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MadaboutKitcars

This is a read-only archive of the old Madabout Kitcars forum. New posts and replies are no longer possible, but every thread is still here to browse and read.

K1 Attack

17 Jul 2019, 6:36pm
I spoke with Wilwood and contacted Brembo. Here is the new plan for brakes.

*Ditch the brake booster - It was suggested that an electric vacuum pump would likely not be able to keep vacuum under repeated heavy braking (track or aggressive driving)
*All manual setup
*New brake pedal - New pedal 7:1 ratio (340-13834). Old pedal was 4.6:1
*Master Cylinder - Tandem master cylinder 15/16 bore (260-13375)
*Adapter - Tandem master cylinder adapter (250-3677)
*Proportioning valve - 10mm-1 (260-12627)

Additional suggestions are welcome.
31 Jul 2019, 3:51pm
Following this thread with interest. I take it the motor came from a wrecked Tesla rather than new from the factory?

Can you give us a breakdown of how much the motor, batteries and control unit are going to cost. I'm asking because I'd love to build something more interesting than a Twizzy when we get forced to go electric.
31 Jul 2019, 5:02pm
I like the idea of all electric, manic levels of torque from the moment you put your foot down !
In the years to come there should be plenty of electric donor cars as well as affordable batteries and the charging infrastructure to make it a reality.
I don't agree with the eco side of electric cars, until all of the power stations are using renewables to generate the electricity it's a bit of a farce, but I suppose you have to start somewhere !
31 Jul 2019, 5:58pm
As far as costs...

The control units are still pricey because there are only a few that have hacked the tesla motor controls. I think you can find stand alone for ~$3000. You can find used (salvaged) Tesla motors for ~$3000. There are also companies that will get the used motors and the controllers and test them for you prior to shipment (this is what I did).

I have not purchased the batteries yet. I am still trying to decide between used Chevy Volt battery pack and new LG Chem 16S 2.6kWh batteries.
31 Jul 2019, 7:41pm
Fairly pricey, then.

I am struggling a bit to understand why electric motors for cars are so expensive when they have one moving part and are really just a scaled-up version of the one turning the drum in my £150 washing machine.

I had hoped that once the car industry started going electric the price of the motors would come down, but there's no sign of that happening yet.

I would expect the batteries to always be expensive, though, due to them containing so many rare earth minerals and heavy metals.

That also makes it a bit difficult for me to see how making us all drive ZEV's is going to save the planet when you have to dig huge holes in it to extract the ingredients you need to make the batteries.

Hey, ho, still really looking forward to seeing your build progress.
2 Sep 2019, 10:38am
Has somebody come up with an alternative way of controlling the Tesla units? Last time I saw anything on Youtube they were basically making it as difficult as they could, there was one guy who took the motor from a wrecked motor & put it into a flood damaged one, Tesla wouldn't let him even buy the plastic clips that held the door cards on, both cars had been marked on their database as write-offs so they wouldn't supply any parts.
2 Sep 2019, 3:16pm
I have found EV Controls, Zero-Ev, EVTV, and 057tech that all offer a solution to controlling the tesla drive units.