My 4.0L lost a little going from 31x10.5 to 33x12.5 and I currently have 3.73 gearing. The biggest loss is at higher gears up ANY type of grade. I would imagine a 4banger would really suffer high gears.
04 Sahara, with a lift, some stuff, and a few things, on some 33's, blah, blah, blah.
A perpetual work in progress. Too much to list, not nearly enough to matter.
My RigRater Score: 387RRv1.0 with a BOA of 18.92 (and just how exactly is this going to help me over that big arse rock?) http://www.myjeepsite.com/nregas1 Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut.
~ Ernest Hemingway