poor mileage
#31
02-28-2005 | 03:55 PM
Senior Member
Joined: Nov 2004
Posts: 140
Likes: 0
From: Mesa
......then take the circumfererence of the rim, and subtract by .05x....with X being the wieght of your rim - We'll use this number later.
C-.05x = overall drag from weight of rim
Take a ruler, find our how tall your tread it, we'll be finding out the surface area of your tread to just see how much is going to be touching the pavement every time the wheel does one complete turn. multiply the hight by the width of the tread and if your with goodyear, divide by 4.3. Firestone - 9.8, all other brands, use an average of 6.7...
H(W)/4.3 = Surface area of goodyear tread on pavement.
Take that number, and multiply by four (four tires) Divide by the first original number, and then and that is your total drag from oversize tires.
(H(W)/4.3)4/C-.05x = T(x) Total Drag
Plug that formula into what Myst referred to, and you'll have a correct MPG calculation.
I can't believe I wasted my time writing up something that asinine.
I'm now more stupid from writing it.
C-.05x = overall drag from weight of rim
Take a ruler, find our how tall your tread it, we'll be finding out the surface area of your tread to just see how much is going to be touching the pavement every time the wheel does one complete turn. multiply the hight by the width of the tread and if your with goodyear, divide by 4.3. Firestone - 9.8, all other brands, use an average of 6.7...
H(W)/4.3 = Surface area of goodyear tread on pavement.
Take that number, and multiply by four (four tires) Divide by the first original number, and then and that is your total drag from oversize tires.
(H(W)/4.3)4/C-.05x = T(x) Total Drag
Plug that formula into what Myst referred to, and you'll have a correct MPG calculation.
I can't believe I wasted my time writing up something that asinine.
I'm now more stupid from writing it.
#33
02-28-2005 | 04:29 PM
Senior Member
Joined: Oct 2004
Posts: 147
Likes: 0
From: From the Burgh, Pa
Originally posted by SteveVFX4
Carl, what kind of MPG do you get driving around here in the South Hills?
I've been averaging around 11 mpg this winter, 13 mpg in the summer time.
Carl, what kind of MPG do you get driving around here in the South Hills?
I've been averaging around 11 mpg this winter, 13 mpg in the summer time.
#36
03-01-2005 | 08:34 PM
Senior Member
Joined: Aug 2004
Posts: 295
Likes: 0
From: tennessee
fuel consumption
i get on the average 13/14 in town and 18/19.5 highway driving. 4x4 super,3.73's and i drive like hell every where i go. i can spin out going to the mail box and its just across the street.http://www.f150online.com/galleries/....cfm?gnum=4704
#37
03-01-2005 | 09:14 PM
Member
Joined: Oct 2002
Posts: 10
Likes: 0
From: Ocean State
I drive 80 miles round trip per day with 50 on the highway. I've put 19K on since I picked up my 5.4 XLT 4WD 3.73. My mileage went down after about 4K miles and it went down again when I put a cap on the back. I'm now back up tot 15 mpg.
Has anyone noticed an increase after a flash? I gotta get in as I have the surging too....
SandSled....
Boatfish Don't Count
Has anyone noticed an increase after a flash? I gotta get in as I have the surging too....
SandSled....
Boatfish Don't Count
Last edited by SandSled; 04-19-2006 at 10:57 PM.
#39
03-01-2005 | 10:31 PM
Senior Member
Joined: Nov 2004
Posts: 366
Likes: 0
From: NorCal
Originally posted by Merek3CS
......then take the circumfererence of the rim, and subtract by .05x....with X being the wieght of your rim - We'll use this number later.
C-.05x = overall drag from weight of rim
Take a ruler, find our how tall your tread it, we'll be finding out the surface area of your tread to just see how much is going to be touching the pavement every time the wheel does one complete turn. multiply the hight by the width of the tread and if your with goodyear, divide by 4.3. Firestone - 9.8, all other brands, use an average of 6.7...
H(W)/4.3 = Surface area of goodyear tread on pavement.
Take that number, and multiply by four (four tires) Divide by the first original number, and then and that is your total drag from oversize tires.
(H(W)/4.3)4/C-.05x = T(x) Total Drag
Plug that formula into what Myst referred to, and you'll have a correct MPG calculation.
I can't believe I wasted my time writing up something that asinine. I'm now more stupid from writing it.
......then take the circumfererence of the rim, and subtract by .05x....with X being the wieght of your rim - We'll use this number later.
C-.05x = overall drag from weight of rim
Take a ruler, find our how tall your tread it, we'll be finding out the surface area of your tread to just see how much is going to be touching the pavement every time the wheel does one complete turn. multiply the hight by the width of the tread and if your with goodyear, divide by 4.3. Firestone - 9.8, all other brands, use an average of 6.7...
H(W)/4.3 = Surface area of goodyear tread on pavement.
Take that number, and multiply by four (four tires) Divide by the first original number, and then and that is your total drag from oversize tires.
(H(W)/4.3)4/C-.05x = T(x) Total Drag
Plug that formula into what Myst referred to, and you'll have a correct MPG calculation.
I can't believe I wasted my time writing up something that asinine.
I'm now more stupid from writing it.
You're killing me
#40
03-02-2005 | 04:16 PM
Member
Joined: Nov 2004
Posts: 34
Likes: 0
From: Pennsylvania
Re: fuel consumption
Originally posted by nightranger
i get on the average 13/14 in town and 18/19.5 highway driving. 4x4 super,3.73's and i drive like hell every where i go. i can spin out going to the mail box and its just across the street.http://www.f150online.com/galleries/....cfm?gnum=4704
i get on the average 13/14 in town and 18/19.5 highway driving. 4x4 super,3.73's and i drive like hell every where i go. i can spin out going to the mail box and its just across the street.http://www.f150online.com/galleries/....cfm?gnum=4704
