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Posted by Ggg [66.222.48.140] on Thursday, August 23, 2012 at 15:35:54 :
In Reply to: Re: Trans choices posted by Ggg [66.222.48.140] on Thursday, August 23, 2012 at 15:25:41 :
Just for comparison a 1:1 final trans gear, 4.11, 65mph would yield 2560rpm with the 35" tires and 2270 rpm with the 39.5" tires. It doesn't sound like a big jump but once you get a little above 2000rpm your economy really drops off fast. Changing the governor spring will allow the engine to rev higher but doesn't change the fuel consumption characteristics. I would strongly recommend some type of intercooler as well. I built my Jeep for trail use only so it doesn't have any IC but when I drive it on the road the egt's really climb fast even with only a mild incline.
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