Math question

[LaserSVT]

If I am going 72 mph in fifth gear running 215/55/16 (I know, the 245/45's are on the way) and am at 2000rpm what is my axle gear size? It is a world class T-5. Free liftime supply of absolutely nothing to the first right answer

 

[86roadrace]

Here you go. This'll provide you with the formulas.

http://www.smokemup.com/auto_math/index.php#gear

And don't worry about the free supply. I've got plenty of it.

 

[86roadrace]

The link in my previous post might not be as useful as this one.

http://bbs.hardcore50.com/calc/?mode=speedforrpm

This one's free. Sorry for the confusion

 

[QUICK91LX]

speedo is still gonna be off with a 245/45/16 tire...if you are going to 17's, a 245/45 is what you want, but if sticking with the 16's, you need a 245/50

 

[LaserSVT]

Thanks 86roadrace I guess the previous owner lied because according to the calculator my car still has 3.08's. So I guess I will have to get a yellow spedo gear - 24" tires, 2000rpm in fourth w/3.08 says 46 mph and that is what the car was doing.