What are the max speeds in each gear @7000 with the stock tires.

I have gone through and done calculations on what the speeds should be but I am off by a few mph in each gear.

I have an 03 WRX w/5MT

-skooter

 

1st = 38
2nd = 71
3rd = 112 . . . . Thats what the manual says, I have expierienced

1st = 35
2nd = 68
3rd = 98 . . . thats just cause I might not take it to redline. Cheers

WRX Rush

 

Do you have an automatic or a manual trans..?

Because the tops I experience are
1st... about 33
2nd...about 62
3rd... 94
4th... 127ish

 

I did these calculations using a tire size of 225/45VR17, which has a tire diameter of exactly 25 inches. The stock tires have a diameter of 24.9 inches, which equates to .4% smaller. Not much difference. Treadwear differences amount to as much or more.
Thus, the speeds listed in the thread are very very close.
-Mirror
https://www.i-club.com/forums/showth...speed+in+gears

Also, don't count on your factory speedo unless you've had it calibrated. They can be shockingly inaccurate.

 

Mirror I have been running my car with my friends gtech meter testing the quarter mile and every time I can't hit any higher than 95mph in 3rd.

I have tried countless times to run in 3rd without shifting and I have enven tried going even into the red on the tach. My electronic boost controller monitors speed and rpm and I still can't get any higher than 95 after calc's.

I am going to try to do the grounding mod to try and help make some of the gauges and electronics more accurate.

With the speed I am hitting in each gear after I have done calc's it seems that I have a 4.2 rear axle ratio. I am not sure what happens with the 1.1 rear ratio and if that screws with any thing as far a gearing goes. AWD is so confusing why can't it just be like a standard RWD car and have one ratio... I guess this is the price you pay for traction... Traction definatly worth it..

 

Go to a real drag strip. Their timing system is much more accurate than even the g-tech competition pro model. It's a lot safer, too.

You can't turn higher than 95 mph through the (theoretical) traps because you don't have enough power. It isn't gearing-related. MPH trap speed does not vary with small differences in gearing or tire diameter. Those variables can affect E.T. Horsepower and a wide torque curve is what generates the big MPH numbers.

--
0==WW==0
"…axles of evil…" - george w. bush

 

If you're running stock tires, they are just shy of half a percent smaller in diameter than the 225/45/17s. That will mean fractionally lower speed in gears. I think my calc came out to 97.77mph in third on the 225/45/17s, so a .1" reduction in tire diameter (plus a little tire wear) could easily reduce that number to 95mph in your car.
Cheers,
-Mirror