October 22, 2020, 02:29:23 PM

Author Topic: Anyone ever build a EV?  (Read 302 times)

Offline kinger

Anyone ever build a EV?
« on: October 13, 2020, 11:15:50 AM »
Got a hankering for a Tesla swap in a car, curious if anyone has done anything with EV.  The instant TQ, no tuning, no leaks, fuel cost, and noise are seeming to be more attractive to me then before. 

Tesla is a bear to 'hack' they are trying to create very little use for salvage cars by locking them down but the aftermarket is booming now offering controllers and retrofits that allow you to use the parts.  You wouldn't be able to supercharge it anywhere but just add a aftermarket controller to plug in at any outlet.  The tesla battery modules and motors which is the reason why they are fast and why I would only be interested in using for a project are now hacked and can be used.  The 5kwh modules are 56 lbs and I am thinking at least 12-14 would be needed to get 150+ range and support the power of the 680 ft-lb motor (cradle weighs around 340lbs). 

Model S cars complete and running are now in the 20-30's for price, which is much cheaper then buying the components separately.  Essentially you need a donor car, a wrecked tesla, and about $8K in aftermarket parts and you can have a running driving performance EV. 

The entire subframe connects with 4 bolts to the car, so you would use all the tesla parts(half shafts, control arms, etc), they are wider then a lot of cars so probably need a Ronin fender kit in the rear or something. 

The controllers would control a front drive if you wanted to really get crazy and go AWD, use the telsa steering, etc.  Although this would take a significant amount of effort, a RWD subframe and using stock front would be much easier and add battery storage up front. 

Worst part is the batteries, mounting and the cost.  Trying to balance range with weight. 

I have seen one FD with the swap but its was really hacked and he was working to clean it up but it drove which is amazing to just get the motors to work for and get around the proprietary canbus. 

Me using my FD as a fair weather car anyway, I wouldn't need a lot of the creature comforts in favor of speed. 

If you go electric HVAC, PS, Brakes, etc it really adds up in cost just to have something we are used to having. 

Just curious on peoples thoughts.  :drive:
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline dap03

Re: Anyone ever build a EV?
« Reply #1 on: October 13, 2020, 11:47:42 AM »

Online MPbdy

Re: Anyone ever build a EV?
« Reply #2 on: October 13, 2020, 12:29:18 PM »
I've done a lot of daydreaming about building a performance hybrid primarily for drag racing as there's a TON you could do with a KERS type system like F1 uses.  Or even one of the hybrid turbos.  I work for a company that provides testing solutions for EV's including battery cyclers, battery emulators, high power sources and loads etc.  Our equipment in a lab environment can do functional testing up to megawatt scale on batteries and propulsion systems.  It is pretty dope. 

Anyways, I've gotten to see some cool shit including BorgWarner Turbo's factory in the Carolinas where they manufacture hybrid turbos and their billet components.  They have a turbo 4 porsche cayman with an electric turbo that can make over 20 pounds of boost in 6th gear part throttle on the highway.  They say it drives around like it has a big block in it. 

I also have dreamed about having a hybrid drive in the FD as it would be very nice to kill the engine and troll around in golf cart mode like the Mclaren P1 can do lol. 

The part that really excites me with a hybrid setup is not just the power boost, but also to be able to run it as a load and be active traction control.  That's the part that I would want to play with for drag racing.  You could basically make the car do the exact same thing every time by trimming engine performance using the electric motor to reduce power and fill in when needed.

These guys have a kit for the 911.

http://vonnen.com/hybridizing-a-car/


Offline Venom13132

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Re: Anyone ever build a EV?
« Reply #3 on: October 13, 2020, 01:16:22 PM »
i often think about going electric.  I think I would have to have a 2nd vehicle to do that to though.  I love the V8 in my FD.  I think I would purchase a wrecked tesla to do the swap.
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Offline digitalsolo

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Re: Anyone ever build a EV?
« Reply #4 on: October 13, 2020, 01:20:47 PM »
I looked at it about 4 years ago for the Mustang.   To get decent performance range (400 HP and >120 miles or so) was going to be like 35-40k dollars, whereas gasoline for 650 HP was 15-20k, so I went gasoline.

It's very intriguing though!
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Offline kinger

Re: Anyone ever build a EV?
« Reply #5 on: October 13, 2020, 02:22:31 PM »
These guys have a kit for the 911.

http://vonnen.com/hybridizing-a-car/

That thing is cool!!  Wonderful idea! 

