RPM question
01-06-2011, 04:17 PM
#1
JK Junkie
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Join Date: Mar 2009
Location: Scottsdale, AZ
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RPM question
Hey what was the RPM that JK engines like to cruise at again? At what RPM is it more efficient? I usually cruise around at 1600-1900 rpm and I drive all flat ground everyday. Also I'm turning Rubi tires with 3.21 gears
Last edited by matt852; 01-06-2011 at 04:20 PM.
01-06-2011, 04:27 PM
#2
JK Freak
Whatever your preference is should be fine but as a general rule the faster your engine is turning the worse your fuel economy will be. I have the 3.21 gearing with stock size 255/75/17 tires and am happy with the performance, especially due to the fact that I usually average over 21 mpg on the highway. But I will say I am sure that other JKs with higher gear ratios (4.10, 4.88, etc) will out accelerate me in a race (not that it matters). 