puch96

Hello...
Just curious.... I noticed that my redline in 3rd gear now occurs around 92 mph were before it happened at around 86 mph or so...

Is this something that somebody also experienced?? or am I just going crazy??

I heard on the forum that the rotary gets "faster" as milage increases, but you gear ratio changing..????

Maybe as I get more confortable with the engine, I am going past 9K without realizing...???

Thanks for any feedback on this...

mysql101

maybe you wore away your tires and now they have a smaller diameter

DarkBrew

Racing Beat flash?

puch96

no flash... everything is stock..

valpac

iTrader: (2)

Federal standards allow 5% speedo error. Could be that. Have you changed tires?

ivory8

well if the diameter is smaller...then the distance traveled per rotation is smaller, the car also detects speed on how fast the wheel spins since it doesnt know how big the tires are....so how would a smaller diameter make him go faster?

RX927

iTrader: (1)

wheere you going down hill?

8 Maniac

iTrader: (1)

it detects how fast the wheel of a certain diameter spins... if it gets thinner, then it rotates more to travel the same distance. Similar to how if you have 10 inch rims or 20 inch rims, the number of rotations to travel the same distance varies. I believe that's the logic and that it could possibly apply to this situation. The one thing I dont know with any certainty, is if tire wear would be enough to change it, but I honestly dont know lol

Cody Red

speedo error. i used to see 70 in second.

Razz1

And 90 in a flash!

Stavesacre21

Reguardless of what the reason is, it has nothing to do with your car being "faster" with age. There is a constant there that will only change if your gearing is changed, or there is error in the speedo. Don't be fooled into thinking that your goin all that much faster because of that coincidence.

SilverStreak

When a tire gets smaller with wear this would show up as a higher speed reading, although I don't think that the small difference would greatly affect the reading. I went to a smaller tire on an SUV because the tire I wanted wasn't available in the OEM size. As a result my speedometer was 5 mph faster reading at highway speed (checked against a GPS) due to more revolutions per mile on the smaller circumference.

Razz1

Remember.. I would be more interested in keeping your eyes on the road and not on the Speed and tach.

Your obervasation is not scientific and can change at every glance.

Gotian

when I redline 3rd i hit 94mph

machfive

Unless you did a gear swap or tire swap, I can't see those kind of fluctuations.

NgoRX8

iTrader: (1)

maybe you haven't been pushing your car all the way till now. then again, speedo error is a possibility too.

midlife crisis

Must be observer error. Think about it - the speedometer and tach are essentially tied together in the drive train. The only way to get this variation because of tires is if he were to use a GPS or other independent means of measuring speed. Tire diameter wouldn't make any difference in the two reading's relationships as long as they are reported by the speedo and tach.
Unless the clutch was slipping -----------???

Rems31

I used a GPS and my speedometer differed by 5km/hr than what the GPS said. (GPS was -5km/hr)

Gotian

all I know in my car is 41 is fuel cut in 1st
72 is fuel cut in 2nd
94 is fuel cut in 3rd.

Thats for mine, dont know about the rest of you guys, but that is how min ehas been since it rolled off the lot brand new in 06

Spinning Sushi

iTrader: (21)

My car is only 2mph off, I noticed it when I drive past those radar speed sign detector thingy on the road

I also used my TomTom GPS on my phone and it also stated that I was going -2mph from what my speedometer on my 8 was showing.

dmc27

most likely the answer.

tho I thought I noticed a similar change after the recall flash.