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I find it best to just rest one hand on the steering wheel with autopilot on. It provides just enough torque for it to know you're there. I used to keep both hands on and it can't tell if you have any hands on at all.

I've heard good things on other forums about the AR-1's for track junkies, as they're cheaper, have pretty good grip, and last longer than the other options. I haven't heard as much about the ones that are more suited for the street : Nankang NS-2R. They might work well for Autocross, but don't...

I found they don't care until you're beating them. Last year I just said I was in STU, because that seems like where it *should* go with just wider wheels. (I was only running 235 wide tires, and I still go dirty looks in BS)

I have a P3D, and a Model S 90D. The 90D had near perfect tire wear without rotating tires. The P3D wears more on the rear. I think the major difference is that the P3D uses different motors front and rear. The regen (and forward moving) force is stronger on the rear tires due to having...

I run 42-45 for efficiency, and 35-38 for comfort and grip.

I was considering getting the S007's mostly for street use when my RE-71R's wear out next year. I don't plan on autocrossing it as much next year. Have you been satisfied with the S007A for street use?

Tire rack has some decent cheap 18x8" wheels from their own TR brand that work fine.

This! is probably the most significant difference. I put some studless snow and ice tires on my cars before, and I won't do that again. There is too much tire squirm for me. But, for my wife's Model S, we put on the Nokian WR-G3 (or 4), and they're fine. They're more of an all season tire that's...

I've heard that clunking issue a few times autocrossing my car. I have 19x9.5" +35mm offset wheels, but 235mm tires. So, it's unlikely the tires hitting. Or more specifically, it's unlikely to be caused by wider tires.

Great, that means the new site is solar powered already!

My wife went autocrossing with me her second time last weekend. The advice that seemed to help her was, follow the course (that's why they say walk it a few times) and then add speed by trying to keep it tight (stay close to the important cones so you're not wasting distance/time going way...

Thanks again for the info. Please let us know if you hear anything about official classing. I guess I'll have to be more careful that I look at the recent rules. 265 width is clearly a lot better for us.

Any update on classing? I ran in B Street for the first autocross event, but I heard some grumbling about my wider wheels. So, I ran with BSP next event. I think now I'll register for STU, since I'm running narrow enough tires for AWD (max is 245 for STU), and the PAX is lower than BSP. I...

Because the 235's were lighter, cheaper, and probably more efficient on the road. And, I wasn't sure if this car was going to end up being my autocross car or not. But, I'll probably go wider next time, but that's mostly because they look silly stretched wide like that. They did perform very...

Yeah, I feel like doing a DIY aero wheel cover for the winter. Summer range isn't generally an issue, and I don't want to cover the brakes just in case. But, in the winter, warming brakes shouldn't be so much of a concern, and I need to make up for the lost efficiency.

I also purchased some Konigs from Discount Tire, and it came with the long nuts. I was very not happy. But, then I calmed down. Still, they are heavier, non-standard in shape, and stick out so far they look funny. I spent money on these wheels to save weight, and I didn't appreciate the added...

On my Penske's (on my Lotus), I adjusted the compression to 'more stiff' and it helped not bottom out on big bumps (made it smoother) while making the normal road a little bit more rough. My suspicion is that it's not a binary switch, and every high speed bump has some component of a slow speed...

@bwilson4web, How did it go today? Sorry, I wasn't able to get out there today. We had a few important things come up at work.

If I recall correctly, the 18" has more track tire options, and 19" has more autocross/street options. That's why I went with 19".

Just watched the video. That looks like cheating! I'm very interested in seeing what changes you make. I'm surprised you got the white interior just to rip it all out.

I'm looking at doing an autocross in a couple weeks. I have wider wheels on my car now. Is D Street Prepared the correct class to register in? I don't know how cars map through the modified classes. Does anyone have anything they can link to that explains this? When I read the SCCA rules it...

Hmm, I wonder if I can get work to pay for it. I need more "training hours". :)

But with properly design brake pads, the dust could come off and embed itself into the tires, thus allowing the tires to stop better. Or the brake pads could disintegrate into a large dust cloud, thus increasing the wind resistance and slowing the car down faster. Or you could make the brake...

Attaching a picture of my car with my wheels installed. The car is dirty but the wheels are clean. :)

Yeah, all the ones I linked in my spreadsheet are flow formed and reasonably light. Not sure if it's correct, but Discount Tire says Tire Load Capacity 1521 I remember seeing some other wheels that were a lot heavier with a load rating of around 2000 pounds. Not sure the value of that.

