help needed with gear box ratios

[dan-gte]

hey all
looking for some help with gear box ratios
ive just blew 2nd gear in my box off my rally car and im not sure what the cluster is out of ( cant get hold of the bloke who built it ) i know its not a f10 its a really close ratio thats currently in so if anyone knows the ratios in a f20 and f13 and any other possible cluster it may be .

thanks :)
dan

[Southie]

Stuarts gearbox ratio program should help you, it's also got links to gearboxes at the top to said gearboxes CLICKYME (http://slindborg.host.sk/gears/index.php)

[stampy_54]

1.96 or 2.14/2.18 are usual ratios for f10/f13 depending Esther its close or wide ratio