Different differencial question????

[FATHER]

Hi guys , i know this theme are used several times on this forum but this time is a technical question.

1. How i calculate the max speed and revs of my car with different diff.
Example:

diff. 3.73 plus 19" wheels

diff. 3.45(stock) plus 19" wheels

diff. 3.63 plus 19" wheels

Thanks for help people

[Montius]

Give this calculator a try.

http://www.juric.org/mopar/tools/topspeed.php

[FATHER]

Thanks for help man.. in that calculator.. the trany final ratio in our TI is 1?

[FATHER]

Well i think this make sense???
6700 rpm

diff. 3.73 wheels 19 136mph
diff. *3.45* wheels 19 147mph
diff. 3.63 wheels 19 140mph

diff. 3.73 wheels 15 (stock) 127mph
diff. *3.45 *wheels 15 (stock) 137mph
diff. 3.63 wheels 15 (stock) 130mph

Edit:

I'm using bad the rpm's first i use 6000 and now i use 6,700

[Montius]

It is in a 5 speed, I'm not sure about an auto.

Cris

[FATHER]

mine is manual, i finish the swap and only need swap the diff , but i have several option to choose

[Montius]

I would think a 3.73 would be too much for a forced induction setup, but I have never driven a blowen TI so I cant be much help to you there.

Cris

[FATHER]

i know is too much but if you calculate that with my current wheels is close to the speed of stock diff because i use 235-35-19