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Diff questions

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tmsmotorsportuk
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Diff questions

Post by tmsmotorsportuk » Thu Nov 08, 2018 12:21 pm

Hi All,

I am an E46 M3 Driver, and hear lots of things about people using Z4 diffs to change ratios, does anyone know about this ?

I've heard there is a 4,1 diff available ?

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TomK
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Diff questions

Post by TomK » Thu Nov 08, 2018 12:34 pm

tmsmotorsportuk wrote: Thu Nov 08, 2018 12:21 pm Hi All,

I am an E46 M3 Driver, and hear lots of things about people using Z4 diffs to change ratios, does anyone know about this ?

I've heard there is a 4,1 diff available ?
I had an e46 m3 for 4 years and never heard anything like that?
The diffs in the z4m and m3 are to all intents and purposes identical, certainly the ratios are the same.
4.1 cwp is available from bmw.
MC[IB], CSL airbox, Schrick 288/280 cams, 4.44FD, UUC SSK, SS race cat back, AP CP9660[F]/5144[R] brakes, Apex ARC-8 with AR-1 or PS5, KW ClubSport 2-way, Turner spherical arms, PMC uniball rtab, VB engine mounts, Rogue pulleys & RSMs, Tillett B6, half cage

tmsmotorsportuk
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Diff questions

Post by tmsmotorsportuk » Fri Nov 09, 2018 5:47 pm

ok, must be the 4.1 cwp is available from bmw that people have mentioned...

Thank you for your help :)

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TomK
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Diff questions

Post by TomK » Fri Nov 09, 2018 7:26 pm

No worries. If you want a 4.1 diff built I hear you could do worse than these guys http://www.jcracing.info
I think the only parts e46 guys like to 'nick' from z4s are the steering racks (z4m coupe has the fastest BMW rack available as far as I know) and the offset lollipop bushes for the fcabs which will give you more caster.
MC[IB], CSL airbox, Schrick 288/280 cams, 4.44FD, UUC SSK, SS race cat back, AP CP9660[F]/5144[R] brakes, Apex ARC-8 with AR-1 or PS5, KW ClubSport 2-way, Turner spherical arms, PMC uniball rtab, VB engine mounts, Rogue pulleys & RSMs, Tillett B6, half cage

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