Mike sent: I just ran some numbers, and I think it is important to realize that you > are essentially talking Tesla P85 or P85D levels of performance.
No. I'm not. > I wasn't sure what Corvette you were talking about, so I chose a > relatively high end, but stock model. I used the Z06 as an example. > Nope, just a plain ol $53,000 Corvette. > The Z06 is about 3500 pounds stock. Get rid of that heavy supercharger and the weight gets down to a more reasonable 3300 lbs As a high performance EV, it will probably gain about 500 pounds, so a > total weight of 4000 pounds. The Z06 has a 0-60 time of 2.95 seconds and a > quarter mile time of 10.95 seconds. > Again, I'm not competing with a Z06. Does your wife need 650 hp? I would venture to guess that most wives would be just fine with the Corvette's stock 400 hp. > You will need power similar to the 650 hp of the stock Corvette. The > Tesla P85D has over 700 hp for 4600 pounds, so in the ball park. 4600 lbs!?! That Tesla is a heavyweight pig! ;^) > That 650 hp is about 485 kW. With a battery voltage of 400V, you need > 1200 amps from your batteries, through the controller, and into your > motor(s). That is serious power! > While we differ on exactlu how much power is needed, we both can agree that this won't be a low power endeavor. > That is high end Tesla or high end drag racer territory. Systems like the > Leaf just don't have the power you need. I thought I mentioned that initially. Maybe I just thought it and didn't type it. > The Leaf system, for example, is only 107 hp or 79 kW. Most batteries > don't have the energy density to provide that kind of current and power. > The small format cells used by Tesla have much higher current capability > than most EV cells. > This is the kinda info I need. I don't know squat about EVs and would rather not spend the time learning right now. If someone handed me a "cookbook" on how to do what i want I'd grab it and be on my merry way. > Another point: While you might not need the Tesla range, a significantly > smaller battery might not be able to provide the same power levels. Larger > battery packs can provide more power than smaller packs. > Hence the $7k initial battery pack and $5k upgrade John Metric described to me. It's EASILY worth an additional $5k if it means the difference between good performance and great performance. But what I don't want is to overpower the stock Corvette drivetrain and have to keep replacing parts. I have done that in the past with my race cars and I now have more important problem to solve than creating unneeded new ones. > Finally, you need to figure out where to put all the cells in a body that > doesn't have much space. Like I just wrote, if they can fit ;em in a Miata surely I can fit em in a MUCH larger Corvette. > Ideally, for best handling, you would like to get them in the floor. That > lowers the center of gravity. It might help with space issues too. > Agreed. > Personally, I would be looking at Tesla parts, rather than Leaf parts. > They are a much better match with your needs. If using Leaf motors, you > might need 3 or 4 motors. However, the Leaf battery can't provide the > necessary power. > Not sure about the form factor of Tesla stuff. They use two motors laterally placed. I need two motors placed lineally. I picked the C5 Corvette as a donor car to get the performance suspension, ride and drive they come with from the factory. > Finally, I can't resist a comment about your business plan. I can't > really comment on how well the plan will work with the target market, since > that is so far outside my experience. I am an engineer (with a Tesla P85 > and a home conversion), and don't have any concept of vehicles as fashion > accessories. However, I do know that you aren't the only person with that > target market in mind. There aren't that many people that can drop that > kind of money, so you have to find some way to stand out from the others > trying to market to the same few. > Again, uniqueness is what I am selling along with an attractive body style. If my target market neighbor buys one of those other cars, that increases the chance they will select mine. Who wants a car just like your neighbor?!? > Are any of your advisors investing their own money in the project? That > is one way to judge their confidence in their advice. > Nope. I was a bit disappointed in that as well. But they see over a dozen potential business owners every week or so. And since 90% of all businesses fail, they are not in the "low odds gambling" business. And someone incompetent in running a business could easily fail using the best business plan in the world. > Mike > P.S. The Tesla Model S P85D with ludicrous mode would still beat the Z06 > in 0-60 and quarter mile times. Sorry, I couldn't resist 8>). Not from the numbers I have seen. But the bottom line is "Who cares?" I know my target market couldn't care less. Most would consider racing another car at least crazy if not downright stupid and irresponsible. Again, different perspective than we have. Besides, if I want performance I'll get a motorcycle. Funny, I read about complaints from Tesla owners that they couldn't outrun cars that they thought they should outrun on paper. Not in initial acceleration but in passing power or what we call a "roll on". Guess they shoulda bought an ICE! Sorry, couldn't resist. ;^) -------------- next part -------------- An HTML attachment was scrubbed... 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