e28 diff

Post Mon Oct 02, 2006 7:49 pm

got the chance for a 525e e28 diff for my m30 conversion, anyone got any ideas what ratio they are or a link to somewhere that can help

cheers
john

Post Tue Oct 03, 2006 9:31 am

Well it depends on what year it came from. But EPC shows the ratio could be either 2.93 3.07 3.46

James

Post Tue Oct 03, 2006 6:05 pm

Its on an E plate, if thats any help, Where did you find the ratios??

john

Post Tue Oct 03, 2006 10:46 pm

pretty sure it'll be 2.93.

Post Mon Oct 23, 2006 1:10 pm

Got the diff today, it was a 3.07, that'll do me. thanks for the help gents

john

Post Mon Oct 23, 2006 1:55 pm

mine is a 3.08, says so on the tag anyway?

a bit long for a stock m30 but it will still go well and cruise really nicely. a few engine mods will soon make it go better

Post Mon Oct 23, 2006 8:50 pm

for ref
I ve had 3 525e now
one 87 =3.07
one 88 =3.07
one late 88 =2.93, i think its only the very late 88 /89 525e got the 2.93 , dif, and they all had an easy lift too, as they don t rev past 4.5 revs

Post Mon Oct 23, 2006 10:08 pm

Toby_Unna wrote:mine is a 3.08, says so on the tag anyway?

a bit long for a stock m30 but it will still go well and cruise really nicely. a few engine mods will soon make it go better

Its got an E28 dogleg box Toby so it still may be a bit short.

john

Post Tue Oct 24, 2006 7:16 am

Hi is a E28 diff straight fit onto a E30? Also what other models can you pinch diffs from that go straight on? With those ratios mentioned above?

Post Tue Oct 24, 2006 8:51 am

E28 MEDIUM case diff will fit straight on an E30 with a change of output shafts and rear cover for the corresponding items from a medium case E30 diff.

Post Tue Oct 24, 2006 10:39 am

johnl320 wrote:
Toby_Unna wrote:mine is a 3.08, says so on the tag anyway?

a bit long for a stock m30 but it will still go well and cruise really nicely. a few engine mods will soon make it go better
Its got an E28 dogleg box Toby so it still may be a bit short.

john

aha that'll be ok then. pretty much identical gearing to what my m535i had, about 135-140 flat out at 6k with 205/50/15s, more if you put bigger wheels on.

perhaps a touch short as you say but you'll certainly go well off the lights

Post Tue Oct 24, 2006 7:51 pm

Toby_Unna wrote:
johnl320 wrote:
Toby_Unna wrote:mine is a 3.08, says so on the tag anyway?

a bit long for a stock m30 but it will still go well and cruise really nicely. a few engine mods will soon make it go better
Its got an E28 dogleg box Toby so it still may be a bit short.

john
aha that'll be ok then. pretty much identical gearing to what my m535i had, about 135-140 flat out at 6k with 205/50/15s, more if you put bigger wheels on.

perhaps a touch short as you say but you'll certainly go well off the lights

I'm gonna see what its like then maybe experiment with slightly higher profile tyres,I know its not ideal but when you're on a budget of about 20 quid a month its all about compromise. I still need a rad and prop as well. Cheers for the help fellas.
Heres a couple of photos of the chrome turd 316 carb beast ready for conversion. Don't worry all the running gear ARBs etc have already been uprated.

john

Post Tue Oct 24, 2006 10:55 pm

johnl320 wrote:Don't worry all the running gear ARBs etc have already been uprated.

john

i don't worry too much about things like that :lol:

nice wheels, nice colour