Re: Electric Elan
Posted: Thu Jan 20, 2022 5:23 pm
1. Did you modify your existing Elan Tacho or buy a new one to work with the hall effect sensor?
2. Did you modify the fuel gauge to use the PWM signal - I was thinking of adding a current amp to take the Orion BMS output of 0-5V for remaining battery capacity to drive into the bimetallic strip heater in the Elan fuel gauge.
3. Is your front to back trunking metal or plastic?
4. Did you use 70mm² HV cable?
5. For instruments did you take motor temp from the original coolant sensor or BMS?
6. Are you using full Hyper9 torque or did you throttle back to protect the drive train?
7. Or what did you do to strengthen the drive train - i plan to use solid driveshafts - have you broken anything yet?
8. How do you control the charge current between 10A and 32A for Type 2 and granny charging? Existing chargers do not seem to have a control for this unless it is done over CAN bus
9. Do you detect low temp (for charging) using BMS or a separate thermostat?
10. Did you use Tesla 3 way coolant diverter valve or something different to divert around the radiator?
11. What tyres are you running?
12. Where did you get your batteries from?
13. Please can I come and see your car?
Good questions !!
Great spec - V close to what I'd do if I'd done it again, I'm just very 'tight' on weight .. less is more.
Main area I'd differ is to use simpBMS rather than Orion. Orion is very good and well respected but simpBMS works so well with tesla modules and their existing PCB's, data bus, connectors, bleed resistors - so less less wiring, less rewiring etc Less to do and less to go wrong < I learnt the hard way previous project that less is more as more stuff is more to go wrong
As for tuning motor to be like a twinc ... good luck : (totally different profile - I still getting used to its nuances and Software tuning)
1. existing tach + https://spiyda.com/ (plus hall sensor and magnets - bonus question: how many magnets ??? < think about it .. I didn't
2. No simpBMS drives it with PWM
3. 5 x Plastic (3 black conduit for + , - and signals ) 2 john guest for Flow and return
4. yes from zero ev
5. Motor temp now shown on Hyper9 display . BUT Future mod is to use the existing Elan temp sensor (bulb on pipe) strapped to Motor with Ali block < do this similar range eg 0-100degC. Otherwise SimpBMS shows SOC, currents, battery temps. I Plan to use the Top 'oil pressure' gauge driven from something .. experimenting with syringes to go mech to pressure < future work. I dont have a 12v meter (but I dont want to cut any holes as dash / interior is almost 100% original) ... Q: how to get the oil pressure gauge to show 12v
6. Full 100% forward and 30% backwards. BUT .....
7. with solid CV drive shafts / new diff outputs /rebuild / sprint strengthening bracket . In gears 1 and 2 tyres 'release' the excess torque (same in 3 & 4 if damp !!) < future plan fit an LSD. But NOT wide tyres ). Nothimg broken yet, BUT some bolts did work loose !!
8. ... guess what ..... simpBMS and a switch (see pix inside boot).
9. ... guess what ..... simpBMS
10. I had some prototype Fan-coil mixer valves (which I designed for Satchwell 10 years ago) .
11. Firestone Multihawk 155/80 (on car when got it) .. OK but might try Firestone rain masters next (Im not into massive grip - less fun
12. Met a local guy via ebay who bought a whole model x pack and sold off what he didn't need (for his e-boat project). Nice guy now associated with https://www.secondlife-evbatteries.com/ Also check all the DIY ev UK facebook groups, Zero-EV ECC etc BUT make sure you get matched modules - ALL out of same car and all at a similar SOC (good modules hold charge for months/years) MS 85Kw seem to be longest lasting... some even go UP in time
13. Sure - about 50 miles away Poole, South Coast, DM me
I hope this helps and answers - sorry I can be a bit flippant .. lifes too short to take it too seriously
Cheers
Mark