Like I said, this fact is not something that 5.4L owners want to hear.

 

its not the obvious! they both can have the 6 speed. 4.6 and 5.4 equipped with 6 speed will not be ending with the 4.6 winning.

im with ya

 

i say prove your own! otherwise...

 

my 4.3 v6 could beat any 5.4....... lets go haha

 

my non PI 4.6 could run with any 5.4 lets line um up!

but that doesnt make any since the 5.4 has a bigger bore by all means it should make more power.

 

Same bore as a 4.6L, just longer stroke.

 

i always forget witch one it is. but then i rember because i have 5.4 heads on my 4.6. brain fart.

could it be because the 4.6 doesnt have to stroke as far? it spins faster and quicker?

 

Bingo!

I just can't figure out why Ford rates the 5.4L at 310 hp and the 4.6L 3V at 292 hp because when you put them on the dyno the 4.6L makes more hp.

 

ok brother. im game

 

5.4's have more tq. 4.6's rev higher with the shorter stroke.

 

the 3v 4.6 is a very nice engine. i'll give it that. overall the 5.4 makes more power than the smaller. 4.6 makes power at a much higher range which is good for a car but truck? do you have any dyno pics or such. that would help.

they prob rate it higher because it is higher

 

Sure. Superchips makes performance products for both engines and they dyno-test the engines stock so they have a baseline for the improvements. I presume they used the same dyno and methodology. The 4.6L 3V makes six more hp than the 5.4L. Dyno results here:

https://www.f150online.com/forums/ch...-f150-v8s.html

The 4.6L has far more performance than the 5.4L of just a few years ago and mated to the 6-speed tranny there is no comparison. The shorter stroke turns it into a real nice mill. It is smooth as glass and very responsive. The EPA fuel figures do not tell the real story either. The 4.6L is much more efficient at idle and has surprising torque - it will pull in 6th gear from below 40 mph without downshifting or chugging. The variable camshaft timing is what makes it all possible. There is a real world difference of 2-3 mpg in mixed driving which translates to a fuel savings of almost 15%. That's a nice savings and the more you drive the more it matters.

Having driven both, the 4.6L 3V felt faster, smoother and more responsive than the 5.4L. That's the main reason I chose the 4.6L. And while it does the real work higher in the RPM band, the difference is not as much as I thought it would be. Towing a two horse trailer over numerous mountain passes, I was rarely over 2300 rpm's and it would pull gentle grades at 60 mph (with horse trailer) without downshifting to 5th.

 

you swapped in a chevy 4.3L? Why?

oh that reminds me: