2001XJ
NAXJA Forum User
- Location
- Canton, MI
Hey guys,
Can any of you link me to or explain the relationship between all of these? It is correct that your engine has to work harder to turn say, 33's with 3.55s, at 2500 rpms than the same 33s with 4.56s at the same rpms isn't it? Also at the same 2500 rpms with 4.56s you will be using less gas than 2500 rpms with 3.55s?
I got into a discussion/argument with my father and he thinks it is rediculous to think I will not see an increase in rpms and a reduction in my gas mileage if I regear from 3.55s to 4.56s. I told him I drive my jeep in 3rd gear right now, running at 2500 rpms or so to do 60 mph or whatever it is (have to re-do speedo) to get better gas mileage than running in overdrive and he said that was nonsense because it drops the rpm's down to around 2000 when in overdrive and than means better MPG. I told him that is a very simplistic way to look at it because RPM's are not the sole factor. He is convinced that rpms are directly related to gas mileage and how much gas you use. Explain to me so I can explain to him and end this stupid debate which is pissing me off.....the stuborn fool
Can any of you link me to or explain the relationship between all of these? It is correct that your engine has to work harder to turn say, 33's with 3.55s, at 2500 rpms than the same 33s with 4.56s at the same rpms isn't it? Also at the same 2500 rpms with 4.56s you will be using less gas than 2500 rpms with 3.55s?
I got into a discussion/argument with my father and he thinks it is rediculous to think I will not see an increase in rpms and a reduction in my gas mileage if I regear from 3.55s to 4.56s. I told him I drive my jeep in 3rd gear right now, running at 2500 rpms or so to do 60 mph or whatever it is (have to re-do speedo) to get better gas mileage than running in overdrive and he said that was nonsense because it drops the rpm's down to around 2000 when in overdrive and than means better MPG. I told him that is a very simplistic way to look at it because RPM's are not the sole factor. He is convinced that rpms are directly related to gas mileage and how much gas you use. Explain to me so I can explain to him and end this stupid debate which is pissing me off.....the stuborn fool
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