I am putting a Swedish made Tractive sequential gearbox in my FD and need to order the right ratios and drop gears for it. What freely available diff ratios are available for these, and are all the crown wheel and pinions as strong? I would probably run a Giken LSD on this. As an aside, what\'s the widest rear rim and tyre package that will go under the stock arches and allow full unimpeded suspension travel without tyre fouling? I have a customers Feed bodied FD here on 10 inch rear rims, but the steel arches looks considerably altered beneath the glass fibre extensions. Can you get a ten inch rear rim and suitable tyre under stock steel wheel arches? Thanks.
10" will fit under a standard arch yes
FD standard diff ratios are:
auto: 3.9
manual: 4.1
RZ/RSR/RS: 4.3
think you can fit rx8 CWP into an FD casing which can come in 4.7 i think