hello,

I am working on a racing project based on a VW Polo 86C gt with GK engine, and I would like to know which of the following gearboxes has the shortest ratios - especially in 1st and 2nd gear (for better acceleration on short circuits / slalom / sprint).

I already have the following gearboxes:

AHD

8P

GU
Or possibly where can I find this data reliably (ETKA, workshop manual, database?

https://www.clubpolo.co.uk/topic/317419-085-gearbox-code-identification/

The last two posts still have live links which list the ratio on most boxes.

Edited 14 June, 20251 yr by Yeti

Add 165/60/r13 front tyres for ~3% shorter gearing.

I used to use Falken Ziex ZE-502 on my GK engined Polo, but they are discontinued.

Maybe try with Nankang AS-1 Ditchfinders, before splashing out on Pirelli P7 Corsa D5 race tyres in that profile.

I'm currently running 175/60R13 NS-2Rs because my racing class only allows semi-slicks, and these were a more affordable option. However, once these tyres are worn out, I plan to switch to 175/50R13s for better acceleration.

Edited 15 June, 20251 yr by yarne_l