Are two speed transmissions worth it?

[kramarczyk]

Originally Posted by thefro526

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Also are my speeds a bit off? Would the speeds that come out of the transmission be higher or lower with normal gearing (KOP gears)? And what experiences have you had with your teams transmissions? My GMP (Grand Master Plan) is some kind of six wheel or eight wheel drive (like 1270) with IFI high traction wheels. Any advice on 6 or 8 wheel two speed drive trains would be greatly appriciated

-Dustin

This year we used a 6WD with 8" Roughtop AM Performance Wheels and the AM servo shifter (2 speed) with a pair of the little CIMS into each. We also had a 10:24 out to the wheels which gave us theoretical hi/low speeds of 15.6 fps and 6.10 fps resepectively and more realistic continuous 30 amp speeds of 12.3 fps and 4.8 fps. Calcs were largely done in this spreadsheet by JVN. http://www.chiefdelphi.com/media/papers/1676