RS5F30A Gearbox different Ratios

[Enuo]

Hi, does anyone know the gear ratios of the GA14DE N14/15 gearbox's? I'm aware that it is the same architecture at least as the CG13 and 1st facelift CG10 K11 gearboxes, and I have access to these ratios. I also have found the ratios for some CD engine RS5F30A gearboxes (different bellhousings though).
I have been unable to find the ratios for the GA version. I'm ideally looking for a slightly taller ratio than 3.895 to make use of the extra torque. It has been suggested the internals from the CD box can be transplanted to another RS5F30A box, but the ratios seem a tad tall even for a 1.6, and I also doubt the input shaft compatibility.
Any help would be appreciated

 

[frank]

somebody posted on here they are
3.33
1.955
1.286
.902
.733
i think andy, no diff info tho

 

[Enuo]

Ahh, those ratios are only negligeably different, unless the diff ratios are different probably not worth it then :/
Just a shame the RS5F31A has different diff splines, not worth custom shafts for such marginal gains...

 

[Skinner_87]

This the same box that's in the proton Andy?

 

[frank]

Ahh, those ratios are only negligeably different, unless the diff ratios are different probably not worth it then :/
Just a shame the RS5F31A has different diff splines, not worth custom shafts for such marginal gains...

it might only be the diff spline on the c/v pot that is different andy ? the spider/balls/shaft/outboard c/v might be the same

 

[Enuo]

Nah, massively different. Much bigger on the N15 1.6 driveshafts at least...

 

[Enuo]

This the same box that's in the proton Andy?

Proton GB will have different bellhousing I think

 

[h701micra]

somebody posted on here they are
3.33
1.955
1.286
.902
.733
i think andy, no diff info tho

Can't be mine I had diff info too :/

 

[h701micra]

@Enuo
This is a 16DS box
http://www.micra.org.uk/index.php?posts/654016

 

[Jen319]

somebody posted on here they are
3.33
1.955
1.286
.902
.733
i think andy, no diff info tho

Had a little search and found this?...

gear ratios:

Preface

CG10 cg13
final drive: 4.0500 3.8947
1: 3.4118 3.3333
2: 1.9583 1.9545
3: 1.3226 1.2857
4: 1.0278 0.9268
5: 0.8500 0.7556
r: 3.3846 3.4167

I can't find Diff either...although...not really sure what I'm looking for there

 

[frank]

Had a little search and found this?...



I can't find Diff either...although...not really sure what I'm looking for there

heh the diff ratio,s are the 4.05 and 3.9 final drive figures on there jen

 

[Jen319]

heh the diff ratio,s are the 4.05 and 3.9 figures on there jen

Oh....yay me? LOL

 

[frank]

Nah, massively different. Much bigger on the N15 1.6 driveshafts at least...

what i mean is to fit the outer 1.6 inboard c/v pot onto the 1.3 shaft andy ?
you can see how much bigger the k11 one is compared to the k10, i dont recall the GA one being bigger still than the k11 one ?

 

[h701micra]

DEs are the same as K11s
But the DS' s are bigger overall

 

[Enuo]

Eh, so the GA16de cv is same as CG13de cv?

 

[h701micra]

Eh, so the GA16de cv is same as CG13de cv?

Same size as in width... whether they check out splines, length depth of those bits etc is different

 

[Enuo]

Guess I was a bit hasty selling my RS5F31A and shafts then...oh well.
How rare is the RS5F31V? Very I'm guessing.

 

[Enuo]

Also, if it was that simple a swap then would someone have not done it before? The RS5F31A has been shown to take over 300hp... 30A dies at 235 according to Jim GTR's blog iirc

 

[Enuo]

Ok, from what I've now read, it seems the driveshafts would have to be shorter as the diff casing on the 31A box is much wider.

 

[h701micra]

31v is uber rare with its lsd