Originally Posted by Tcoat (Post 2859650)

Do not use GPS as the benchmark for speed. They are only accurate to a few hundred yards and the transmission lag (they are in space after all) means what you are seeing on the speedometer and what you are reading on the GPS are not actually happening at the same time. Always believe the speedo over a GPS no matter how accurate they claim it is. If you have the same number it is more due to coincidence than reality.

Originally Posted by Shinigami301 (Post 2859713)

Interesting- but your view differs from this:

http://gpssystems.net/accurate-gpsbased-speedometer/

Originally Posted by Tcoat (Post 2859650)

Always believe the speedo over a GPS no matter how accurate they claim it is.

Originally Posted by Shinigami301 (Post 2859713)

Interesting- but your view differs from this:

http://gpssystems.net/accurate-gpsbased-speedometer/

Originally Posted by Shinigami301 (Post 2859764)

Certainly did not mean to irritate you with that, sorry if I did.

Originally Posted by Shinigami301 (Post 2859764)

Certainly did not mean to irritate you with that, sorry if I did.

Originally Posted by strat61caster (Post 2859775)

What do you need to accomplish by having a more accurate speedometer?

I'm actually curious now...

Originally Posted by Tcoat (Post 2859650)

You do realize that most of these questions are unanswerable with any form of consistency right?
Fuel consumption numbers depend on how and where you drive and there is no way to compare from person to person.
Do not use GPS as the benchmark for speed. They are only accurate to a few hundred yards and the transmission lag (they are in space after all) means what you are seeing on the speedometer and what you are reading on the GPS are not actually happening at the same time. Always believe the speedo over a GPS no matter how accurate they claim it is. If you have the same number it is more due to coincidence than reality.


The high beams are a separate bulb just like the old ones. It will blind oncoming traffic exactly the same any other high beam on a car.

Originally Posted by curiosul (Post 2859628)

Actually thinking about getting one. I test drove one (see my impressions here) but I didn't have time to notice/check everything.
Questions:

1: What rpms do you get at 70 mph?
There's no youtube video of someone cruising (or even accelerating) in 6th gear. Maybe some one can post a youtube video of cruising, 1/3 throttle accelerating from 60 and WOT accelerating from 60 in 6th gear?

I'll look next time. Sixth is perfectly usable, more so than in the manual FR-S.

2: How accurate is the speedometer (compared to GPS)?
All the old cars I've had were doing around 67 when 70 was indicated.
The newest car I have (a 2016) is SPOT ON.

Why is this an issue?


3: What kind of cruising MPGs do you get (flat road, no AC, 70mph, stock)?

Approx 30 mpg at fillup, which is all that matters. The MPG display is utterly useless for comparisons.

4: How accurate is the indicated fuel consumption?

Why does this matter? Again, a useless indicator for any real-world use.

5: For "early adopters" (people who bought it in early fall) did you notice a big difference in fuel consumption between summer and winter blends of gas?

No.

6: How do you get the high beams with the new headlights?

The switch on the stalk like usual?

Is there a separate bulb (that I can't see in pictures) or is the whole assembly twisting up?

Is it blinding for the incoming traffic or just a tad brighter than low beams?

It's a high-beam, how would it be different? I get flashed often when on low.

Thank you!

Originally Posted by Borchert97 (Post 2859784)

I always use the electronic speed warning signs around the city to gauge a vehicle's accuracy. As OP said, a lot of vehicles do understate their own speed. I'll go by an electronic sign indicating, for example 25 mph, at 32 mph, but the sign tells me I'm going 29 mph.

Originally Posted by Shinigami301 (Post 2859764)

Certainly did not mean to irritate you with that, sorry if I did.

Originally Posted by Ultramaroon (Post 2859850)

Don't worry. Tcoat's just a d!ck.

Originally Posted by humfrz (Post 2859965)

Ultramaroon ....... shame on you ....... :slap:

@Tcoat is NOT that way ALL the time ...... :wub:

Originally Posted by Ultramaroon (Post 2859971)

Ok, he's not a d!ck. That's just a very tiny part of him.

