Gas mileage with different gear ratios & tires
06-29-2010, 10:28 AM
#1
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Year: 1994
Model: Cherokee
Engine: 4.0
Gas mileage with different gear ratios & tires
What gas mileage are you guys getting with what gear ratio and tires?
I seem to be pulling 16 MPG with 4.11's and 235/75R/15's.
I seem to be pulling 16 MPG with 4.11's and 235/75R/15's.
06-29-2010, 11:22 AM
#2
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 I6
about the same with 3.55 and 31's in town. i have a bored out throttle body which made a huge difference. prior to the tb i was getting something like 12
06-29-2010, 11:36 AM
#3
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Year: 1995
Model: Cherokee
Engine: 4.0
i got 13.5 mpg on the hwy (interstate 81) i try to stay out of the gas as much as poss but i keep up with the flow. 4:10's and 35 x 1250's
i am thinking about going down to 33 x 1050's to help my mpg and stop the rubbing when flexing
i am thinking about going down to 33 x 1050's to help my mpg and stop the rubbing when flexing
06-29-2010, 12:14 PM
#4
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Year: 1996
Model: Cherokee
Engine: 2.5L 4 cyl
did you get your TB bored at a machine shop or buy a aftermarket one? I have a 2.5L and want to swap the TB to one from a 4.0 but maybe is cheaper to just get mine bored? the jy wanted $50
06-29-2010, 12:41 PM
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Year: 1998
Model: Cherokee
Engine: 4.0 rebuilt w/ bored TB, banks header, upgraded ignition, 3 row rad, high flow h2o pump, 180* t-stat
around 16 in town on 32's at 28 PSI and 4.56's....
i drive it like i stole it tho....
i drive it like i stole it tho....
06-29-2010, 12:44 PM
#6
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I feeeeel ya
I get somewhere around 15-16 as well.. putting gas maybe every 3-4 days and i feel up $55. Sucks.. but i found this fuel saver thing and i put it on my car... now i get a little more which helps.. try it..
http://www.performancechiptuning.com...aver+Module/3/
http://www.performancechiptuning.com...aver+Module/3/
06-29-2010, 12:45 PM
#7
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0 I6
i got mine from strokedjeep.com and it was 90 plus shipping (9 bucks) and a core charge which i got back (50 bucks). dude, it makes such a huge difference. if you can swap yours with a 4.0 and it is a difference in size, try it out. if you like it, then you can get a bored one like the one i got and have an even bigger throttle bore.
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06-29-2010, 12:47 PM
#10
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Year: 1998
Model: Cherokee
Engine: 4.0 stock
I get somewhere around 15-16 as well.. putting gas maybe every 3-4 days and i feel up $55. Sucks.. but i found this fuel saver thing and i put it on my car... now i get a little more which helps.. try it..
http://www.performancechiptuning.com...aver+Module/3/
http://www.performancechiptuning.com...aver+Module/3/
Really?? You know that is a magnet you put on your fuel line right?
EDIT: nvm that is a page that sells an electric super charger
Last edited by razor02097; 06-29-2010 at 12:50 PM.
06-29-2010, 02:35 PM
#11
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Model: Cherokee
I just checked my 90 model with 235x15" tires and 3.55 gears for the 1st time and am happy with my 19 mpg. Mostly country road driving.
I was afraid it was not going to get very good being a 4x4 but I can live with this just fine
clint
I was afraid it was not going to get very good being a 4x4 but I can live with this just fine
clint
06-29-2010, 02:44 PM
#12
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
i got mine from strokedjeep.com and it was 90 plus shipping (9 bucks) and a core charge which i got back (50 bucks). dude, it makes such a huge difference. if you can swap yours with a 4.0 and it is a difference in size, try it out. if you like it, then you can get a bored one like the one i got and have an even bigger throttle bore.
06-29-2010, 02:52 PM
#13
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Year: 1998
Model: Cherokee
Engine: 4.0HO
235/75r15 and 3.55 and I get 17mpg with a mix of short interstate and street. I am going up to 31x1050r15 and 4.10 in a week or so. I am not sure if this will change my fuel mileage or not. Still debating the 4.10 or 4.56 though.
06-29-2010, 03:53 PM
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Year: 1996
Model: Cherokee
Engine: 2.5L 4 cyl
i got mine from strokedjeep.com and it was 90 plus shipping (9 bucks) and a core charge which i got back (50 bucks). dude, it makes such a huge difference. if you can swap yours with a 4.0 and it is a difference in size, try it out. if you like it, then you can get a bored one like the one i got and have an even bigger throttle bore.