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BMW Differential Tutorial, with pics.
#61
(03-05-2010, 11:05 AM)osiris Wrote: I would like a ratio thats going to give me the strongest pull away but I don't want it to affect my top speed tooooooooo much, I know you can't have both, but I would be happier with a stronger pull away and slightly less top speed as I don't drive my car at top speed very often, I don't really want to end up in prison lol.
3.46:1 is a good ratio for a 5spd box.
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#62
(04-05-2010, 11:46 AM)Gizmo Wrote:
(03-05-2010, 11:05 AM)osiris Wrote: I would like a ratio thats going to give me the strongest pull away but I don't want it to affect my top speed tooooooooo much, I know you can't have both, but I would be happier with a stronger pull away and slightly less top speed as I don't drive my car at top speed very often, I don't really want to end up in prison lol.
3.46:1 is a good ratio for a 5spd box.

Gizmo, How different is that from a STD diff ratio? and how much will acceleration improve? and what will the Revs be at 120Km.h in 5th?

cheers
Check out My EX Car : 2000 E46 318i
[Image: Signature.jpg]


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#63
I have a 2002 m3 (ø210 ring) and want to change to a numerically lower gear ratio from my 3.62:1. What ratio's are available for this housing in the 3.07, 3.15 range?

Does anyone know where I can get a nice gear set? New would be fine.

I don't have many miles on the car and just started driving it every day. Most of that driving is high speed.
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#64
(24-04-2010, 01:39 PM)Gizmo Wrote: I got a 3.64 from an X3 for a customer. It went into an E46 330i with a quaife and used as a dedicated track car.

No ring and pinion from type 188 or 210 will fit onto the e46 diff.Censored

Do I understand you correctly that no ring and pinion from any other model (including newer e.g. 3-series E9X, 1-series E8X, Z4 E85/E86, and X3 E83) will fit in the E46 housing?

There appears to be custom gearings available from e.g. http://www.diffsonline.com/product/customdiff2.shtml that have ratios that can not be found on standard e46 - will these then be custom-made?

Thanks for sharing your expertise!!
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#65
what are the lsd options for an e46 323i...dont want to change my ratio
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#66
(08-06-2010, 12:04 PM)moranor Wrote: what are the lsd options for an e46 323i...dont want to change my ratio
I have used a Quaife and they have versions that fit both with the original ratio as well as higher e46 ratios.
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#67
do you have contact details for me?
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#68
(08-06-2010, 12:50 PM)moranor Wrote: do you have contact details for me?

I bought mine from Birds
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#69
now why is google so useless ive been searching every where i also want to look at the type 188 diff from a 5 series which is better and why i know it will be the cheaper option...
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#70
hmm, am I correct in saying that 188 type LSD will fit 330 E46 ? or does the 210 which the M3 uses also fit it... what u using in your 330 Giz ?
[Image: avatar8.png]
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#71
(12-06-2010, 05:06 PM)clutchplate Wrote: hmm, am I correct in saying that 188 type LSD will fit 330 E46 ? or does the 210 which the M3 uses also fit it... what u using in your 330 Giz ?

The 330 has a 188 diff (same as other 6-cyl e46). There are different Quaife units depending on the gearing - if I remember correctly one below 3.38 and one for 3.38 and higher. The M3 diff does not fit standard e46 - you need a different rear axle carrier, output shafts etc.

You can fit some other differentials on the e46 to change gearing - e.g. from the X3 - but it is still unclear to me whether you can change fit the gears from X3/e90 etc in an e46 differential gear housing.
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#72
kewl, not so worried about gearing, I just want LSD, the car must be able to drift and pop Bluebiggrin haha..
but kewl, if it has 188 type, then I can get a 188LSD.. SCHWEET :D
unless I find a M3 rear axle
[Image: avatar8.png]
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#73
Mr gizmo, i applaude you on your thread. I've been searching the internet and no matter what i do i stumble into your thread, and if not on here its been copy/paste onto near enough EVERY bmw site across the world! Clap

I have a question for you though as you seem to be one of very few reliable sources of information on this topic.

I have a 1991 e34 520 with a small case diff. I also have an e34 535 i sport LSD unit. I sourced this under the info that it'd fit my car. Wrong Censored

I then got sent down the raod of a 525i sport lsd. Censored

The chap at the local bmw breakers yard informs me he can build the insides of the 535 large case lsd unit into my small case thus making it work as an lsd.

