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http://www.teslamotorsclub.com/attachment.php?attachmentid=23100&d=1370283832 sorry folks , the tesla has the same peak torque as any other car you would drive on the street... the difference is where that torque is. its 440ft-lbs and it starts at 0mph,,,, and then when you get going 130mph...

GUYS GUYS GUYS!! when comparing the Tesla with other cars, it DOESNT make 4000ft-lbs of torque compared to the viper, Camaro, etc, 400ft-lbs of torque....... That dyno is a little misleading..... yes, the RPM is the rear tires.................. but more importantly, the torque is at the rear...

Sill a little misleading. They finally quoted and compared to a comparable piston engine. I wonder if it was from my posts? After all, its HP that will determine the "Torque" at the rear wheels at any vehicle speed. :) Now, the curves are still very inaccurate. look at the tesla torque...

As a general motor comment, usually adding "Poles" slows a motor down or electromagetically, gears it down. more power, less angular movement for a phase change. The only infinite gearing would be if you fed a sine wave current input where you would then be talking about microstepping a motor...

Its a general motor principle that power will fall off. generally, the back Elecromotive forces BEMF will always eat the motor alive at higher and higher speeds. sure you can always overcome the with more and more input power, but you then get into heat issues. There are eddy current losses...

Good, I think I've confirmed where you were coming from. I dont have enough knowledge in the current state of AC servos to make an comments there. I guess if the motor and controller design could provide a flat HP curve to 14,000rpm, it would be problem solved. Im curious as to the losses...

I dont quite understand what you are saying below. can you be a little more clear. what are you getting at? Is it you think that any kind of further reduction in the form of an additional selectable gear redcution to increase performance in the higher MPH ranges could be done by the motor...

EV vs piston engine is pretty close as far as torque available at power dump. most engines are rev'ed to 3k and the clutch is dumped. gas pedal management as well as clutch release dictate the slip of the tires for optimal traction and acceleration. with an EV, there is only one pedal, as...

I follow you here, but that is not really the question (which is getting more and more convoluted) I think its agreed that the tesla 8.3:1 reduction is almost perfect for the motor and drive electronics. my point was to get another gear in there , with a 80% rpm drop to not only take the top...

no he is refering to the gear box alowing the available power of the motor to be utilized by the tires at any vehicle speed in question. Forget about motor torque for a minute, its the torque at the rear wheels at any vehicle speed that is being talked about. to maximize this, max power is...

its not really a problem . the rotor mass is still yet a fraction of what a combustion engine inertia would be. a sequential gear box with a 80% rpm drop would be more than achievable. again, this is what the porscheGT3 cup car does all day long with near 500hp and at 7-90000rpm. a one gear...

Good point. probably possible. with electric motors and those kind of small resonance characteristics due to the motors natural frequencies could be an issue with gears with some backlash. so, a flywheel could be usefull there. I dont think it would solve any issues with the changing of...

Good point as I mentioned about the dramtic drop in rpm required for a dual speed gear box. However, there is no rule saying that there couldnt be 2 additional gears after 80mph to select :) So, then the motor would be shifted from more like 9,000rpm ending up at near 7000rpm which is the...

I dont really think that is the issue at all. The drive train doesnt know or car what is driving it. The torque/hp curves are not all that different. Even the engine vs motor speeds are not all that different. However, someone did bring up a good point. sure, motorcycle, porsche GT3cup cars...

I guess it depends on what your definition of "a lot" is. :) . In our racer, 20mph segments from 60mph to 120 are anywere from 2 seconds to 4 seconds when you measure the time it takes to get from 100 to 120mph for example. In a racing application, I dont think 7 or 10 seconds full throttle...

I think anything that Tesla can do to compete against the supercars is not misguided. Certainly, they need to work out a few other things first before they start looking at revolutionizing racing :) I dont think overheating would be an issue if the car was to spend a little more time at its...

As an avid SCCA Pro/Club racer, I’m getting very excited about the possibility of racing an electric racer! Right now, I currently race a car that was not ever thought of as being a car with "race potential" but it does very well and has logged over 110 race days! (and its still driven to the...

I think its great they are getting away with only one gear for simplicity sake and reduced costs and weight. If you look at their power curve for the Roadster, it starts to fall off at 6000rpm. It doesnt end up with lot of power at 14000rpm, so all your accelleration potential is down at...

Has anyone ever seen how long the Tesla Roadster can last at near full power? (i.e. Track use?) I would think that it possibly could be use on the race track at near full power for about 20-30min, but I wonder if the eletronics and batteries could survive.

Part of the confusion of the gear box discussion is a basic misunderstanding of what really accelerates a vehicle. Tesla has designed a single speed gear reduction that uses a near 8:1 ratio. Coincidentally, this is a very common final ratio for most high performance piston engine cars in 1st...

They should use HP to be able to compare the curves to their piston engine competition. They should also pick a piston engine comparison that is in the same peak HP range as well. otherwise, its a little misleading in my opinon.

The only advantage that the "Torque pedal" would have, would be in the areas of modulating wheel spin. Reaction time would be no different. light goes out, dump the clutch. :) mk