Going to ask this here since it is LS/JK related. I want to know as I do not see any real answers except for the scattering around of answers.
Who all drives there conversions as daily drivers?
What kind of mileage are you getting and with what combinations?
All I know is mine is horrible, getting 10-13 mpg's with that being a combination of city/highway - highway being an 11 mile drive one way on the interstate at 80 mph's.
I just got it dyno'd and all I got was more power (not a bad thing) but it did nothing for my mileage or the fact that I can not hold 6th gear, before or after the tune.
Here lately it has been a head wind of 18-25 mph's and it will not hold 6th on the flats and all most always on the overpasses with the headwind and that is in Kansas, hell it looks like this _______________________________________ almost everywhere you look around here with the occasional overpass.
I am running a 6.0, 6L80E with 4.10's and 35" tires.
So what are all you getting and how is 6th gear?
You are still on a stock tune ?
I am running a LS-3 and doing much better than you are but I'm not running a stock tune .
I have seen 17.3 mpg at the best on a long distance run calculated (not on the gauge cluster) , average about 14 mpg if I keep my foot out of it .
I'm also in a 2Dr so I'm a bit lighter , and on 37's and 5.13's .
John at Overland Performance did my tune with EFI-Live and it does hold shifts way better than the stock tune , sixth gear would kick down with the slightest increase in stock form , but now it will hang in there until I get into it about 3/8 throttle .
The difference was 'nite and day .
Right now I'm in the process of axels and changing gear ratios but I don't expect to see any mpg or performance advantages because the tire and wheel weight will increase as well as the weight increases of 60's will negate any mpg increase .
Look into EFI-Live ,I just believe there are more advantages there than the others available on the market .
Also the guy behind the tune needs to have the experience also and John
has tuned many other members here on JKO with results that speak for themselves .