EV general discussion
- Thread starter Ricochet J
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I've got a few shares so I'm interested in the Model Y and the improvements over the TM3 especially as I may order one to replace my TM3 at the end of next year. Watching the Munro vids on YT you can see where they got some things right and other areas still needing improvement. That cast rear is in sections currently moving to a single large casting will improve it further. The TM3 rear end was a bit of a fudge with many parts welded together so the TMY rear is now almost elegant despite the current join.
Either that or he just endeared himself to all the pickup truck republicans that will be buying Cybertrucks next year
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Soldato
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and really expensive...
Are cast sections common? I thought most were pressed now?
Soldato
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Yes they are in local areas to tightly control geometry and stiffness. Tend to be a brittle fracture so not as as energy absorbing.
For me Tesla can be argued as appropriate for those trades as the rear motor locks out anyway so the body can’t absorb as much energy in rear impact and punching a hole in a plastic fuel tank isn’t a concern. Might also help manage NVH from the proper hatchback opening and the bonkers size glass roofs with limited cross beams. Boot is not like the model 3 so they have made this part of the car on the Y do more work and happy to pay for it to improve vehicle attributes.
For me Tesla can be argued as appropriate for those trades as the rear motor locks out anyway so the body can’t absorb as much energy in rear impact and punching a hole in a plastic fuel tank isn’t a concern. Might also help manage NVH from the proper hatchback opening and the bonkers size glass roofs with limited cross beams. Boot is not like the model 3 so they have made this part of the car on the Y do more work and happy to pay for it to improve vehicle attributes.
yes just watched the casting one https://www.youtube.com/watch?v=KVGvwLnNyF0
it would be interesting for munro to compare their manufacturing solution against volkswagen MEB platform say ,
which looks pressed/welded https://www.youtube.com/watch?v=vRYK26Fn9Uo ...
wonder if the chinese tesla factories will have aluminium casting tech.
[was it nissan who made some comment about a £30m body press in the uk ... might be something similar for ice]
Well Munro are the perfect people to tell you that so long as you buy there final final costing report for a hefty sum. Once perfected and scaled for production I assume they plan to make saving over the multi-stage construction of a more traditional rear end. They certainly couldn't of done a worse job that the Model 3
According to the earnings report they are already profitable on the Model Y.
Becoming more common on cars. I think my previous i3 had large die castings at each corner to locate suspension components.
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Soldato
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The carbon body “life cell” and running gear below makes the i3 a little unique in that regard.
Underboss
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have you heard about the Tesla Roadster ?
apparently quickest production car, and its not a petrol !!
0-60 in 1.9s, range of 600 miles + top speed over 255 MPH?
and cheaper than a Bugatti !
apparently quickest production car, and its not a petrol !!
0-60 in 1.9s, range of 600 miles + top speed over 255 MPH?
and cheaper than a Bugatti !
Underboss
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Where have you been for the last two years Shi? 
Its not in production yet and there are others looking to replicate that performance (but for for £250k mind) like Rimac.
It should be said that it’s relatively easy to make an EV have a low 0-60, even a leaf will embarrass much faster cars in traffic light drag races to 30. High top speeds are more challenging as most have single gear ratios. Weight in the corners poses the biggest problem.
Its not in production yet and there are others looking to replicate that performance (but for for £250k mind) like Rimac.
It should be said that it’s relatively easy to make an EV have a low 0-60, even a leaf will embarrass much faster cars in traffic light drag races to 30. High top speeds are more challenging as most have single gear ratios. Weight in the corners poses the biggest problem.
yes it will, it has a 200kwh battery pack...
Underboss
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sorry im just really getting involved with EV as im getting one next
theres another one (cant think of the name) says 1000 mile range)
theres another one (cant think of the name) says 1000 mile range)
Yeah, being brittle is why I thought they'd largely been abandoned. It does make sense doing it where geometrical tolerances are crucial although I'm assuming a forged and machined part would be superior.
looks like tesla had (past tense) someone particularly expert in casting, patents etc
https://www.foundrymag.com/molds-co...9/tesla-is-turning-to-diecasting-in-a-big-way
can't but believe that vw would have invested in casting tech had it been justified, looks like they converted an existing production line for MEB, maybe for their next generation, there will be casting, but, with their mass production, they would need to ultimately deploy, advanced casting to multiple factories.
https://www.foundrymag.com/molds-co...9/tesla-is-turning-to-diecasting-in-a-big-way
can't but believe that vw would have invested in casting tech had it been justified, looks like they converted an existing production line for MEB, maybe for their next generation, there will be casting, but, with their mass production, they would need to ultimately deploy, advanced casting to multiple factories.
Soldato
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its cited at 200kWh pack, which is insane. But battery tech day is coming.
Same as any car, did you know the I-PACE ring taxi can do more laps (4-5) on a charge than a tank of fuel Project 8 or F Type SVR. (Dry after 3)
Soldato
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don’t forget - Castings are often machined afterwards and hence offer the exact same precision.
Yeah, I was referring to the removal of the brittle quality and generally an enhancement in strength whilst preserving the same precision in tolerances.