gearbox advise with ratios please

[therickyt]

hello
im just starting to build a gt hotrod for oval racing, im using a 1.4 engine which is fairly basic due to the rules, you only stay in second gear all the time so which box will be best so i can accellerate fast but wont make the engine out in revs down the straight,

im running a corsa b with the 1.4 engine and sr carb,

thanks in advance

[mk1nova_rich]

F10 or F13 W394 or 418

[John]

this should help.

http://slindborg.hostei.com/gears/index.php

[floydy13]

i know the stock rod boys or burger rods as i also know them buy look out for nova and corsa sri gearboxs as there a f10 close ratio

[therickyt]

thanks for the link but i have not idea what ratios are for what box or what and f13cr is ex ex, im new to all this so i dont have a clue, all im guessing is that the shorter the final drive the quicker it will pik up speed but i need a long second gear to keep the revs low at higher speed, alot of them swop parts in boxes to make there own with the ratios thay wish

[mk1nova_rich]

SRi gearboxes are F13 :thumb: but only difference is the larger bellhousing, internals are the same

[floydy13]

a nova sri gearbag is f10...i have one in the saloon

[mk1nova_rich]

thanks for the link but i have not idea what ratios are for what box or what and f13cr is ex ex, im new to all this so i dont have a clue, all im guessing is that the shorter the final drive the quicker it will pik up speed but i need a long second gear to keep the revs low at higher speed, alot of them swop parts in boxes to make there own with the ratios thay wish

the boxes are stamped W or C (wide or close ratios) followed by 3 numbers which identify the final driver (ie 418 = 4.18) so use a W for the longer gears followed by a close ratio final drive to aid acceleration (try a 418 first then 394)

[therickyt]

one i have read is using a 22,1 gear change and a 4.1 diff, does that sound good, what does it mean?

[mk1nova_rich]

a nova sri gearbag is f10...i have one in the saloon

bizarre lol im sure the SRi had a larger flywheel and clutch (same as GTE/GSi) and as such had an F13 for the larger bellhousing :confused: not to worry!

[mk1nova_rich]

one i have read is using a 22,1 gear change and a 4.1 diff, does that sound good, what does it mean?

keep the diff, but I cant remember the ratios for the gearsets :tard:

[therickyt]

so what car would i find a w394 from? im guessing thats the best option, thanks for all the help im learning alot and fast

[mk1nova_rich]

try the 4.1 for now and see how that is first

[therickyt]

been googleing and an f13 w394 gearbox is found on a vectra a 1.7 diesel, will this fit straight onto my 1.4 engine, is this the best in ur opinion

[therickyt]

i dont have the 4.1 its just on a car im reading about,

[mk1nova_rich]

no forget what i said about a 3.94. Use a 1.3SR gearbox thats a W418

[therickyt]

ok, any ideas were i can get one from

[mk1nova_rich]

put an advert in the wanted section of the forum, adding your location to your info will be helpful

[therickyt]

iv just googled and an f13 w418 gearbox is also found on a 1.6 astra mk3 will that be ok aswell

[mk1nova_rich]

yes that will be ok