLOW MUFFER

 

Hey guys the 4.6 and the 5.4 have the same exact heads, swapping them would acomplish nothing unless you use the new PI heads... Intake and exhaust manifolds will fit between the two because they are the same!....

 

Hi WhiteFlight

Everything is the same except the exhaust manifolds, According to Neal you must use headers with the 5.4 heads because the EGR is in a diferent place and the stock exhaust manifold wont clear it.

 

HI... GUYS : I'll go through this one more time so you will understand, because I am seeing a lot of mis-information on this subject. If you have "97" to "2000" (not sure about the new "2001 4.6's) truck 4.6, and you install a set of "99" and newer 5.4 "PI" heads, you will gain H.P. The "99" and up MUSTANG 4.6 2-VALVE got "PI" heads as well. That's why it jumped to 260H.P. You won't get the same H.P increase because FORD's played with the cam's profile and used a redesigned intake manifold on the MUSTANG. The "PI" 4.6 heads on the MUSTANG and the "99" 5.4 "PI" to "2000" are "PHYSICALLY" the same exact heads. They do have different PART #'s, but I asked some of the SVT engineer's at the DETROIT AUTORAMA and that is what I was told. The "99" 5.4 got 25H.P extra over the "97-98"5.4's, so I figure you would gain at least 20H.P by swapping heads. As for what headers or exhaust manifolds to use on a 4.6 with 5.4 heads, use the one's designed for the 4.6 because the 5.4's EGR tube is located in a different location than the 4.6. The 5.4 "PI" heads are IDENTICAL, outside cosmetically to the PLAIN 4.6 heads. It's the internalls that got changed. BIGGER exhaust and intake valves, Better contoured intake and exhaust runners for better air flow. The "99" and up 5.4's also got more cam lift over the previous years. Hope this clears some things up.

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NEAL " THE H.P FREAK" E-MAIL :nnewman@sympatico.ca
'99' F-150 XLT SPORT, oxford white, reg cab shortbox stepside,5.4, auto, 4.10L.S, captain's chairs, bedliner, GTS carbon fiber headlight covers, ***** CEPECK clear halogen driving lights, GTS slotted tailight covers (painted oxford white), fiberglass smooth wiper cowl (painted OXFORD WHITE), FORD locking lug nuts, tinted windows,true duel exhaust with 2.5 inch mandrel bent pipes and FLOWMASTER 3 chamber mufflers with 3' tailpipes exiting before the rear wheel like the LIGHTNING, HELLWIG rear stabalizer bar, 3 AUTOMETER guage pods, filled with tranny temp, engine temp, and oil preasure AUTOMETER "PHANTOM" guages,custom fabricated air intake trac and huge K/N filter, TPS mod, BELLTECH 2-inch rear drop, custom programed SUPERCHIP, BAUMANN ENGINEERING shift kit (on stage 5 setting)BYPASS CLUTCH CONTROL VALVE/PREASURE REGULATOR VALVE, ASP POWER PULLEYS, custom tig welded and ported JBA "JET BLACK coated headers, twin DERALE 16 INCH ELECTRIC FANS, PERMA COOL 14"/10" tranny cooler with 10" electric fan, custom ported (STOCK) throttle body, custom digital air intake temp sensor, custom ported TB intake elbow, relocated ATS.


FUTURE MODS : FORD SVT 24LB INJECTORS, CUSTOM SUPERCHIP FLIP-CHIP, BBK 75MM THROTTLE BODY, 80MM PRO-M MASS AIR METER, AADI F1 RAM AIR HOOD WITH CUSTOM FABRICATED RAM AIR SET-UP, CAL-TRAC TRACTION BARS, EXTRUDE HONED INTAKE MANIFOLD, SHM CUSTOM FUEL RAILS, SHM "RACE WATER PUMP, 90/10 FRONT CE SHOCKS, 70/30 REAR CE SHOCKS, BELL TECH 2/4 DROP, EXPEDITION CENTER CONSOLE, HARLEY DAVISON F-150, LOWER FRONT VALANCE (painted oxford white) and a KENNE BELL BLOWZILLA SUPERCHARGER.

ESTIMATED H.P TO DATE : 330H.P / 425ft/lbs of torque.

