E30 Zone

Hi all ,have just finished a very costly 2.7 stroker build to my 325i baur cab 1989.Cheers Ant for the Chip by the way ,my problem is which gear box and which diff ratio should i use to make the most of all that lovely power ? i found one site that suggests Alpina used the standand gear box with a 3.64 LSD what is a little worrying i just bought a late Sport gear box ,please someone help ,cheers ,James.

It's only the lower gears that are different on the 'sport' box - fourth and fifth are the same.
3.64 sounds about right.

Brianmoooore wrote:It's only the lower gears that are different on the 'sport' box - fourth and fifth are the same.
3.64 sounds about right.

Cheers ,was wondering if the lower gears would be to short as well ? should i still with my standard box ,or swap to the Sport?

The more torque you have, the less you need a close ratio box.

Cheers ,wiil stay as i am then .

I am using a standard 320(Getrang 240)'box with my 2.7,and a 3.64 diff.

So is it worth me fitting the sport box in your oppinion then mate ?

baurboy325 wrote:So is it worth me fitting the sport box in your oppinion then mate ?

Frankly,no!

The 'box I am using has almost the same ratios,but the 325i 'box is bigger,has bigger bearings and holds a little more oil,the 'sport' 'box gains the closer lower three ratios and the bigger bearings and oil capacity.

BMW engineering in the '80's used both belt and braces....

Thanks for your help,its much appreciatred will stick with what i have and put the sport box in my auto touring lol ho hum yet another project