Can anyone help ,some of you might know i am in middle or at the begining of building impreza powerd Mk1 escort , i am going to be
useing a Sti v3 Type Ra engine and gearbox ,

they run a 4.44.1 diff ratio on 16inch wheels cams on v3 Type Ra
rev to 8400 rpm

i will be useing Atlas Axle with 8x13 wheels

does anyone know what diff ratio i will need with the smaller 13 inch wheels to get same ratio as ith 16inch

thanks