Four to five stud conversion

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jmc330i
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Fri Mar 30, 2007 6:41 pm

Brianmoooore wrote:
Brianmoooore wrote:The E30, E36s with rear discs, E30 M3 and Z3 2.8 all use the same rear wheel bearings. So what's the problem with fitting one of these five stud hubs onto an ordinary E30 trailing arm?
In theory nothing, the only thing I wouldnt be sure about is the ABS - are there differences between the E36 and E30 ABS?

Custom hubs would most likely work out very expensive and pointless - E30 M3, E36 Compact stuff etc etc are all available anyway.
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buster
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Fri Mar 30, 2007 7:08 pm

Royalratch wrote:It's not the advice, just the throw away manner.

We've been discussing different options and actually trying to see if there is a different way for a while. Many have 'suggested' just chucking on all M3 stuff - so thanks for repeating.

I bet you it's cheaper to get hubs machined.
Listen,i work in a machine shop and know that making these would be costly,very costly.
I have researched this imensley and come to the conclusion that the e30 m3 stuff is the easiest way to do this.
Re drilling is out of the question as the hub isnt big enough to support a 120 pcd of holes.It could be re drilled for 5X 100 (audi/vw fitment) but not 5X120.
If you dont want the abs then e36 front struts are cheaper,and with m3 eccentric bushes fitted to the control arms they work.
For the rear,the only thing you need is the 5 stud hub as the trailing arms and bearing are the same on the back,as is the drive shafts.
So there you go,my comment about fitting m3 stuff is VALID !
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Royalratch
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Fri Mar 30, 2007 7:52 pm

I apologize for offending you buster. But your new comment kind of confuses me a bit more.

Why are people talking about M3/Z3 trailing arms if E36 hubs bolt straight on to E30 rear axles?
jmc330i
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Fri Mar 30, 2007 8:19 pm

Royalratch wrote: Why are people talking about M3/Z3 trailing arms if E36 hubs bolt straight on to E30 rear axles?
If you are just fitting the M3 or E36 rear hubs (if the E36 hubs fit), then you will need to buy calipers to suit the larger available 5 stud discs - buying a complete trailing arm with calipers/discs etc would be the easier, but more expensive route.

Or, as I said earlier in thread, you could redrill the 4 stud E30 disc to 5 stud and keep the brakes as they are, making the rear conversion pretty cheap.
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Fri Mar 30, 2007 9:18 pm

jonb wrote:Chirst kos

Your arms must be aching from all that overtime at heathrow. winkeye :)
nope, sick pay at heathrow is good, got other jobs that pay cash in hand !! LoL winkeye
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Fri Mar 30, 2007 10:05 pm

Kos, If i just go with the e36/m3 hub, can I just bolt on the e32 rear brakes onto the stock 325 rear brakes bracket? Or do i need the M3 bracket?

just trying to get away with changing the least on the rear.
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Fri Mar 30, 2007 10:33 pm

jmc330i wrote:
Royalratch wrote: Why are people talking about M3/Z3 trailing arms if E36 hubs bolt straight on to E30 rear axles?
If you are just fitting the M3 or E36 rear hubs (if the E36 hubs fit), then you will need to buy calipers to suit the larger available 5 stud discs - buying a complete trailing arm with calipers/discs etc would be the easier, but more expensive route.

Or, as I said earlier in thread, you could redrill the 4 stud E30 disc to 5 stud and keep the brakes as they are, making the rear conversion pretty cheap.
How is changing over an entire trailing arm set-up easier than just bolting new hubs onto your existing set-up? 8O
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Fri Mar 30, 2007 11:41 pm

Royalratch wrote:
jmc330i wrote:
Royalratch wrote: Why are people talking about M3/Z3 trailing arms if E36 hubs bolt straight on to E30 rear axles?
If you are just fitting the M3 or E36 rear hubs (if the E36 hubs fit), then you will need to buy calipers to suit the larger available 5 stud discs - buying a complete trailing arm with calipers/discs etc would be the easier, but more expensive route.

Or, as I said earlier in thread, you could redrill the 4 stud E30 disc to 5 stud and keep the brakes as they are, making the rear conversion pretty cheap.
How is changing over an entire trailing arm set-up easier than just bolting new hubs onto your existing set-up? 8O
Try and remove a hub from an arm.. i think you'll understand. Cant remember whats involved doing a hub swap, but if it's anything like a bearing swap, its a real ball ache.

