Help: Need advice on selecting gears

[sweetdiesel]

Im trying to figure out what gears for my T-case to order.

There is alot of gear choicees from Profab but not sure if i can get the right ones for the 3 speed lenco.


here is what \i have right now first gear is 2.11 to 1, 3rd is 1:1
31.5" tires 3.73 rear end. I want to be able to run 150mph in the 1/4 with out going over 4500 rpm

Sooo what gears do I need to run in the T-case in order to do this?

 

[sweetdiesel]

here is a gear selection chart from SCS same type of t case as the profab

http://www.scsgearbox.com/default2.asp?active_page_id=152

 

[Akdiesel]

Damn Simon...gunning for low 9s are we

 

[sweetdiesel]

Damn Simon...gunning for low 9s are we

Or go broke trying

I think i got it figured out at a 1.35 to 1 ratio. Now that gives me around 67mph in first gear(4200). With the trans brake i shouldnt have issues getting up on the chargers but i hope it doesnt bog down??? HMMM

 

[Akdiesel]

Holy shit!! 67 in 1st...what rear gears?

 

[sweetdiesel]

3:73

You see a Lenco final gear is always 1:1
I allready have the tallest slicks 31.5" and dont need to buy gears if i dont have to but might?

trial and error