I was attempting to figure out a final ratio for a FXT I'm building. I thought I knew what I was doing and have been running the same engine and basic tire size on a BP with a 700. The new one will have a 1 to 1 LAGB so I figure this is easy, I'll just figure out what I have for a final on the BP and subtract 3 (for the 700 running in a 25/25). According to the EC calculator that does not work, why? What am I missing? I look at that calculator and I see a 8" engine pulley to a 5" tranny pulley = .625, through the tranny through a 25/25 gear set = 3, 12 tooth tranny output to a 46 axle = 3.83. now that equals 7.46 no matter how many times I add it up, BUT the calculator tells me 7.19.
I know I'm about to feel silly and wish I would have never asked but let me have it, what did I miss???
With your 700 setup out put@tranny=1.875x3.83=7.19 (input@ tranny=1.6,tranny ratio=3,divide 3 by 1.6=1.875 outputx3.83=7.19 final ratio) Hope this helps explain your mystery!!