5-Speed. 105 this morning on the way to work. Still had some left.

 

Auto...

112 on a flat straight surface

123 from flat straight surface to steep downhill grade

Both of those speeds make me nervous.

-Z

 

Speedo and Tach swap
https://www.scionlife.com/forums/vie...motoman#212510

PM for info... or AIM: MyYz400

 

those wheels/tires are about 25.1" in diameter the stock is 23.7" that is enough of a difference to change your speedo, odometer, mileage, power, in other words the pick up and go got up and went

 

If your speedometer was not recalibrated when you put on the 18" wheel, you may be going faster. Check out this page and put in the stock wheel size.

http://www.net-comber.com/tirecalc.html

 

i have gps in my car and when i get a 3-D lock, the speedometer for the gps is exact with my bulky xB speedometer.......if that helps anybody out......also i haven't been able to get the car over 115mph, no matter how many people i have in the car or what not, i have have 4 ppl in the car and my subs and get it to 115(downhill) but even when its just myself i can't get it over 115 downhill........whats with that..?

 

Top speed is affected by several things. Gearing, horsepower, and aerodynamics. For a certain shape, it will take so many horsepower to cruise at a certain speed. If you increase the gearing you are not going to go much faster if the car was designed to use 100 horsepower (hypothetical) at 100 mph at 5000 rpm. If you up the gear ratio, you will be making less horsepower at 100mph, and therefore might not be able to achieve that speed. I think the manual cars have a lower final gear, which would allow it to run the engine a little higher, make a little more power at the same speed, and therefore go even faster. But there is a point when the aerodynamics of the car prevent the car from going faster, a pure horsepower to wind resistance relationship.

I have had mine up to about 105, but think it could go faster, and after my escort 8500 x50 and escort zr3 install, hopefully i can make it go 105 all the time.

 

Im heavy and in houston put mine up to 100 with no problem vroom vroom all stock so far

 

lol i gotta try mines out now read every post here cant wait till i get my box too bad i live hawaii tho not to many spots to pick up speed damn cops

 

Right... Whatever. What make you say that?
BTW I'm an AT2 (AW) in the navy aboard the USS Carl Vinson...

 

I have a GPS in my box, when my speedometer reads 60mph, the GPS says 56mph.
I have stock tires and wheels.

 

I have done about 101, maybe less due to accuracy, going downhill on a strech of highway. xB was pretty loaded; my girlfriend and college friend, each of us at about 115, and maybe 40 pounds of cargo. Never tried it alone though.

 

It only takes longer to get to the speed with more stuff on the car but I can't get it above 115 on the speedo at 4800rpm. I'm not telling where I do it because I hit the century mark at least twice a day in the surrounding states. :twisted:

 

I had my box up around 105 mph at 5000 ft and could have gone faster, but I only have 125 miles on it so didn't want to push it too much. I believe I was actually going up hill too. Sometimes in the moutains it is hard to tell if it is uphill or downhill. I looked at my topo map and it is uphill (1% grade). I had a geo metro a few years back, had that thing with the needle almost back to 0mph. The speedo on it went up to 90mph. It was only a 3 banger (yes I was going downhill). So different from my VW GTI 1.8T. Had that thing going 135mph, and it would have gone much faster.

 

Had my box at 110 on the FL turnpike the other day. Have a stick with K&N Typhoon and custom 2.5 inch exhaust. That was all there was . Will let you know after headers.

 

i actually had to let off my xb but i got to about 103mph and i was still going :D