|
Have 05 KJ LTD 31 STs 3 1/2" lift ARB bullbar V6 auto Petrol. Used to do 12.5 lt/100 stock after the mods its does about 15-18 yesterday did Melb-Syd 9 hours and 14.7 lts/100. Difference, used the high octane fuel 95 and 98, why:
I found it was a bit out on the gearing with the bigger tyres and wasn't happy holding overdrive. (Kept kicking down) on the trip down to Melb (15.7 lt/100).
The extra grunt from the 98 octane fuel helped to keep it in overdrive longer without the kickdown. I kept the revs under 2,000 where possible, soon as I put the boot in I could see the instant read out on the overhead consol go out the window as the revs went up to 4-5000.
Looks like the gearing needs to be a fraction lower with the larger tyres to improve the fuel eccon or get a few more horses out of the engine.
Not sure if a chip fix or extractors is the way to go.
|