CURRENT PERFORMANCE : 1/4 MILE - 14.53E.T * MPH - 93.00 * 0-60MPH - 5.8 * 1/8 MILE - 9.2 * 60 FT - 2.0

OTHER TOYS : "83" PRO STREET FORD RANGER : 351-w stroked to 408c.i 625H.P (natural), 875H.P with 250H.P "BIG SHOT" N.O.S kit, tubbed (crome moly tubing), 12 point chrome moly roll cage, 4-link with coil overs, MUSTANG II front suspension, c-4 tranny (race prepped), 4000rpm stall converter(8 INCH), 3" chrome moly driveshaft,AUTOMETER guages, 15.50 MICKEY THOMPSON rear tires, 4" M/T front tires, CENTERLINE CON-VO PRO rims, fiberglass hood - bumper - prostock hood scoop, wishbone trac-link, two chrome moly driveshaft loops, 16 gallon RCI fuel cell,etc

[This message has been edited by Neal (edited 03-10-2001).]

 

How much would these 99 5.4Pi heads cost? How much would a shop charge to install these, and is that the only thing to change or is there more involved in this swap????

 

ad4x4ofrd,

Each head costs about $400.00 +- and shipping charges. They come complete assembled with valves and cam.
Part#1 reference; -6049-JA improved HP left cylinder head with valves & cam
List Price:$540.90 Your Price:$405.68 Is it in stock? No(4-5 days
to ship)

Part#2 reference; -6049- HA improved HP right cylinder head with valves &
cam
List Price:$531.62 Your Price:$398.72 Is it in stock? No(4-5 days
to ship)

ADDITIONAL NOTES: Plus actual shipping.

Check out http://www.fordpartsonline.com

They will require the use of a head install kit and gaskets. You and not re-use any of the old head bolts or gaskets. The install takes anywhere from 16 to 25 hours. Depending on your skill. You may have to remove the front engine cover to access the timing chains. Weather the engine runs fine with the OEM PCM is yet to be determined. Most likely a new program has to be written to accomodate the increased flow.

Regards

Jean Marc Chartier

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00 F-150 XLT SC Flairside 4x4 4.6 w/5spd 3.55LSD
Warn XD9000i, skid plates, Draw tite class III,
Rancho RSX Reflex shocks, MAC 8.8 Axle Girdle
BFG 285/75 R16 MTs,
Borla Cat Back, Headman Headers,
Custom air intake system with modified
air box, Ported Throttle body,
Shortened MAF sensor tower,
K&N air filter,
Superchips

 

Hi JMC

I know you have to use new gaskets when you change heads and remove the intake, but why cant you use the old head bolts?. And what comes in the install kit?. Thanks for any info you can give me. Larry

 

Larry,

The head bolts are torque to yeild. They will deform and give false torque readings if reused. I kinda figured you knew 'bout the gaskets. The kit contains all you need to re-install the head, nuts bolts, yada, yada...

Regards

Jean Marc Chartier

 

So. What ever happened with this swap?

I'm thinking if I can get by smog, then I may do this too. Or it's time for a new diesel.

Mike

 

No kidding, now I'm interested too. Or at least in putting the newer heads on my 2000 4.6.

 

Let's try this again!!!! now being in 2004 and wanting to do the same type of swap for my 2000 4.6L expy, what is the best way to go about it? Has anyone looked into the new 5.4L in trucks or expys or billet/cobra stangs etc etc? HHEELLPP

 

I'd give a good look at the ZF trannies from the SuperDuties. I wouldn't try to race using one, but it would probably hold up. I don't know if they would fit or not, though.

 

I have heard the new 5.4 won't work because so much of the computer is tied to the dash assembly. Too bad. The 4.6 from a Bullitt or Cobra should work with the right chip program, but you'll lose low end torque if you use the Mustang cams. The only real difference on the Bullitt engine to the regular GT is the intake and a larger throttle body, IIRC. If you are going to swap engines, I would look to the 300 Intech 5.4 used on Lincoln Navigators. It's DOHC 32 valve and has been done. There was a guy selling one from his Expy on http://fordtruckworld.tenmagazines.com/ not too long ago. He had it in his Expy and it ran great and was awesome but he decided to try to put a V-10 in.

I've decided that if I ever do anything to my engine, I'll get the PI heads from a Mustang, swap in my truck cams, and possibly add a supercharger. And then see how long the manual transmission holds up.

 

WOW that was a great reply Bratpane!!! That does make sence to go with the NAVI engine. I have the 4.6L, do you know if the tranny is cool to hold up to the navi engine? Also I would have to get the computer as well I suppose?
THANKS 4 YOUR HELP

P.S. I think that has 300HP + 300LBS RIGHT?