Originally Posted by PetrolioBenzina (Post 2859804)

Buy the car, but if these are actual concerns for you, you will go mad once you have the thing.

Originally Posted by DM7 (Post 2859788)

Tire wear will affect your speedometer reading as well. Going from a brand new tire with 9/32" tread depth to a bald one with 2/32" multiplied by 2 is 7/16" of change in diameter. Speedometer indicated speed will be higher than actual speed. Going from one tire make and model to another will change diameter as well even if they have the same size specifications.

Want accurate speed? Snapchat speed filter is the only way to go. ;)

Originally Posted by Tcoat (Post 2859650)

The high beams are a separate bulb just like the old ones. It will blind oncoming traffic exactly the same any other high beam on a car.

Originally Posted by Andrew025 (Post 2860619)

High/low beams are all one unit on the 2017.

Originally Posted by Tcoat (Post 2860624)

Probably the least of the concerns with this thread really.

Originally Posted by strat61caster (Post 2859676)

1. about 3k rpm give or take
3. Should expect EPA numbers for freeway
4. It is optimistic by at least 10%
5. No, traffic conditions have a bigger impact.

Originally Posted by DandoX (Post 2859755)

In my '13 FRS at sea level it is about 3200 rpm, maybe 3100 but around there.

Your elevation will impact this.

Originally Posted by billwot (Post 2860597)

Originally Posted by Tcoat (Post 2860624)

Probably the least of the concerns with this thread really.

Originally Posted by Tcoat (Post 2859818)

Again not a great way since they can vary even more than GPS or the speedometer. Those signs are just designed to be in the general ballpark and are not a precision device.

Originally Posted by Borchert97 (Post 2860755)

Nah the ones I've seen are all fairly accurate, they use similar equipment to what cops use, and considering the only number that matters is the one the cops get, I'll gladly use it as my benchmark instead of the speedo or some GPS.

Originally Posted by nextcar (Post 2860638)

And you guys are aware that the final drive ratio varies by country, and in the US at least was changed for manual transmission cars in 2017, right? :bonk:

Originally Posted by nextcar (Post 2860639)

You sure about that? Not the wheel speed sensors used by the ABS system?:thumbsup:

Originally Posted by billwot (Post 2860857)

Even if that's correct, its reading rotation...its recording the RPM of a rotating component. The tire size will not alter the rate of rotation.

No speedometer actually records linear travel, it only estimates it based on reading the rotational speed of a rotating component.

Originally Posted by Gil Scott Heron (Post 2860868)

If a smaller diameter tire has to rotate faster to achieve the same automobile speed, wouldn't that indicate a higher speedometer readout, given that the sensors are from the output shaft to the rear wheels?

Originally Posted by humfrz (Post 2860886)

OK, maybe I missed it ....... but what component is measured for our car to calculate its speed .......??


humfrz

Originally Posted by nextcar (Post 2860933)

Wheel rotation

Originally Posted by curiosul (Post 2859628)

Actually thinking about getting one. I test drove one (see my impressions here) but I didn't have time to notice/check everything.
Questions:

1: What rpms do you get at 70 mph?
There's no youtube video of someone cruising (or even accelerating) in 6th gear. Maybe some one can post a youtube video of cruising, 1/3 throttle accelerating from 60 and WOT accelerating from 60 in 6th gear?
2: How accurate is the speedometer (compared to GPS)?
All the old cars I've had were doing around 67 when 70 was indicated.
The newest car I have (a 2016) is SPOT ON.
3: What kind of cruising MPGs do you get (flat road, no AC, 70mph, stock)?
4: How accurate is the indicated fuel consumption?
5: For "early adopters" (people who bought it in early fall) did you notice a big difference in fuel consumption between summer and winter blends of gas?
6: How do you get the high beams with the new headlights?
Is there a separate bulb (that I can't see in pictures) or is the whole assembly twisting up? Is it blinding for the incoming traffic or just a tad brighter than low beams?

Thank you!