I had to chime in.....I've owned 4 Fords that are powered by 5.4's. I've owned one that had non P.I. heads in an expy, and I was able to light up the rear wheels. Had 3.73 gears. The other ones were an 02 FX4, that one had fake duals and the K&N cold air intake with 3.55 gears, that one too had plenty of power. I had a 99 Expy, 3.55 gears and the stupid all wheel drive system, that one always had to kick in the front axle for help cause the rear wanted to spin all the time. I now have a 2000 Harley Davidson, 3.55 gears and 2WD, and well that wants to roast the 20" wheels that are on it. I have drove an 05 FX4 with the 5.4 and it doesn't feel as potent as the 2V 5.4. I think it has to do with that stupid drive by wire crap. I'm not sure what 5.4's the guys on here drive, but I've never had any trouble keeping up with traffic...

 

I have to agree, my 2v feels more powerful than all the 3v's I have drove. I've drove a reg cab short box, a super cab short box and a screw short box and they all had the 3v 5.4 and they felt less powerful than my truck. They may have felt a little weaker than mine but I still haven't drove or rode in any 5.4l that was a dog.

 

Actually, my 3 valve wasnt very impressive in the rockies. I brought it over here to the east and it must have been the elevation. It doesnt feel like the same truck. So, I still think they feel less powerful than the 2 valve, but are still very strong motors with the right environments and tuning.

 

update on power.

i ran the car in 30 degree conditions. the track was basically ice, but i managed to get 82 mph in 1/8th. et 9.5. i spun all through 1st and part through 2nd.

car weighs 3452 with me in it. that calculates to 326 fwhp. the intake quits at 5200 not 5700. shifting there was a waste. so the cams are getting retarded 8 1/2 degrees, and the short runner intake is going on. i actually need to lose a bunch of low rpm torque if i'm going to get a good ET.

 

dont you mean RWHP...

 

I think the 5.4 is a great engine it just needs a few minor enhancements to bring out it's true potential. My 2000 4x4 with Superchip (max tow tune), Magnaflow 3" cat-back exhaust, 4.10 gears and S&B Air Filter tears-it-up for a 4x4 truck, even with 33" tires. I am sure if you 3v guys put similar upgrades your trucks would be much happier with the 5.4!

 

no flywheel. the hp calculator uses MPH and weight to figure flywheel hp.


rwhp for auto is 20% lower or 260 rwhp. i figured 270, but it doesn't quite reach it. it was 2 mph slower than i figured. the reason is either the manifold or the fact that i can't retard the cams yet. i'm going to fix that next and see if i get the extra 2 mph.

 

My 2003 4x4 Runs Great Have A Banks Exhaust An A K/n Intake Tube With A Throttle Body Spacer. Also K/n Filter

 

typically 2 valve engines reaches the torque peak quicker than 3 or 4 valve engine. the 2 valve will fill the cylinders better at low rpm than a 3 or 4 valve because the intake charge has a greater velocity. at higher RPM the 2 valve lwill not fill as effectively as a 3 or 4 valve engine. so a two valve of the same HP as a 3 valve will get of the line faster but will not pull as hard at top end as a 3 vlave. these are generalizations and may not apply equally to all vehicles.

my 97 4.6 F150 , automatic smokes the tires off the line because it makes the torque at low rpm. my 01 cobra feels doggy off the line unless you slip the clutch a little and keep the rpm up. but once it hits 3000 rpm your can feel avery strong surge of power and it a good idea to have the traction control on. its fun without the traction control if you like getting sideways

 

My 2003 SCREW with a 5.4 has all the power I'll ever need. Of course I will add things like intake/filter, efans, and exhaust...but that's a given.

Even stock though I am completely happy with my output.

 

Good Grief. As much as I loved surprising some of the big block guys with my 351C, It took nitrous to get the power I produced when I built a 428CJ, a 429CJ and a strong 460. Small blocks are fun and it is lots of fun when you can overahieve with one, but there is no making up cubic inches. Not if you build it right. I think the most fun I have ever had is with a buddy that was a magician with the old 289s. We built a 65 Falcon Futura with left over 289 parts. That engine was about 5 or 6 colors, we never painted it. I remeber 2shades of blue, white, red, silver and black. It had a 4 speed and 5.11 gears, 800 double pumper, no nitrous. We came off the line at 7000 RPMs and took it to near 11,000. You had better be ready to grab some gears as you were in 4th at about the 1/8th mile. Ran a 10.98 twice and several 11.00. I get chills when I think of the scream that little engine would make. The same buddy had a 427 in a 67 Fairlane and it was a pretty even match in a quarter. The 427 had to play catch up and depending on conditions, did not do it every time.

 

dayumn 11,000RPM in a pushrod!!!

 

i watched a 1965 4 door comet kill a pullied, intaked, and exhausted lightning friday night. the comet was primer red, 428, four speed, and the trunk won't close.
he left harder off the line, and pulled away the rest of the way. the lightning ran 8.7. and lost.

 

my 97 5.4L goes both ways...everything is stock except the flowmaster exhaust kit...sometimes ill get on it and it will smoke the tires and really pick up well....other times it seems like the computer decides to kick in and it is real hard to get movin until about 3000 rpms then it starts to take off...

 

Pigs?? Hook a 10000lb trailer to a Dodge Hemi and a Ford V10 (even a 2v V10) and see which engine is a pig. Same deal with Chevy's "newer" engines. The new 3v V10's even blow the GM 8.1L off the road.