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Old 02-02-2009, 09:51 AM   #17 (permalink)
MechEngVT
Mechanical Engineer
 
Join Date: Jun 2008
Location: Richmond, VA
Posts: 190

The Truck - '02 Dodge Ram 1500 SLT Sport
90 day: 13.32 mpg (US)

The Van 2 - '06 Honda Odyssey EX
90 day: 20.56 mpg (US)

GoKart - '14 Hyundai Elantra GT base 6MT
90 day: 30.46 mpg (US)

Godzilla - '21 Ford F350 XL
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Quote:
Originally Posted by Christ View Post
Of course, given that CV axles are most efficient when working in a straight line (in a line that would be suited to a solid axle), you're probably losing that same efficiency gain b/c they're almost never straight.
If you're adding electric RWD to an otherwise FWD car you can save some coin or get more robust shafts with universal joints as rear wheels do not steer. Also universals shouldn't be run straight anyway (it keeps the needle bearings from spinning properly), so you'll be good.

IRS would be better, but not all vehicles start out with IRS and this conversion would be problematic for suspension mounts. You could turn a beam rear axle to a live axle, body-mount the motor and shaft-drive the diff to minimize unsprung weight, although a live axle adds a lot over a beam axle in a FWD car.
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