[ausev] High torque or High RPM?

Josh Handel jhandel at ktomics.net
Wed Dec 5 19:24:03 GMT 2007


Howdy all,
   So I've been piecing togeather my "master plan" and I came to a
perverbial "fork" in the road.   The vehical I am building will be based on
a Lotus 7 Clone and is extremely light; so light that many builders of these
cars use Motorcycle engines & Transmissions in them AND still have a heck of
a fun car to drive.   This brings up a few questions.

1) Motorcycle transmissions are designed for higher RPM & Lower torque.
Given that I have the freedom to choose my transmission for my roadster, is
there any EV advantage to going with a transmission designed for RPM or a
traditional RWD Standard car transmission..

2) How much "extra" weight should I account for in an EV based car (yes its
all dependent on battery but a ball park).. Lotus 7's can be built ICE and
weight in at under 1200 pounds.. I am sure I get 2 ~ 300 of that "back" for
loosing the Gas engine, but how much MORE do I loose to batteries,
controllers, etc?

Thanks
Josh
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