I understand that the ratios will be all wrong and all that, but all i want is for some learner drifty action from my 520.

Thanks for any help you can give me, and well done again on this thread.

Heres a picture for you guys of the car in question.

[Image: zoomlight.jpg]

[Image: 23.jpg]

[Image: painted3.jpg]


Thanks guys,
Keith.
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#74
(26-06-2010, 04:08 AM)keith-n Wrote: Mr gizmo, i applaude you on your thread. I've been searching the internet and no matter what i do i stumble into your thread, and if not on here its been copy/paste onto near enough EVERY bmw site across the world! Clap

I have a question for you though as you seem to be one of very few reliable sources of information on this topic.

I have a 1991 e34 520 with a small case diff. I also have an e34 535 i sport LSD unit. I sourced this under the info that it'd fit my car. Wrong Censored

I then got sent down the raod of a 525i sport lsd. Censored

The chap at the local bmw breakers yard informs me he can build the insides of the 535 large case lsd unit into my small case thus making it work as an lsd.

I understand that the ratios will be all wrong and all that, but all i want is for some learner drifty action from my 520.

Thanks for any help you can give me, and well done again on this thread.
Keith.
The e34 535i uses a type 188 diff, so does your 520i. So yes its easy to swap the LS centre into your diff.
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#75
Mate i owe you 20 beers if we ever cross paths Thumbsup2
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#76
Will i need to buy any extra parts or will i have everything inside the lsd unit?
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#77
(30-06-2010, 10:47 AM)keith-n Wrote: Will i need to buy any extra parts or will i have everything inside the lsd unit?
everything you need is in the LS portion. You must fill it up with final drive oil for limited slip diffs, very important! You can change the diff seals while you're at it if you want.
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#78
(24-04-2010, 01:39 PM)Gizmo Wrote: I got a 3.64 from an X3 for a customer. It went into an E46 330i with a quaife and used as a dedicated track car.

No ring and pinion from type 188 or 210 will fit onto the e46 diff.Censored

Lifting this question again - still very eager to find the answer :-)

Do I understand you correctly that no ring and pinion from any other model (including newer e.g. 3-series E9X, 1-series E8X, Z4 E85/E86, and X3 E83) will fit in the E46 housing?

There appears to be custom gearings available from e.g. http://www.diffsonline.com/product/customdiff2.shtml that have ratios that can not be found on standard e46 - will these then be custom-made?

Thanks!!
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#79
(30-06-2010, 11:31 AM)oreo Wrote:
(24-04-2010, 01:39 PM)Gizmo Wrote: I got a 3.64 from an X3 for a customer. It went into an E46 330i with a quaife and used as a dedicated track car.

No ring and pinion from type 188 or 210 will fit onto the e46 diff.Censored

Lifting this question again - still very eager to find the answer :-)

Do I understand you correctly that no ring and pinion from any other model (including newer e.g. 3-series E9X, 1-series E8X, Z4 E85/E86, and X3 E83) will fit in the E46 housing?

There appears to be custom gearings available from e.g. http://www.diffsonline.com/product/customdiff2.shtml that have ratios that can not be found on standard e46 - will these then be custom-made?

Thanks!!
I have yet to strip an e90 diff and inspect the internals but from the outside, the diff casings are very similar so it may be possible.
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#80
(01-07-2010, 08:56 AM)Gizmo Wrote:
(30-06-2010, 11:31 AM)oreo Wrote:
(24-04-2010, 01:39 PM)Gizmo Wrote: I got a 3.64 from an X3 for a customer. It went into an E46 330i with a quaife and used as a dedicated track car.

No ring and pinion from type 188 or 210 will fit onto the e46 diff.Censored

Lifting this question again - still very eager to find the answer :-)

Do I understand you correctly that no ring and pinion from any other model (including newer e.g. 3-series E9X, 1-series E8X, Z4 E85/E86, and X3 E83) will fit in the E46 housing?

There appears to be custom gearings available from e.g. http://www.diffsonline.com/product/customdiff2.shtml that have ratios that can not be found on standard e46 - will these then be custom-made?

Thanks!!
I have yet to strip an e90 diff and inspect the internals but from the outside, the diff casings are very similar so it may be possible.
Maybe I will be the first to try then! I know that the Quaife LSD that I have fits both 130i e87 and e46. And given that the 130i e87 diff is the same as that in the e90 325ix, my guess is that they are probably rather similar, if not identical, inside...
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