How much Horsepower is this engine suppose to have?

I can't find it listed anywhere on my sticker (the thing that came on the widow) or in any of the other papers.

It's in a 2000 f-150 XLT with highway gears.

 

220 hp and 290 lb ft of torque.

 

Does changing rear diff increase the horsepower?

Not too sure about this.

Edit: Stupid thing to say. If I was sure about it, then I wouldn't be asking it.

 

It doesn't change the actual horsepower coming out of the engine. But it does make it feel a lot quicker off the line. A good analogy I heard on this board is imagine a 12 sp. bicycle. Think of the difference taking off in 1st gear and how hard it is to take off in 12th gear.

 

It is like Y2KXLT said with the 12 speed bike. Changing your gears say from a 3.55 to 1 to a 4.10 to 1 would be like shifting down on the bike giving more torque output to the ground. The burnouts would be impressive!!

 

The higher you go in gear ratio, the more top end speed you lose.

Remember that when making a choice.

 

2000 have 231 hp and 293t

 

How much would my mpg's be changed if I switched from 3.03's to 4.10s with no change in tire size?

 

WELL FOR ME THAT IS A HARD QUESTION TO ANSWER SCIENTIFICALLY...SOMEONE ELSE WILL PROBABLE BE ABLE TO TELL YOU. BUT HERE IS SOME FOOD FOR THOUGHT. IF YOU HAVE AN SUTO TRANNY YOU SHOULD BE RUNNING ABOUT 1500 RPM WHILE CRUISING ON THE HIGHWAY NOW WITH THE 3.03 GEARS. I HAVE 3.55 GEARS IN MINE AND CRUISE ABOUT 2000 RPM AT 80. WITH 4.10 GEARS AT WELL LETS SAY 70 MPH (YOU WONT WANT TO DO 80 WITH 4.10 GEARS TOO OFTEN IT WILL BE LOUD) YOU WILL PROBABLY BE ROCKIN AT 3000-3200 RPM BUT THAT IS JUST SORT OF AN EDUCATED GUESS. SO I WOULD SAY YOU WOULD CUT YOU MPG BY ABOUT 5-8 MPG ON AVG.

 

I seriously doubt that you would drop 5 to 8 mpg. For some that would be 1/3 to 1/2 of what they get now.
I tow and at highway speeds, with 3000lbs behind me and overdrive locked out and I drop about 4-5mpg. It is hard to tell just how much you would loose. Sometimes gearing helps get you into an ideal rpm range and actually helps milage.
My guess would be more like 1-3mpg. If you use a strait forward calculation of 4.10's being 25% lower then 3.03's, asuming you average 18mpg, you loose 4.5mpg. I doubt it will be that much. Highway milage would probably suffer more then around town.
Personally, I could not stand the performance of 3.03's and I plan to replace my 3.55's with 4.10's real soon.

 

is the 220 hp and 290 lb is that at the rear wheel?

 

No that's not at the wheels . . . that just the engine rating. I'm not exactly sure how much it loses through the driveline but it's a little . . . and the amount will also depend on if it's a 5 speed or auto . . .

 

2001 was the first year FORD rated the 4.6 at 231hp in the F150 2000 and before is 220hp.

 

my little ford book says 231 and the truck is a lot faster than my dads 98 ever with my being a stick its still a lot faster:p

 

Intel486,, you must get pretty dam good MPG with that gear ratio
3.03's? what are you getting now ,,
and why would you want to change to 4.10,,,for the increase in torque???