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Don’s Tesla powered Cobra

Here is a quick look at an awesome Tesla powered Cobra that recently hit the streets in California.

This car features a custom chassis built by the owner, and a Tesla P85 drive unit controlled by our T1-C controller.

The front suspension is Mustang 2, chassis and rear IRS arms fabricated by Don and Dustin at AG Sand Cars.

Rear tires 335/30 ZR 18. Front tires 275/35 ZR 18. Axles feature Porsche 930 CV joints race prepped in and out from mirage racing products.

Will wood front and rear disc brakes. Manzanita Micro Charger FC 50 charger.

Don is currently using Enerdel batteries and the car weighs only 1840 lbs.

Here are some videos of the car in action;

 

 

 

 

 

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A look at the Tesla powered EV-Controls 818

Many people have been asking for more details on our 818 development car, so this post will give you a quick look at what went in to building it. In February 0f 2016 we took delivery of our 818C kit from Factory Five. we had already been working on gaining control of the Tesla drive unit that we wanted to use in the car for a while at that point.

Here are some pictures showing the build process and general layout of the car. This is not intended as a tutorial or guide, just a look at how we did things.

We planned to use two complete Chevy volt battery packs and a large Tesla rear drive unit, so the first step was to figure out how these components would be laid out in the 818 chassis, which was designed to accept Subaru running gear. We ended up managing to fit everything in the chassis without any radical frame modifications.

We did not alter any suspension pickup points, or the main tube structure of the frame. We had to modify the front and rear sections of the frame to accommodate the batteries and motor, and remove the Subaru motor mounts.

Our final layout had all the batteries mounted very low in the chassis, and outside of the passenger compartment, which was important to us from a safety perspective. We used the original steel mounting plates from the Chevy volt battery pack assemblies, and built support structures from steel tubing. We then welded the mounting plates to the chassis. We are running the two Chevy volt battery packs in parallel, and using the BMS from the volt packs to monitor and balance the cell voltages. We have a main disconnect accessible from the drivers seat in the car that can break the circuit for the packs in case of a problem.

Most of the HV parts including contactors, HV cabling and terminals were sourced from EV West. There is a J1772 charge connector located where the fuel filler would have originally been, wired to the Chevy volt 3.3Kw charger.

Here is a look at the frame modifications from underneath the car;

We used spindles from a JDM Subaru STI, along with the large disc brakes from that car. We had Tad at www.driveshaftshop.com build some axles using the tesla inner joints based on measurements he has us take. They fit perfectly the first time and have given us zero problems in  5000 miles of use, including some 9 second quarter mile passes.

We first drove the car on the street in July of 2016. At this point we had control of the inverter using some hardware we had developed here.

There are 2 cooling systems in place, one for the inverter and battery charger, and another for the batteries. Our T1-C controller turns on the cooling pump and fan for the inverter and battery charger based on temperatures it reads over CAN from the inverter, or charger (depending on which is active).

We are using a battery charger and DC/DC converter from the Chevy volt at the moment. The T1-C controller controls these over CAN. We put about 2000 miles on the car during the fall and summer of 2016, including running a 10.1 second quarter mile in the fall. We did a range test and managed 158 miles (200 km) at 70 mph on the highway. Over the winter of 2016-2017 we disassembled and repainted the car. We also moved our control systems to some new hardware that we now sell as the T1-C controller.

The car has excellent handling with an extremely low center of gravity, and unreal acceleration. Traction is excellent in particular after switching to R compound tires.  The response from the electric powertrain is unlike anything that can be achieved with a gasoline engine.  The car also has extremely effective regen, with it weighing 2400 lbs less than a typical Tesla model S. The T1-C controller activates the brake lights during regen and this is absolutely necessary for safety.

In 2017 we refined and improved our controller and experimented with modified inverter firmware. We were able to run an impressive 9.82 second quarter mile time with these improvements in September of 2017.

The car has been mechanically trouble free so far, and the battery packs seem to perform as well as ever.

 

 

 

 

 

 

 

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EV-Controls 818 runs a 9 second quarter mile!

We went back to the track this past Saturday with the Tesla powered 818 and ran a 9.86@ 129 mph.

We drove the car 35 km to the track and then made the 9 second run on our first attempt.

See the videos and time slip below. We are using a modified version of the inverter firmware that produces 400KW (530 hp).

The car uses our T1-C controller and we have put almost 5000 trouble free km on it this summer.

The inverter is mechanically stock and the Chevy volt battery packs have been holding up great.

 

 

 

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Tesla powered Cobra race car makes a successful debut

Doug Yip and EPowerRacing of Vancouver BC got their beautifully built Tesla powered race car to the track twice in the last month or so, and reports both outings went very well.

First time out he qualified 5th in a 27 car grid, and this was with conservative power settings. He is using our T-1 Controller. Check out the in car video from the second track event below.

Nice work Doug!

https://youtu.be/onPaceYswN4

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EVControls T-1 and T-1C now available

After several thousand miles of on road testing, combined with track and dyno testing, we are now ready to offer the controller we have developed for the Tesla drive unit for sale. See the product pages for details on the two models we are offering.

Our test vehicle (FF 818, which has been in daily use on the street with this controller since the summer of 2016) has run as quick as 10.1 in the quarter mile and currently produces 470WHP with Chevy volt battery packs. As far as we know this is the quarter mile record for a Tesla powered vehicle.

We continue to add features to the controller, and with field upgradeable firmware these updates will be available to any existing customers.

 

 

 

 

 

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EV Controls 818 runs 10.1 second quarter mile.

On October 2 2016, we took our Tesla powered 818 to the local quarter mile track for some testing.

This car is our test vehicle for the controller we are developing that is now available. The car has a stock Tesla P85 drive unit and two Chevy Volt battery packs installed.

We managed an impressive 10.1 second quarter mile time at 126 mph. This trap speed was limited by gearing.

Check out the video below:

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Tesla powered 818 breaks into the 10’s

We went back to the track to test our 818 against a P85D, this time with drag radials.

The car had a Tesla S-85 drive unit installed, and two chevy volt battery packs.

We managed to break into the 10’s this time out, check out the video below.

This car is equipped with the controller we are developing for the Tesla drive unit.


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