F10 Gearbox Help Required

[dublin22]

Hi i have a nova 1.3 autograss car.the engine is done to the max spec and my quiery is about the gearbox.we are only allowed to use f10 gearboxes.basically i need the best gearbox to get me away fast off the line and be strong in 1st and 2nd gear only. these are the only 2 gears we use.if theres anyone out there who knows these cars inside out i would appreciate the advise on this. please could you email me with details to andrew.griffiths@ntlworld.com .maybe there is a few more tips you could give me on getting the most from the car as well.there are limitations such as no lock diffs ect.i have a 1.75 su carb on a 1200 inlet with a dash pot on top and a k&n cone filter comming off it.this is a prp set up . if theres anything anybody thinks i can add please again email me.The car is a front runner but there are some faster cars out there which id like to beat.
thanks Andy

[mowgli]

1st & 2nd are pretty much the same in all the f10 boxes. The diffs range from 3.74 to 4.5 but for really low ones you need to find a mk1 astra 1200 estate.

[stafford]

shame ive just had 1 robbed

[Stuart]

PM garyc he does similar racing.

[garyc]

What gearbox \ diff have you got on at the moment????

[SRI crazy]

3.9 diff and cluster has low gearing in 1st and 2nd but a 4.1 diff and cluster is lower again, you can get them out of a mulit point injected mk3 astra