A rear trailing arm: just undo 2 bolts, brake lines and handbrakes and thats it. swap it over. less hassle in my opinion.

Prolly what I'm going to go for, unless i can find m3 hubs cheap!
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Sat Mar 31, 2007 5:52 pm

Kos wrote:
jonb wrote:Chirst kos

Your arms must be aching from all that overtime at heathrow. winkeye :)
nope, sick pay at heathrow is good, got other jobs that pay cash in hand !! LoL winkeye
:eek: :eek: :hump: :(
jmc330i
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Sun Apr 01, 2007 5:29 pm

oze30 wrote:
Royalratch wrote:
jmc330i wrote: If you are just fitting the M3 or E36 rear hubs (if the E36 hubs fit), then you will need to buy calipers to suit the larger available 5 stud discs - buying a complete trailing arm with calipers/discs etc would be the easier, but more expensive route.

Or, as I said earlier in thread, you could redrill the 4 stud E30 disc to 5 stud and keep the brakes as they are, making the rear conversion pretty cheap.
How is changing over an entire trailing arm set-up easier than just bolting new hubs onto your existing set-up? 8O
Try and remove a hub from an arm.. i think you'll understand. Cant remember whats involved doing a hub swap, but if it's anything like a bearing swap, its a real ball ache.

A rear trailing arm: just undo 2 bolts, brake lines and handbrakes and thats it. swap it over. less hassle in my opinion.
I meant more of a convenience factor in getting complete trailing arms with larger discs and calipers to suit, rather than fitting new hubs/bearings and redrilling the 4 stud discs to retain the stock set up, or sourcing new calipers etc.

Depends how you want to do it - one way will be easier but more expensive, they other would be cheaper but a bit more hassle.
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Mon Apr 02, 2007 1:00 pm

i too am currently trying to do this conversion after speaking to any1 and every1 who knows there stuff m3 parts is the only way to go. but problem im having is compiling a full and complete list of all the parts requiered. does any1 know where i can get this list or would mind sending me a copy or anything they mite think would help.
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Royalratch
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Mon Apr 02, 2007 1:29 pm

Would be useful.

As stated above:

REAR: M3 Rear arms with hubs, bearing assembly, discs and calipers still attached. Get lucky at a scrapyard or drop a couple of mill at a dealer.
FRONT: M3 Struts, with hubs, bearing assembly, discs and calipers still attached. Get lucky at a scrapyard or drop a couple of mill at a dealer.
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Mon Apr 02, 2007 5:03 pm

M3 setups aren't that hard to find.

If your really want one then hit the phone and get calling some of the usual suspects, Moseley's is the place to start.

A good setup will cost around £400 - £500 currently.

That would consist of both front struts, rear beam, trailing arms and if you're lucky; the brakes.

You do not need the rear beam, just the trailing arms. The trailing arms are the same as standard E30 as are the wheel bearings. The only difference is the hubs. If you get the rear beam from the M3 then I would suggest not using it as the exhaust brackets are different. Otherwise the rear beams are identical.
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Mon Apr 02, 2007 5:14 pm

Got a list of scrappies you recommend in anywhere south of Birmingham?
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Mon Apr 02, 2007 6:21 pm

Royalratch wrote:Got a list of scrappies you recommend in anywhere south of Birmingham?
In my experience the average scrappy doesn't really get this kind of stuff. You need to try people like Moseley Motorsport. Maybe even Fritz's. If they both draw a blank then ask them who else you can try. Joh at FAB may also be worth a shot. He won't have them but he would know who would.

The M3 world is quite a small one and pretty much anyone who is anyone with M3's knows each other.

Moseley's Tel: +44 (0) 1952 503992
FAB Tel: +44 (0) 1594 827333 option 3
Fritz Tel: +44 (0) 1823 674459

Good luck!
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Mon Apr 02, 2007 6:25 pm

Thanks buddy.

