[got_bar_work]

Look at the white zombi drag car its nuts
It has 2 motors and the most crazy batt everr
It runs 10s at 1500amps
The pack can do 300amps but the dato that drives to the strip cant put the power to the ground because its still leaves

[losfer]

off the top of my head i think they are 2800 rpm its been a while since i looked , and its almost at the completion stage but we have had issues with the BMS (battery management system) which has prevented us from road testing it.

we use a zibo motor.

ok the thing about those insanely fast drag cars that run electric motors is this ...

the motor isnt designed to run 1500 amps , so at this current the motor heats up very quickly and needs a considerable time to cool , it also depletes the batteries very fast , the motors lifespan is also greatly reduced.

[got_bar_work]

Thats the beuty of the electric motor
U can run them normal then just ram like 4x the power into them for short bursts
I think that car can do about 100miles of normal driving

[losfer]

yes the motor speed controller can be programmed to limit the amps , but you need a controller that can handle it . for example a 1000 amp controller is 3-4 times the price of a 500 amp controller, so the same as anything it all comes down to $$$$.

[JrZook]

What brand of speed controller and cell balancing units are you using in them at the moment?

[missmyljdaze]

A few years ago, I read about an electric conversion done to a suzuki hatch in (I think) South Australia

The bloke didnt use batteries- he used banks of capacitors stored in the engine bay, in the storage space under the rear seat and where the fuel tank and muffler used to hang.

I am a bit hazy about why he used capacitors- I think the theory was they charged/ discharged faster than lead-acid batteries
(and I think the caps were a freebee salvaged from his work or something along those lines.

anyone else shed some light about this particular conversion- I have never been able to find the link to it again.

stephen.

[Jackson]

Joshyboy26 wrote:

Jackson wrote:

Getting hydrogen from water is high school science experiment, most of the hydrogen produced comes from methane.

How do they split methane to get H2?

Pump in some steam.

CH4 + H20 --> CO + 3H2

[losfer]

JrZook wrote:

What brand of speed controller and cell balancing units are you using in them at the moment?

the cell balancing is by elite power solutions , and the controller manufacturer escapes my mind atm , can look into it for you...

[zukenutter]

I have thought that 4 x hub motors bolted to a solid beam that replaces the Sierra beam axle would be cool and fairly uncomplicated.

I know nothing about vehicle sized hub motors but thought it would be cool for a 4wd

[got_bar_work]

Hub motors will be the best thing EVER to happen to 4wd
No more stupid ic to go wrong over heat rebuild
No diffs to blow
No tail shafts
Unlimited steering lock
Can program so the motor can generate enough power to break anything
Regen breaks

[zukenutter]

^^ exactly my thinking

[Teracis]

Add to that list,
4 wheel independent steering (you might want to crab you know)
4 wheel independent torque control
You could also program in some sort of traction control with it so it wouldn't spin any wheels.
You could change the COG of the vehicle drastically (this could be good or bad depending on the layout of the batteries)
You would be better off replacing the solid axles and making it like the mars rover for clearance.
The hub motors are part of the un-sprung mass


It's not going to go very fast though remember.

[Dr_Snapid]

Having the motors unsprung mass is a killer at speed though. The weight of hub motors is a negative once you are going fast

But man I wanna try an electric conversion.

For a road car (or 4wd which will be used on hwy) I think I would run the motors inboard (where your diff centre would be) and use an independent setup with CVs I think for road manners. It's a shame though, hub motors would be so awesome when crawling. (not sure about water crossings LOL). Inboard motors can also be linked (like a difflock) so when you get all crossed up on a steep ascent, you can get the torque from the other motor to the wheel on the ground. (assuming your 4 motors, one for each wheel, arent strong enough when only 1 or 2 can get traction)

Also, I'd run only a small range worth of batteries with onboard ICE generator (LPG?). The gen would need to produce roughly the power required for cruise, with extra power from the battery for accel, batteries charging during decel.

I like the hill descent / cruise control etc possibilities that an electric could potentially have.

[got_bar_work]

I had a thought of bolting a motor above each center then chain or gear to pinion

[Dr_Snapid]

But how to keep the chain tensioned...

I have seen a 4wd on the net somwhere that had chain drive to each wheel separately. Man it looked wild! It had swingarms not unlike a moto

You could adjust the car to make it level on really steep slopes LOL

[christover1]

Dr_Snapid wrote:

But how to keep the chain tensioned...

I have seen a 4wd on the net somwhere that had chain drive to each wheel separately. Man it looked wild! It had swingarms not unlike a moto

You could adjust the car to make it level on really steep slopes LOL

Africar maybe.
That was a very cool car.

[atari4x4]

christover1 wrote:

Dr_Snapid wrote:

But how to keep the chain tensioned...

I have seen a 4wd on the net somwhere that had chain drive to each wheel separately. Man it looked wild! It had swingarms not unlike a moto

You could adjust the car to make it level on really steep slopes LOL

Africar maybe.
That was a very cool car.

Chainlink Extreeeeeeme & no we don't need a link.

I think this should be in good tech.

[JrZook]

atari4x4 wrote:

Chainlink Extreeeeeeme & no we don't need a link.

What's that? lol