235/40/19 RE-71R I went with these wheels because they were cheaper and I got the tires and everything mounted there. https://www.discounttire.com/buy-wheels/konig-ampliform/p/61123 They ended up being a bit heavier than I had hoped, at 22 pounds balanced. But I think I'm still 6# less than...

I made this spreadsheet to help me decide. I got the tire sizes from tire rack and directly from Michelin and Bridgestone's websites. Tesla Wheels/Tires It's interesting that the revolutions per mile varies between brands. I also setup the standard size to be what the stock 20" wheels/tires...

I autocrossed my S 90D once with the stock all season tires, but I think I only got 4 runs in. I still managed to get to 50k miles before replacing them. Having AWD, electric motors and a very low center of gravity seems like cheating. However, being super long and wide (for a sports car) made...

Hacking up, or jacking up?

I agree with your post. I just need to point out that the Lotus Elise and derivatives are closer to 1800 pounds. I believe the stated wet weight is less than 2000 pounds for the NA versions. The newer ones with the V6's are obviously more, but it's still quite amazing how light they are...

Maybe it's up hill? It's just a make shift 1/4 mile track as part of a road course.

I feel like with the J screw adapter things from Tesla's kit, you should be able to mount the same sort of kit from the Model S, which would allow longer bars to be put on. I wonder how long until we just can order the J screws and then I can move my rack between my S and 3.

I wrapped my Model S to save the money. I didn't use a timecard to record things, but I think it took around 60 man-hours to complete. I think a fast professional should be able to do it in half the time, or do it at a higher quality for more time. :) So, considering you need to have a clear...

I agree. Sometimes I feel like I should put less grippy tires on my car to make things more fun. I'm pretty sure the Model 3 is faster at just about everything than the Elise. It's mostly just the steering feel and directness. Also, the Elise's throttle response actually seems faster than the...

Similarly, I'm looking forward to the day when I can replace my Lotus Elise with an electic vehicle. But, right now the Model 3 just isn't as engaging. I'm hoping to try someone's aftermarket suspension to see how much it helps, or maybe getting the Porsche Boxster when they release the all...

I think that's why you can't get it without the HW in current vehicles. But, directly to your question, you'd likely still have to pay for it, because it'll take time to recoup that money.

I have found Track Mode to make it much easier to spin in the snow. I found it was more fun in the really slippery stuff just to be in normal mode. However, I agree with Perry that it's generally not that risky to drive with Track Mode on in the streets. But, I've only done it a few times since...

I would also like to point out that changing out wheels is pretty easy to do, if you have the capability at home. So, swap, play, firmware update, swap back, test, swap back. :) (I just swapped on my summer tires from my winter tires about the same time as I got 8.3 and it's ridiculous the...

I'd also be interested if this effects the max regen capability too.

They generally advise connecting over Wi-Fi in order to get the firmware update.

That's a fair point, but I really want to know before I move, and I don't want to have to look at the display. Seems like a 2 stage warning would be really nice. :) Have a lighter (optional) noise for when the signal is on, and an alert sound when exiting the lane.

How wide were the 19" wheels that you guys tested with? Same 8.5"?

It seems like they're waiting to increase the power until after they've launched the Model Y. I wonder if it's related.

Looks like the Pilot Sport 4S in the picture. Also, that sidewalls look fine to me. It'll be interesting to hear about the handling. I'd be very careful while you have mismatched tires.

I have the P3D, and the stock tire size according to Tire Rack has 786 revs/mile. Each tire seems to have small variations within the same rated size between brands/tires. Here's the data I collected for the Bridgestone RE-71R and Michelin Pilot Sport 4S. wheel diameter, profile, width in mm...

Mine also only spray when at the bottom. I like it a lot. Works way better than any other system I've seen that sprays onto the windshield itself (including the Model S).

Your 255 tires are also probably about 2% smaller in diameter. It's quite possible that the power control from the 3 is limiting max torque by limiting what it thinks the wheel speed is. It'd be interesting to get tires that are slightly larger to see if they help the externally measured 0-60...

I was also thinking they may just be increasing the power for the rear motor for to a better understanding of the technology. So, the AWD cars may not get as much benefit as the rwd cars.

Who's going to test again when Tesla releases the 5% improved power?

Humorously, it's quite possible that the fastest wheel/tire combo would be 17" front with like 185 wide, and 18" rear with 205. That should allow for the lightest wheels and tires. Particularly considering that grip isn't the limitation, you could choose lighter, less grippy tires.