project: dogbox transmission for st205 Options

[tufy]

Ater i had several transmisson proplems. i realized that i need a stronger one. i decided to build a custom gearbox. so i can decide for ratios. what would you chose if you build one?
here is some ratios

......................Standart...................fensport.............custom
1 st gear......3.38 - 57 Km/h.............3.58....................?
2 nd gear.....1.91 - 100 Km/h...........2.045..................?
3 rd gear.....1.26 - 150 Km/h............1.33...................?
4 th gear.....0.92 - 210 Km/h............0.97...................?
5 th gear.....0.73 - 239 Km/h............0.73...................?

Final drive 4.285............................3.933...................?

can any one tell me what is relationship between final drive and gear ratios.
if gear ratio x final drive ratio is equal, speed is same.

those are thinks that i am planning to have.
*seq. Shifter

*new input and output shafts,
staright cut gears,
dog clutches,
hubs,
forks

*final drive (pinion and crown), front & rear


*front lsd
(not sure about front lsd, fensport is using stock one)

This post has been edited by tufy: Mar 8, 2007 - 6:34 AM

[Bitter]

yes, you want the front and rear final drives to be the same, i was saying that if your new box has a different final drive then you need to include that in the comparison of what your speeds in different gears will be.
http://www.5speedtransmissions.com/gear_calculator.html
http://www.f-body.org/gears/

the final drive also has an influence on wheel torque readings, the higher the FD the shorter your gears and the higher the torque multiplication. however for a boosted car longer gearing can be better since you'll stay in the boost longer and in your powerband longer than if you're shifting more often.



tufy, i know you know what you're doing. i'm just explaining this to the others who may ask or not know.