Forums

Model S options

Model S options

Let's discuss what options we need in the model S.
I can start by listing some luxury car essentials:
1. Rear view camera
2. Parking sensors
3. Adaptive cruise control
4. Highway lane departure sensors
5. Headlights turning with a turn of the wheel
6. Premium sound with capability to store MP3 songs
7. DVD video for back seats
8. Tire pressure sensors

Also looking for some electric car features like:
1. GPS to show electric driving range radius
2. Temperature of the batteries
3. GPS to estimate charge needed to reach destination
4. Instant efficiency measure of some kind (similar to instant mpg)

jerry3 | November 11, 2012

pilotSteve,

You can't trust any gauge at a gas station, tire store, or car dealer to be within 10 psi of the correct pressure. Get a good pressure guage such as 50406
http://www.racerpartswholesale.com/product/LAR_50406_Longacre_Quick_Fill...
or model 50404
http://www.longacreracing.com/catalog/item.asp?id=217&catid=8

With TPMS you should be able to adjust the setting so that you are alerted when the pressure drops more than a couple of PSI from the setting you wish to run it at. When it alerts you can then visually inspect the tire (assuming you don't have access to your own gauge and add pressure until the alert stops. Unfortunately, the default for TMPS is 25% low. By the time the tire loses that much pressure, it's already degraded.

mrspaghetti | November 11, 2012

@jerry3

Thanks for the recommendations re: tire pressure & gauges. I'm thinking of ordering The 404 above and keeping it in the glove box.

pilotSteve | November 11, 2012

@jerry3 - thanks for your recommendation and always insightful tire information. I've learned more about tires, wheels, suspensions, etc. by reading your posts that any other source!

I also bought the 404 as its time for me to have a precision gauge not my dimestore cheapie!

Brian H | November 11, 2012

Indeed‼ S/b standard owners' equipment. HOWSOMEEVER -- Keep in mind the temperature and pressure changes caused by driving/parking! A "proper" setting while cold may turn into serious overinflation after an hour at 70 mph. Or sooner.

jerry3 | November 11, 2012

Brian,

100% wrong. Tires are designed for that. The only pressure that is important is cold-first-thing-in-the-morning-before-driving pressure. That's why, on the sidewalls of the tires, the maximum pressure is stated as being maximum pressure cold.

Driving will cause the tires to flex which heats up the tires and increases the pressure which reduces the flexing which reduces additional heat build up and so on. Eventually the tires reach a point called "thermal equilibrium" where the heat gained from flexing is the same as the heat lost from cooling.

You have two choices:

1. Put enough air in the tires to reduce the heat build up.

2. Put less air in the tires and have the tire built up the pressure on its own.

In either case the tires will eventually get to the same pressure, but if you have chosen #2, the tire temperature will be far higher.

Heat, not pressure, is what kills tires.

You can tell that you are doing it correctly if after an hour or two of highway driving the tires have increased no more than 8% to 10% (If the day gets much hotter, as it does in desert conditions, there might be as much as a 15% increase. More than that and you need to figure out what's wrong--often it's too low of a pressure to start with.)

The absolutely worst thing you can do to your tires is to let pressure out of a tire that has been driving for a while and has built up heat. That will just start the flexing cycle all over again and cause the tire to get even hotter--perhaps so hot that the tire will start to devulcanize or even catch on fire.

Brian H | November 11, 2012

Yes, I guess I was thinking of the case where a driver comes off the freeway and checks the pressure, and compares that to the "cold" recommended. Or reinflates a low tire (just off the freeway) to only the "cold" pressure.

Mark E | November 12, 2012

I have a tyre pressure gauge & compressor in my garage - that way it's easy to check the cold pressures before driving off.. Not expensive to do and worth it.

TV | January 22, 2013

You can choose from one of ten different voices, that you can pick from the screen. And they all have their own way of hooking in with the GPS as well:

1) Incredibly sexy voice (interactive)...what Siri should have been. Maybe Michelle Pfeiffer just waking up..
2) Arnold Schwartzenpuffer.
3) Sean Connery
4) Morgan Freeman
5) James Earl Jones (not sure if he's available...has he "moved on"?)
6) Jack Nicholson
7) Ian McKellan
8) R. Lee Ermey
9) Anthony Hopkin
10) John Malkovich

Pages