Join Date: Jul 2006
Location: Salt Lake City, UT
I'd say the most you should do is bored TB and a free-er flowing muffler. Other than that just enjoy the trip!
FTR, I have a bored TB to 60 mm(Largest on Renix) and no muffler- waiting on a welder. My last trip was 300 miles on the tank without corrected speedo due to 31's and 3.07 gears. This averages about 330 miles to the tank. The tank I approximate was 17.5 gallons full until my approximate "close to empty". Thats about 18.86 MPG.
150 Miles were Highway but fully loaded on a camp trip, about 700 lbs loaded extra
50 Miles Highway, 2 other passengers
100 Miles City
***30 Miles 4HI and 4LO offroading***
I have also taken out the air intake silencer and cut a hole on the firewall side of the airbox.
87 XJ pioneer-Totalled
96 XJ Sport- Sold
Now: 88 RENIX 4.0 XJ, Project Overlander
3.5" Lift, RE SF LCA's with skids, 31x10.50R15 Duratracs, ARB Roofrack, Custom Bumper, Glasspack, Bored TB, Custom seats