DIY Electric Car Forums banner

1 - 13 of 13 Posts

·
Registered
Joined
·
25 Posts
Discussion Starter #1 (Edited)
Here's my 1975 911 widebody, currently has a 3.3 twin-plug motor with a 915 trans with LSD, it could get up and scoot. The blue pic is what it looks like now, after 4 years of work, and the red pic is what it looked like when I bought it 4 years ago.
I know I want to use a Tesla Drive unit, and I know I want at least 150 to 225 or so miles range, and I think I need the capability to quick-charge on road trips at around 100 miles ranger per hour of charge. I'm needing to know what kind of rectifier/controller/BMS/charge connector I'm going to need.

Any input you may have would be wonderful to hear, as this is how I learn best.


PS: Anyone know where I can sell a motor and trans? ;)
 

Attachments

·
Registered
Joined
·
25 Posts
Discussion Starter #3 (Edited)
Yes, in conversation with Michael already. I have a parts list but it's incomplete ( no drive axles or motor mounts,for example) and his conversions are designed for Level 1 , or at most 7.7khw charging. It's where I'm starting, though.
 

·
Registered
Joined
·
4,762 Posts
Here's my 1975 911 widebody, currently has a 3.3 twin-plug motor with a 915 trans with LSD, it could get up and scoot. The blue pic is what it looks like now, after 4 years of work, and the red pic is what it looked like when I bought it 4 years ago.
You converted a cabriolet to a coupe? That seems like a lot of work.

I know I want to use a Tesla Drive unit, and I know I want at least 150 to 225 or so miles range, and I think I need the capability to quick-charge on road trips at around 100 miles ranger per hour of charge. I'm needing to know what kind of rectifier/controller/BMS/charge connector I'm going to need.
At 300 Wh/mile, that's 30 kW, so I assume you want DC charging... that means no rectifier, but you need the components to communicate with the charging station.

What are you planning to use for the battery?
 

·
Registered
Joined
·
25 Posts
Discussion Starter #5
Didn't convert a cab to a coupe; the landau top was fake. It was the work of about 2 hours to peel it off with the help of some Goo-Gone Pro Power and a wide thin putty knife. I was shocked to find no rust under the canvas.


I was hoping to use the LG Chem battery set, if I can configure it for around 48kwh. Ultimately, I'd like to be able to plug in at home for overnight and do a quick-charge on the road, if I have a 250 mile range in a sub-3000lb car. If you've got any better ideas, I am all ears, as my only current investment is a book that hasn't gotten here yet;)
 

·
Registered
Joined
·
4,762 Posts
Didn't convert a cab to a coupe; the landau top was fake. It was the work of about 2 hours to peel it off with the help of some Goo-Gone Pro Power and a wide thin putty knife. I was shocked to find no rust under the canvas.
That makes more sense... and whatever the end result, ridding the world of a fake soft top is a public service!
 

·
Registered
Joined
·
4,762 Posts
I was hoping to use the LG Chem battery set, if I can configure it for around 48kwh.
LG Chem has made a lot of cells and modules. If these are the modules used in the Pacifica Hybrid, you will be paralleling modules for that capacity, so you'll need multiple sets of BMS hardware.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #9 (Edited)
I'm looking at these, and doing the thing he mentions in the blurb for the extra kw.


https://www.evwest.com/catalog/product_info.php?cPath=4&products_id=481&osCsid=ntcrrjl9jf64jv1lj6cptkg8g3


If I can get 225+ miles per charge, and charge for an hour or an hour and a half for another 125 or so, then I think I could get from Dallas to Rogers AR in around 6-7 hours rhather than a 225 mile drive, an overnight stop somewhere that has an overnight charging station or somewhere I can plug into, and the remainder of the drive the next day.


Ultimately, though, this is a 'nice-to-have', and if I don't have it on initial conversion, I will be ok as long as eventually I can upgrade to it.
 

·
Registered
Joined
·
445 Posts
What's the reasoning behind those batteries? It's $280/kWh, whereas a 2013+ Leaf pack is like half that if you buy the whole sled ($3,000-4,000). There's an 75kWh Model 3 sled on eBay right now for $10k, if you're willing to tie up that kind of cash for a project like this...

Considering a Leaf with 24kWh battery does 100mi, I think you might need quite a few batteries to clear 200...It seems that power is cheap, but range is not.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #11
What's the reasoning behind those batteries?
The main reason is that of all the 911 widebodies running a Tesla drive unit and controller, I have not seen any running Leaf batteries. I have seen Tesla, Chevy Volt ( which I think are LG Chem) and LG Chem.
 

·
Registered
Joined
·
33 Posts
Hello Mick

I was wondering where you would have the space to fit all those batteries for such a range in a 911?

Cheers,
Remi.
 

·
Registered
Joined
·
25 Posts
Discussion Starter #13
Hello Mick

I was wondering where you would have the space to fit all those batteries for such a range in a 911?

Cheers,
Remi.

Oh, heck if I know, Remi. I can put them anywhere they'd fit- over the motor in the back, in the back seat, up front where th4e gas tank used to be, glove box, under the dash, in the passenger seat ( dog would have to sit on the floor but oh well ).... ;)
 
1 - 13 of 13 Posts
Top