Well... If a 12 second Mustang had an open diff, would it be able to accelerate as fast in the 1/4 mile as one with a locked rear end? No.

Why? Not enough traction. So yes, a L/S will help you accelerate faster.

And I agree completely. With larger than stock tires, you'll want to upgrade those gears...

 

Nice point.

 

I see what you did there!

 

Seriously!

In all truth I dont think he has enough power (not knocking on the 4.6) where its going to make a huge difference.

 

Even a 5.4 would be a dog with 3.31's. He is just focusing on off-roading.

 

Mine was with 3.55's and 33's. I now have 4:10s front and rear, peppy now.

 

i dont care if you dont think i dont have enough power you have never driven my truck so u wouldnt know. plus i havent put a computer chip and stuff in it yet that i play on doin and a cold air intake and true dual exouhst tht will give it more power so you need to shut up and stop doggin on peoples trucks

 

He's EXTREMELY defensive about any negative comments about 4.2's. Some how he believes that the engine with more power and torque cannot possibly beat the weaker one.

 

yea i know right well he needs to stop doggin on peoples trucks

 

Although i drive a SINGLE CAB, 3.55, 4.6l on 28's. So i drive SOMETHING thats way faster than yours, I know the potiential of the 4.6 and wish i put the money into my 4.6 that i put into my 4.2.

If you want a very good mud truck do this:

E-Lockers
4:10s
A good set of tires.

Power:
VMP tuning
SI/DO Exhaust
Gott mod intake

 

Ever heard of power to weight ratio, I would love to see you post how much your truck weights. My 4.6 and 4.2 are only 100 pounds difference, that is that 10 HP, and thats a Rcab vs. Scab. I would love to see a 1997-2003 4.6 Supercab post its weight. My girls 4.6 2V Rcab weights 4496#'s thats 400lbs more than my 4.2 something that 20 something horsepower WONT make up.

 

220 HP would be on a non-pi 4.6 from before 2001. The PI 4.6's are rated at 248. The curb rating on my truck is like 4700, but who really knows how much it weighs without a truck scale. The only way to even remotely know which truck would win in a race would be for you to post your 0-60 time on you truck.

 

Agreeing with punisher kinda scares me.. its different.

 

I don't know where you're coming up with those horsepower to weight ratios/calculations, but they're WAY off.



Lets say you have a '97-03 F150 (XL, reg cab, short box) and it's roughly 4,800 lbs (the listed curb weights are way low, my truck was about 800 lbs. off). And you have the the PI 4.6L with 231 HP at the crank. The power:weight ratio = .048

So... A 48 lbs. loss in weight equals about a 1 HP gain in power/acceleration. A 100 lbs. difference in trucks wouldn't be noticable. Can you feel the "loss" in power when your 12 year old nephew rides with you?

And your "4,000 lbs." (way underestimated) V6 F150 with say 217 HP at the crank (a generous 15 HP more for your mods) has a power:weight ratio of .054

So, that 400 lbs. heavier 4.6L (it's actually 800 lbs. heavier in my calculations I used) still has a better power:weight ratio than your 4.2L... The torque difference would be even greater.

 

I wanna say last time i was at the dump, my truck weighed somewhere in the mid 5's. But i also have a 300 something lb subwoofer box! lol