Gearbox
Turbo Mini Forums

Evening all,

I just want to find out, I had a look on the forum but cannot seem to find what I am looking for?

Basically I am building my turbo engine and wanted to find out can I use a standard 1275 Mini/Metro gearbox or should it be a Turbo metro one that I need? I want to run straight cuts in there with a X-Pin Diff, but this is when funds come available.

So can you please tell me, will I be ok to run a standard box for the time being? If so, as stated before, the standard box or the turbo box?

Thanks for all the help

Bobby

Yes mate they are all the same.

some good reading on this page=
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=4724

Edited by madmk1 on 24th Dec, 2012.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

oh ok cheers for that info, I have a guy selling a box and diff, he has 2 options a 2.7 and 3.1 diff, which one would be a better option?

Whilst mechanically the fit will be fine, I very quickly broke a standard box with my turboed 1293. I'd recommend being conservative on power and hard usage until you get those straight cuts in. Also, I'd go for a 3.1 diff, certainly over the 2.7. All depends what you want though, top speed or acceleration. I'm doing a rebuild at the moment and intend to plump for a 3.1 over a 3.4 as a compromise so I have a slightly lower RPM for cruising and hopefully don't run out of top speed when I do some of the larger track day events.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=440970

What will give better acceleration?

What size wheels and profile tires are you using?

7 x 10's with 165 x 70 x 10's

Whats the planned usage?

For an everyday road car I would go for 3.1:1

For a weekend/track car a 3.44:1.

Also whats the planned power output? Standard helical boxes can be killed very quickly!

Why not look up exactly what will do waht for you:

http://www.guess-works.com/Tech/ratio.htm

That was a big help, I may go for the 2.7, as this better on 10's for top end speed and quite good on acceleration

It will take a lot of revs to get you moving

Well I managed to get both 2.7 and 3.1 now in the deal i just got, so may just go with the 3.1, which will probably be a better option, as I am not always going to be doing top end speed.