edlin

2006 Auto, xB, completely stock drivetrain and intake.

Between Arizona and California, down hill (6% grade), on a 70 mile straightaway, 2am in the morning, with no other cars around for miles...



This was as fast as I could get it to go...

aera

i have been to a 109 and the car screamed the whole way there

TheScionicMan

Been there. O/D won't push it any faster and it screams in 3rd then tries O/D then screams some more...

BTW, stick drivers - check out the RPMs, hahaha

jct

hey now no braggin here

i've had mine (xA, and thats my cars name also lol) up too a 100 and it just hummed along

p2filz

you kno what 9i dont understand, why your car is not in gear "D"

jct

and his clock says 1:27 nit picking here

edlin

LOL so I rounded up to 2 am.. Its all the same after midnight.. I don't get the gear "D" comment. I was in D/OD at the time. From the ratios we talked about in another thread, the maximum sustainable speed by gear in D is 108. In overdrive with about a 2k drop in rpm, I would guess the car is capable of 150.. But the engine can't quite give enough power to reach that. Either way if I know under absolutely ideal conditions the fastest I can do is about 109, then when I add mods, ill be able to gauge if they really did anything...

neckbonenick

Same here. 105

JSosa

I hit 110 MPH yesterday on a nice straight, im sure it could have gone quicker. Mine is a stick shift thought and not stock...

JSosa

I did 110 MPH last night, but of course my car is a stick shift and its not stock. Juts have a good intake header muffler combo.

tat2dude25

Wow, I always wondered that. I'm to much of a wimp to drive that fast. Especially In a car that bounces around the road like the xB. Im suprised it went that fast.

edlin

The xB is supprisingly stable at over 100. I was impressed, I have driven other cars which were scary at those speeds. My z28 I use to do that az-ca trip at over 150 (Not sure the actual number cuz the speedometer didnt go to160). Anyway Im not saying that its safe, Just the car feels fairly solid on the road and I wasnt getting any shimmy or that really light like you are going to come off the ground feeling you get in some cars. Make sure your tires are rated for it.. or at least that you arent doing it in hot weather. Hot tires and going fast for a long time could end up very badly, in a straight line or not.

hotbox05

i've gone 125. fun fun.

edlin

U did 125 in an xB? How?

hotbox05

um flat land. flooring it for maybe 45 seconds.

Gothbox

I cant get to go over 103 with a full exhaust, header and CAI and Iridium plugs.

hotbox05

well you do have a slush box

djct_watt

Yeah. . . I hit about 118 on huge flat area in the dead of night (believe it or not, ambient temperature helps). Even a 5mph head/tailwind will play a role.

xA and 5spd.

I would be curious as to the top speed of an auto xB on a flat road, rather than a downhill grade. It reduces the load on the engine quite a bit. . . ESPECIALLY at 6%. That's a 6 foot drop for every 100ft. A 6% grade is fast at hwy speeds

Calculate everything out, and at 106MPH, you travel approximately 155 feet/second, which means that you're dropping at whopping rate of 9 feet/second!!!!! But then again, that number doesn't really mean anything at all, since it doesn't actually tell you how much gravity is assisting you, but rather your speed of decent. But as with all slopes, you increase your accelerational forces, since you use gravity to help you accelerate.

And all that means squat too, since I don't think you were looking to race anyone. Just be aware that traction on a downhill grade ain't so good, and that braking is especially dangerous, since you will almost completely unload your rear tires at that speed and going downhill.

PoBoyxB

i havnt gotten my xb yet, but ive gotten my bmw to about 135

hotbox05

bmw isnt a scion. i've taken my supra to like 155. but that's not what this thread is about. lol

oh and well uh my bmw goes 120mph. lol