A quick speed table for those with 4.44s
 

Just so you know, a bit of research has yeilded the following numbers for 4.44's


When your car says________________________You are actually going.
10mph -------------------------------------------------9 mph
20mph-----------------------------------------------18.2mph
30mph-----------------------------------------------27.3mph
40mph-----------------------------------------------36.4mph
50mph-----------------------------------------------45.5mph
60mph-----------------------------------------------54.6mph
70mph-----------------------------------------------63.7mph
80mph-----------------------------------------------72.8mph
90mph-----------------------------------------------82.9mph
100mph------------------------------------------------91mph
110mph---------------------------------------------100.1mph


This assumes you got your tranny out of an outback.

In other words, you are travelling 91% the speed indicated, or 9% slow


Please update your brain accordingly.

-Patrick

What would be the difference if you have a stock 4EAT with a 4.44?

No idea, depends where your diff came from. If it came from an outback, probably exactly as the table above. The speed sensor essentially reads axle speed, but the speed is calculated based on a taller (outback) tire. Since ours is not so tall, we get a speed discrepancy.



-Patrick

Hmm...well when YT did it, he swapped the SVX speed sensor in, is that table based on an Outback trans with the Outback speed sensor? Or SVX Sensor?

I am also running the SVX speed sensor, but the gears are a different diameter, and so rotates faster in the diff, which throws off speed, regardless of the sensor.

Ooooo...good to know. Now I don't have to worry about going just over the speed limit anywhere:p

I use my GPS to see what speed I'm travelling at, and my speedo generally reads roughly 3 mph faster than the actual speed.

Just so everyone knows, I figured these out on paper, then took a stopwatch and my car out on the freeway to verify, these numbers are solid.

So, if you run larger diameter wheels and tires you could negate the error caused by the 4.44s. It takes a bit of math, but if you persist you should arrive at a combination that makes the speedo spot on. A case where you add a new problem in order to solve both!
Preston

i think i have stock gearing... but my speedo is off by 5mph... lol i always check it with the speed radars and ill be doing 25 in my car and look up at the screen and its like 21 or 20....:lol:

Am I missing something here?:confused:
I thought it was off by 5.5%.
The way I see it is that the speedometer reads only axle rotations.
So if the speedometer is reading axle rotations, and the transmission "expects" a 205/70/15, but actually gets a 225/50/16, a slightly shorter tire the speedometer should read a little high, (5.5%) as the SVX is not travelling as far as it would, if it had the expected (taller) tires on it.



http://aycu11.webshots.com/image/391...7127151_rs.jpg

Ohh, lemme at that web site.


May have something to do with the fact that I am running 215/45/17"


:o

http://www.subaru-svx.net/photos/user.php?LarryIII|14766

Compliments of LarryIII's locker. I use it all the time. Thanks!!!

Yes! Thank you Larry!

Hmm... even with the values I entered, it still doesn't explain for the inaccuracy.


Something else is afoot here, gentlemen.

I my odometer reads precisely 1.09 miles per 1 mile. No matter what, no matter what mile marker. Or one minute, 6 seconds per mile on the stopwatch, when the speedo shows precisely 60 mph no matter what.

Possible causes anyone? Only started happening after the 4.44s were installed.

-Patrick