$75k price....not so cool...  :o
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline Exidous

Re: Anyone ever build a EV?
« Reply #6 on: October 13, 2020, 11:31:56 PM »
Battery mounting and packaging is the big issue with a car meant for ICE. Now if you went Rob Dahm style with a tube chassis and FD skin it would be far more practical for packaging but not cost. Getting used batteries and drive units isn't THAT expensive. You don't need any of the Tesla control. The motors, batteries and inverters are relatively agnostic.
94 BB Sleeved gen IV LS7, MS3ProU with TC, RONIN 8.8 and LT's with custom 3.5"single to VAREX muffler.

Offline kinger

Re: Anyone ever build a EV?
« Reply #7 on: October 14, 2020, 09:46:00 AM »
Batteries are that expensive if you want any practicality you need 70+ kwh capacity especially if you want to road trip the car and can only plug into 110V outlets along the way and wait 10hrs plus to charge.  You are looking at min $15k and they are a wearable part.  If you can score a used battery pack at a salvage yard before they realize what they have its the only way to make it possible I think. 
93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline shainiac

Re: Anyone ever build a EV?
« Reply #8 on: October 14, 2020, 11:46:58 AM »
There's a guy semi-local to me who built a Tesla-swapped E30 convertible in his home garage. IIRC, he used Chevy Volt batteries. Looks like you can get a 18kWh module on eBay for ~$3k without bargain hunting.
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Offline kinger

Re: Anyone ever build a EV?
« Reply #9 on: October 16, 2020, 02:05:33 PM »
So good info, your correct, the Volt battery is a viable option because it actually gives the proper volts (360 and you need between 350-400) for the Tesla motor.  The issue is its good for maybe 35-50 miles.  This is no good.  The tesla packs you need 14 min not less like I was thinking.  At roughly $1400 a module ....So mega bucks.

Summary:
Volt battery using 1 of them will give 35-50 mi range and support power of tesla motor, weight around 450lbs, cost around $4000 - Supercar fun for 30 miles...
Tesla battery 24v modules from Model S, need 14 min, weight 850lbs, deliver 150-200 mi range, cost around $19,600 - super car fun and nearly supercar $$

One option I need to look into is a combo of the volt battery which fits in a tunnel of a ICE car nicely, and maybe 4-5 tesla modules.  Wired in a combo of series and parallel for proper voltage.  Gets you a pack in the $10,000 area with a mi range of around 100-125 mi.  I'm not sure if the BMS and other wiring if the two different battery chemistries would play nice or not though. 

So same conclusion - Batteries kill a EV conversion over gas buying all the components separately. 

I have seen a tesla model S with 200K miles on it go for $21K so that is the other option of harvesting one which is much cheaper then buying only the parts.  I just can't figure out if I would convert the entire tesla electronics, steering, HVAC, infotainment, etc to another car would it run?  I think Tesla can disable stuff using their "Your car needs to have authorized service" line.  I think the aftermarket helps here but how much would I NEED ($$) in addition to a donor T?  That is what I still need to figure out. 

I think it would be fun to buy a older T and run it as is and make sure I still want it, then work on justifying the swap or just leave it as is and drive it lol 

93 Touring, 6.3L, T56 Magnum, Mamo RPS BC2 clutch, FAST 90, NW 90TB TB, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights

Offline Venom13132

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Re: Anyone ever build a EV?
« Reply #10 on: October 19, 2020, 07:39:42 AM »
check out www.autobidmaster.com  I haven't purchased anything from them though.  They were as sponsor on a few Tavarish YouTube videos.  But It looks like you could get a wrecked tesla for a decent price on there.  I have been following some SS camaros just to see what they go for on there.
1995 RX-7 - LS1, T56: Feed wide body, Feed CF Side skirts, 57DR 18's, K-Sport coilovers, 99 spec\ tails and spoiler, SpeedHut, Aeromotive, TwinZ Diffuser
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Offline freeskier7791

Re: Anyone ever build a EV?
« Reply #11 on: October 19, 2020, 11:12:47 AM »
I would think a body swap onto a tesla chassis would be the easiest if you are starting with a wrecked tesla or something.  EV west does quite a few electric swap things. 


Remember the guys that would put like 300 laptop batteries together to make their Prius EV?  Is that still a viable option?  It's interesting how a gasoline engine swap is so much cheaper than electric considering the fact that it is mechanically more complex
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Offline largeorangefont

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Re: Anyone ever build a EV?
« Reply #12 on: October 19, 2020, 11:51:01 AM »
I'm interested, in another 7-10 years when this is all sorted out and cheaper. My reasoning for this is the same as it is for buying a Tesla today.

For the price uplift of a Tesla, I can buy an equal gas car and a lifetime of gasoline for that vehicle and come out money ahead.
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Offline petawabit

Re: Anyone ever build a EV?
« Reply #13 on: Today at 01:22:33 PM »
look up tsla_rx7 on instagram. He has one running