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I have a rather slow first run Sunset E7 A-B-A (the B unit is powered by a cable connecting to the electronics in an A unit).  When the E7's first came out, I discussed the speed issue with Scott and he suggested a possible fix was to replace the tooth belt drive wheel on the motors with a larger diameter one.  I have larger toothed belt drive wheels but haven't installed them yet.  Scott improved later run Sunset diesels with all-wheel electrical pickup and independent electronics in B units, but I don't know if the speed issue was addressed by changing the drive belt ratio.   As an aside - an O scale E7 with the same drive train as a similar EMD F unit would run slower since E units have 36" wheels while EMD F units have 40" wheels.

Last edited by Keystoned Ed

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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