top speed 4th gear

[WRXracer]

ok what is the top speed with 410s and 430s in forth gear..


how high do you rev..

 

[WRXracer]

ok

there has to be drag racers that know this..

 

[Dark Knight GT]

Ok, Im going to give you some gear calculations based a five speed transmission, the T-45. Theese gear calculations are also based with a 26in. tall tire w/ 4.10 gears.

T-45

4th gear@5800rpms = 109.422
4th gear@5900rpms = 111.308
4th gear@6000rpms = 113.195
4th gear@6100rpms = 115.081
4th gear@6200rpms = 116.968

Here is a link to the site with the gear calculator is you wish to do more calculations.
http://www.tchracing.com/tech/gearc...givenval=5800&givenvaltype=RPM&selectedgear=4

 

[WRXracer]

cool

im getting 430 gears..

 

[NitroDuck]

My 4th is done at about 110-112 running it out the back door to redline.

 

[TrueBlueCajun]

I've done 130+ several times in 4th gear......unfortunately I still have 3.27s.

 

[Huck]

ok what is the top speed with 410s and 430s in forth gear..


how high do you rev..

I calculate 113 mph w/ 4.10's, 26" effective tire diameter, and 6000 rpm. 4.30's would be 113 x 4.1/4.3 = 108mph.

If your tire diameter is bigger, multiply whichever number (108 for 4.30's or 113 for 4.10's) by your tire diameter divided by 26. If you want a different engine speed, multiply by the new engine speed/6000.

It is: speed = (rpms x diameter x 3.1416 x 60) /(rear ratio x 12 x 5280)

or, more simply, speed = (rpms x dia.) / (336 x ratio)

If you want to check it for other gears, just multiply the trans ratio by the rear ratio, and plug that total ratio into the formula.