BallyM5

hi guys i have changed my discs & calipers to the M5 ones

i am thinking about fitting the M5 Lsd to the 535d its the lci version that has 286bhp standard this will be remapped and dpf will be removed so will have alot more power and torque

any one know what the effects be of swapping the diff from 2.65 standard 535 diff ratio to 3,62 M5 Lsd diff?

madein

Well, that is really good question, simply say higher ratio more torque and lower speed.
535d has already higher torque than M5 and with higher ratio diff it would be tarmac eater or ultimate drifting machine.

It would be little bit complicated, than that, so lets say you can drive 70mph on the 6th gear and still have 1800 rpm (just guessing - don't remember exactly) so with higher ratio diff you will need more rpm.

I have found that data somewhere for 535d Auto (I believe is pre LCI)

1st/ 4.17:1
2nd/ 2.34:1
3rd/ 1.52:1
4th/ 1.14:1
5th/ 0.87:1
6th/ 0.69:1

Final Drive: 2.65 to 1

For Example than doing 2000rpm on the 6th gear you would have 2899 on the end of the gearbox going to your differential, now you have 1093 wheel turns.

if you use the M5 diff you get "only" 800 turns.

if we take the wheel as 2m circumference (depends of what are you running 19/20") you do 2186 meters per minute on the original and 1600 meters on the M5 diff.

than you have 131km per hour (81mph)
and M5 diff 96km per hour (which would be 60mph)

That is hell of the cutting of the maximum speed or taking your consumption high.
But as I have mentioned you will rip the tarmac off every time you accelerate.

They have used the high ratio differential as the M5 does almost twice more RPM than our oil burners.

I may be wrong somewhere, so don't just judge on it

But if you change it, let us know what is the outcome and post some video of your drifting

madein

was that strait swap? or you have to change the hub also?

thx

johnbennett103

Pretty short ratio for a high torque motor.

BallyM5

hi buddy thanks for taking your time to write the above sorry for the late reply
i didnt get a email to say i had a reply to my thread

im still thinking about which diff to use i have put the whole front subframe on with hubs

but you can use the discs and calipers alone as i have seen another thread on this site where another member just changed the discs and calipers and the disc dust shields

i dont want the consumption to get messed up rather maintain that

what i might do is fit the m5 diff test how the consumption is and the power and everything and the drifting

and compare it to the 535d diff if i can see it drives better and consumption is still same then i will leave the m5 diff on there

if it goes silly and consumption goes bad i will change it back to the 535d diff

BallyM5

this is what im thinking what will be the final result i know we have more toque than M5 on 535D

BallyM5

as mentioned above jsut posted it here again to help other members

the discs and calipers can be fitted without changing hubs theres another thread on this forum where a member has done the conversion just using discs calipers and dust shields

madein

Ballly, I'm trying to find this, do you have a link somewhere?

thx