4.8 vs. 5.4.....what is the HP difference?
05-25-2016, 10:44 PM
#11
Senior Member
05-25-2016, 10:52 PM
#12
I own a 2K Expedition XLT 4X4 with the 4.6L. I did a little bit to it...K&N, cutaway intake box and constant-radius air tube, underdrive pullies, clutch fan delete and replace with dual electric, Gibson cat-back and a Superchips tune. The tranny got a performance valve body. Synthetic fluids all around. Pulled a 6.3K 6x14 TA cargo trailer for more than a decade and dozens of thousands of miles, and never felt a lack of power. Sure, I may have liked to have more, but that's different from NEEDING more. Just got back from a 15-mile freeway blast and it's as solid as ever at 207,730 on the clock.
05-26-2016, 11:34 PM
#14
Senior Member
Thread Starter
I own a 2K Expedition XLT 4X4 with the 4.6L. I did a little bit to it...K&N, cutaway intake box and constant-radius air tube, underdrive pullies, clutch fan delete and replace with dual electric, Gibson cat-back and a Superchips tune. The tranny got a performance valve body. Synthetic fluids all around. Pulled a 6.3K 6x14 TA cargo trailer for more than a decade and dozens of thousands of miles, and never felt a lack of power. Sure, I may have liked to have more, but that's different from NEEDING more. Just got back from a 15-mile freeway blast and it's as solid as ever at 207,730 on the clock.
If the 5.4 Is actually Better, I certainly would be amazed.
I think it is mainly a difference of a few "Ponies"
05-27-2016, 12:29 AM
#15
Looking for a Henway.
iTrader: (2)
That is similar to my experience. I have a 2000 F-150 TRITON also w/4.6. My truck has 201,000 miles and it runs as well now as any vehicle I have owned and I have owned a Lot of cars and trucks(Foreign and Domestic).
If the 5.4 Is actually Better, I certainly would be amazed.
I think it is mainly a difference of a few "Ponies"
If the 5.4 Is actually Better, I certainly would be amazed.
I think it is mainly a difference of a few "Ponies"
'97-'00 4.6:
220 hp @ 4,750 rpm
265 lb-ft @ 4,000 rpm
'97-'98 5.4
235 hp @ 4,250 rpm
335 lb-ft @ 3,000 rpm
the 5.4 has 15 more HP 500 rpm lower, 70 more torque 1000 rpm's lower
'01-'03 4.6
231 hp @ 4,750 rpm
293 lb-ft @ 3,500 rpm
'99-'03 5.4
260 hp @ 4,500 rpm
350 lb-ft @ 2,500 rpm
The 5.4 has 29 more HP 250 rpm lower, 57 more torque 1000 rpm's lower.
Having 350 ft/lbs of torque at only 2500 rpms makes the 5.4 a much better towing truck.
05-27-2016, 09:01 PM
#16
Senior Member
Definitely better at towing but deosn't mean the 4.6 can't tow.
I tow a 16.5 ft fiberglass boat all the time with mine and I see no lack of power.
Does the trick for me with less fuel consumed
I tow a 16.5 ft fiberglass boat all the time with mine and I see no lack of power.
Does the trick for me with less fuel consumed
05-27-2016, 10:11 PM
#18
Senior Member
Are you sure you want Horsepower instead of torque?
5.4 V8 engine don't have low end, its from the torque converter. The problem is it overheats & wear too fast depending how you step on the throttle. Bigger is not always better. It's proven by 9th Generation 4.9 Straight-6 engine that has more low end torque compaired to all V8 engines.
265 ft-lbs @ 2,000 RPM.
4.2 V6
http://www.knfilters.com/dynocharts/57-2550_dyno.pdf
4.6 V8
http://www.knfilters.com/dynocharts/57-2514_dyno.pdf
5.4 V8
http://www.knfilters.com/dynocharts/57-2541_dyno.pdf
Ford short explanation of torque.
5.4 V8 engine don't have low end, its from the torque converter. The problem is it overheats & wear too fast depending how you step on the throttle. Bigger is not always better. It's proven by 9th Generation 4.9 Straight-6 engine that has more low end torque compaired to all V8 engines.
265 ft-lbs @ 2,000 RPM.
4.2 V6
http://www.knfilters.com/dynocharts/57-2550_dyno.pdf
4.6 V8
http://www.knfilters.com/dynocharts/57-2514_dyno.pdf
5.4 V8
http://www.knfilters.com/dynocharts/57-2541_dyno.pdf
Ford short explanation of torque.
Last edited by w0lvez; 05-27-2016 at 11:30 PM.
05-27-2016, 10:50 PM
#20
Senior Member
