Merle Coggins Posted April 23, 2013 Report Posted April 23, 2013 Here's the official announcement for everyone. Merle
Ram Man 02 Posted May 12, 2013 Report Posted May 12, 2013 I wrote this down, hopefully i can make the drive
Young Ed Posted May 12, 2013 Report Posted May 12, 2013 I wrote this down, hopefully i can make the drive I am considering it as well. Perhaps you Mark and I can caravan. 1
ggdad1951 Posted May 13, 2013 Report Posted May 13, 2013 I doubt FEF will drive all the way across Wisconsin....that 50MPH top speed would kill you guys, but I PLAN on being there with via the GMC (with box on) Ed we sill have to tach him this spring!
Merle Coggins Posted May 13, 2013 Author Report Posted May 13, 2013 (edited) I've said it several times Mark... According to the math your truck should run with mine easy. If my truck can make it to the Twin Cities this summer I'm sure yours can make it to my house. According to Goodyear, your Wrangler DuraTrac 235/85R16's have a diameter of 31.7" or 659 revolutions per mile. Using a typical calculation forumula of mph X gear ratio X 336 / tire diameter = RPM, your truck will be within 145 RPM of mine at 65 MPH. 65 MPH X 4.3:1 gear ratio X 336 / 31.7" diameter = 2962.5 RPM (70 MPH = 3190.4 RPM and 75 MPH = 3418.3 RPM) I have Yokohama Geolander H/T-S 265/75R15's on my truck with 3.73 gears. Yokohama specs my tires at 28.9" diameter or 719 revs/mile. 65 MPH X 3.73 gear ratio X 366 / 28.9" = 2818.8 RPM (70 MPH = 3035.6 RPM and 75 MPH = 3252.5 RPM) Of course actual numbers may vary slightly. In reality you need to use the loaded diameter by measuring the loaded radius (from the ground to the center of the axle) and multiply by 2 for diameter. Edited May 13, 2013 by Merle Coggins
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