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Hi everyone im new on the Ev forum my name is Jan im from Holland and im working as a tig welder in exclusive yachts.

Now ive had the idea of making a dune buggy for a while now but recently i've been thinking of doing an electro motor build.

The thing im mostly wondering about is what kind of motor? i would like to do direct drive so no gearbox to keep a really low weight (spaceframe tubular body).

now should i put the motor shaft directly onto the differential or should i gear it?

And what kind of motor would be ideal for a light car?
Also been thinking four wheel drive maybe but im guessing that it would be a waste of energy if the motor has to spin two differentials instead of one?

Hoping to get some answers this way 馃檪
 

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You won't save any weight by going without reduction gearing, because you'll need a much heavier motor. The reduction ratio of a ring-and-pinion at a differential might be enough, if you are using a low-speed motor.
 

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Also been thinking four wheel drive maybe but im guessing that it would be a waste of energy if the motor has to spin two differentials instead of one?
The number of differentials doesn't matter much. If you split the power between two axles instead of one, there won't be significantly more loss to gears and bearings, as long as you use separate front and rear motors, or have a centre differential (if using just one motor). Much of the mechanical drag in a vehicle is at the tires, and it's more efficient to drive all four tires than to make two tires do all of the driving and have the other two just dragging along.
 

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Electric Sand car

Built 1996

Converted to electric 2015

WT 2300lbs

Range 50 miles

Motor

HPEV AC-51 88HP 108ft/lbs

Controller

Curtis 1251E-8521 144V 500amp w/regen

Battery pack

48 CALB 100ah LiFe Po cells 162V 15KW

Elcon charger 2.5KW 120/240V w/ J1772 charge plug

Orion BMS

EVIC display

DC/DC for 12V

091 VW bus transaxle

4 wheel disc brakes
 

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