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post #1 of (permalink) Old 02-12-2005, 10:53 PM
bronco dan
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bigger tires and gas milage question?

I have 35's on my full size bronco now. i'm going to replace my tires soon. i have a 302 with 355 gears and my engine runs about 2300 rpm's @ 55 mph. if i go to 38 inch tires would i get better gas mileage and or lower rpm's with that tire to gear ratio?
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post #2 of (permalink) Old 02-13-2005, 08:10 PM
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Re: bigger tires and gas milage question?

Obviously you must not have an O.D. trans, 2300 rpm`s @ 55 mph with 3.55s and 35" tires, what year is your bronco? fill out your bio, may help.

lower rpm`s with 38s no question, better fuel mileage with an overworked shortstroke 302 that has no low end torque to begin with [img]images/graemlins/laugh.gif[/img]

A gear change will be in order [img]images/graemlins/gituar.gif[/img]
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post #3 of (permalink) Old 02-14-2005, 08:37 PM
bronco dan
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Re: bigger tires and gas milage question?

hey there broncomania i went to high school at umatilla.
graduated in 89
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post #4 of (permalink) Old 02-15-2005, 02:40 AM
 
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Re: bigger tires and gas milage question?

Yes taller tires=higher overall gear ratio but you get to a point where the extra wieght of the large tire makes it harder to spin. If you have to stand on it all the time hell no its not going to get good mileage. I imagine you are getting 8/10mpg now?? Thats gotta suck 35's with 3.55 gears and a 302! I wouldn't run more than a 33" tire with that setup.
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post #5 of (permalink) Old 02-15-2005, 09:24 AM
 
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Re: bigger tires and gas milage question?

Is this truck a wheeler or is it street driven only? If you plan to wheel it then 35s are about as big as you want to go on a half ton configuration. aka: Bronco/F150. To run bigger meats without breakage alot of work is in order. One ton axles are recomended.
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post #6 of (permalink) Old 02-15-2005, 06:40 PM
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Re: bigger tires and gas milage question?

BroncoDan,
Then im sure you`ve played around at saltsdale mudhole [img]images/graemlins/grin.gif[/img], i moved here only 3 years ago so not too familiar with the area but gonna have some fun with some buddies at blue sink, off SR19????
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