3.23 LSD ?

Post Thu May 16, 2013 10:30 pm

Picked up a diff today, for my m50 track car. Tag is clear, as above - has the S before the ratio.

Looks like e30 fitment, seller assures me it was on his m50d e30. Just wondering what it will have come from, thus far a well qualified comment has been from an e28 525e and used in the 325e ?

Looking for confirmation of the compatability with an M50 engine and box please.

Post Thu May 16, 2013 10:40 pm

Closeest looks to be the 325e, but that's not what's listed.

http://www.e30zone.net/e30zonewiki/inde ... tial#Ratio

Post Thu May 16, 2013 10:44 pm

US 325e ?

Post Thu May 16, 2013 10:46 pm

Looks to be like from across the pond.
Maybe fromt he continent??

Post Fri May 17, 2013 1:40 am

That's very high,needs a ZF direct drive 'box to get the best from it.

Post Fri May 17, 2013 11:00 am

Are you sure it is not a 3.25 with a rusty tag ?

Contrary to the info in the wiki, All Euro M3s had a 3.25 except Cecottos / Evolution 2 and Sport Evolutions which used a 3.15. ONLY US cars with the standard overdrive five speed used a 4.10.

PS NEVER assume that the tag relates to the diff it is bolted to ! Always check and confirm the ratio.

Post Fri May 17, 2013 11:37 am

Thanks Pete, will get it on a bench and check it. Are the M3 diffs worth more than standard e30 ones ?

Post Fri May 17, 2013 12:01 pm

Think M3 tax!

Post Fri May 17, 2013 12:14 pm

Topblag wrote:Thanks Pete, will get it on a bench and check it. Are the M3 diffs worth more than standard e30 ones ?

Yes, there is obviously the M3 'tax' BUT equally relevant is that they are the ideal ratio for M52/S50 conversions.

I sell good used ones easily for £350-£450. £450 buying a stripped and checked one that has had seals replaced as necc and the casing cleaned and painted.

Post Fri May 17, 2013 12:53 pm

pacerpete wrote:
Topblag wrote:Thanks Pete, will get it on a bench and check it. Are the M3 diffs worth more than standard e30 ones ?

Yes, there is obviously the M3 'tax' BUT equally relevant is that they are the ideal ratio for M52/S50 conversions.

I sell good used ones easily for £350-£450. £450 buying a stripped and checked one that has had seals replaced as necc and the casing cleaned and painted.

I got this for my m50 conversion and paid £300 so it sounds reasonable.