Lifted MPG
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Lifted MPG
Hi Everyone...I have a 94 4x4 ranger xlt ext. cab w/ 4.0 L and I am planning on lifting it this summer 6 inches. I'm just curious as to how much MPG some of you have lost due to bigger tires .... by the way I'm planning on putting on 35's. Any tips that you could give me to improve my gas mileage would be helpful. Also would different gear ratios help as well ?
Last edited by ilranger; Apr 19, 2003 at 02:17 PM.
Freshman User
Joined: Feb 2003
Posts: 26
Likes: 0
From: Platteville, CO
Lifted MPG
Hello ilranger,
With the 6" lift you will definately have more wind drag. I just put on a 6" lift and 35x17x8 MT's on my F150 and went from 19 down to 10mpg. I'm looking into some other performance enhancers such as exhaust and air intake so that should help some.
You might want to check the gear ration guide if you are going up that big in tire sizes http://www.4wdpartscenter.com/faq/gearguide.htm
"How will it affect the acceleration performance of the truck?"
The answer is that it has the same affect as changing the axle ratio of the truck.
(Original Tire Diameter / New Tire Diameter) X Original Axle Ratio = Effective Axle Ratio
Example:
(27" / 32.5") X 3.50 Original Axle Ratio = 2.91 Effective Axle Ratio
"How will it affect the performance of the truck on the highway?"
(Original Tire Diameter / New Tire Diameter) X RPM@MPH = New RPM @ actual MPH
This example is for 55 MPH
Example:
(27" / 32.5") x 2400 RPM = 1985 RPM @ 55 mph with new tires.
"How far off will the speedometer be?"
May be speeding ticket time!
(New Tire Diameter / Original Tire Diameter) X Indicated Speed = Actual Speed with new tires
Example:
(32.5" / 27") X 55MPH = 66.2 MPH Actual Speed with new tires
"What can I do to regain the performance?"
Change the differential gears if the truck is equipped with solid axles at a cost of about $400 - $500 per axle.
(New Tire Diameter / Original Tire Diameter) X Original Axle Ratio = Required Axle Ratio
Example:
(32.5" / 27") X 3.50 Original Axle Ratio = 4.20 Required Axle Ratio
Hope this helps.
With the 6" lift you will definately have more wind drag. I just put on a 6" lift and 35x17x8 MT's on my F150 and went from 19 down to 10mpg. I'm looking into some other performance enhancers such as exhaust and air intake so that should help some.
You might want to check the gear ration guide if you are going up that big in tire sizes http://www.4wdpartscenter.com/faq/gearguide.htm
"How will it affect the acceleration performance of the truck?"
The answer is that it has the same affect as changing the axle ratio of the truck.
(Original Tire Diameter / New Tire Diameter) X Original Axle Ratio = Effective Axle Ratio
Example:
(27" / 32.5") X 3.50 Original Axle Ratio = 2.91 Effective Axle Ratio
"How will it affect the performance of the truck on the highway?"
(Original Tire Diameter / New Tire Diameter) X RPM@MPH = New RPM @ actual MPH
This example is for 55 MPH
Example:
(27" / 32.5") x 2400 RPM = 1985 RPM @ 55 mph with new tires.
"How far off will the speedometer be?"
May be speeding ticket time!
(New Tire Diameter / Original Tire Diameter) X Indicated Speed = Actual Speed with new tires
Example:
(32.5" / 27") X 55MPH = 66.2 MPH Actual Speed with new tires
"What can I do to regain the performance?"
Change the differential gears if the truck is equipped with solid axles at a cost of about $400 - $500 per axle.
(New Tire Diameter / Original Tire Diameter) X Original Axle Ratio = Required Axle Ratio
Example:
(32.5" / 27") X 3.50 Original Axle Ratio = 4.20 Required Axle Ratio
Hope this helps.
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