You can delete that post now I've noted the numbers. winkeye
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Wed Apr 04, 2007 10:15 pm

Just priced up some E30 M3 rear hubs (flange), 61.28 each incl VAT. So not as bad as I expected. Just need to price up rear pads/discs.
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Thu Apr 26, 2007 8:47 pm

Right,
Here's a question. If i use the m3 flange and bearing, what will i need brakes wise? Can I fit e32 750 rear brakes? or will I need a special carrier? Trying to keep things oe as the engineers back in Oz are strict when it comes to this stuff.
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Thu Apr 26, 2007 11:19 pm

The rear caliper for the E32's up to 3.5 ltr are the same as the E30 M3 but the carriers are different. No idea if 750 stuff could be made to fit though.
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Fri Apr 27, 2007 5:46 pm

Thought so.. But I cant get the carriers from bm.. Well.. I can but they want someting like 115 per side
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Sat Apr 28, 2007 12:27 am

Col,

It's never worth paying that just for the carriers.I've got some E30 M3 rear calipers if you get stuck.
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Sat Apr 28, 2007 1:46 am

With carriers?? What you going to use?
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MJG
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Tue May 29, 2007 6:01 pm

So did anyone figure out if e36 rear stuff fitted?

e36 drum braked rear hub, fitted onto e30 drum braked rear trailing arm, re-drill the e30 drum to fit and bobs your uncle's mother?

And at the front?

I don't give a rat's ass about brakes, just want 5 stud for cheap. Forget buying new stuff too. £60 would buy me another pair of 17x10s.
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Tue May 29, 2007 6:44 pm

buster wrote:i want 5 stud also.I wouldn't care but i could of had the struts off the car i got the engine from but i didnt know they would fit until glenn fitted them to his 350. :(

I know what you mean about the bmw m3 ones but try and find some.
I work in a machine shop so re drilling them wouldn't be a problem as i could do it properly on a machine.It would have 4 and 5 stud pattern therefore if i drilled the disks the same i could fit both wheels !!! :bmw:

the front e36 complete strut is a good idea as it solves the need for brake upgrade also.
Hey buster,

Are you offering up this service - if so at what price?

Cheers

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Tue May 29, 2007 7:07 pm

Someone earlier said that the hubs are not a big enough diameter to safely drill them to 5x120. The outer edge of the holes would be 10mm further out remember. I havn't personally checked though.
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Tue May 29, 2007 7:12 pm

yeah the hubs are too small
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Tue May 29, 2007 7:22 pm

Bugger!

Anyone doing adapters? :?
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Anyone doing adapters?
dont H+r do adaptors, sure a coule of zoners are using them :?

woo hoo, im regular baby :woohoo:
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Thu May 31, 2007 2:00 pm

Just to recap before I reach into my pocket:

You can get an E30 M3 rear hub and bearing, and fit them to standard E30 trailing arms?

I've just called the dealers and the hubs are only £72 each so I'm thinking I might do it just to save hassle on sourcing second hand parts.

Cheers!

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jmc330i
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Thu May 31, 2007 2:27 pm

Turbo-Brown wrote: You can get an E30 M3 rear hub and bearing, and fit them to standard E30 trailing arms?

I've just called the dealers and the hubs are only £72 each so I'm thinking I might do it just to save hassle on sourcing second hand parts.
Thats the theory and my plan. The bearings are all the same as are the arms except for different brackets (brake pipe/handbrake cable) on the M3 arms.

Whats your plan for the rear brakes?
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Thu May 31, 2007 3:40 pm

jmc330i wrote:
Turbo-Brown wrote: You can get an E30 M3 rear hub and bearing, and fit them to standard E30 trailing arms?

I've just called the dealers and the hubs are only £72 each so I'm thinking I might do it just to save hassle on sourcing second hand parts.
Thats the theory and my plan. The bearings are all the same as are the arms except for different brackets (brake pipe/handbrake cable) on the M3 arms.

Whats your plan for the rear brakes?
There's 2 options that I can see. Using M3 calipers and carriers OR Get some rear discs redrilled to 5x120 and use the stock calipers.
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Thu May 31, 2007 5:09 pm

I was thinking of using the M3 discs and 325i calipers spaced out if needs be. Not sure if that'd work or what the score with the handbrake would be.
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jmc330i
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Thu May 31, 2007 5:37 pm

Looking at the ETK, the M3/325i handbrake stuff is all the same, the M3 just has the larger disc and caliper/carrier.

Unless I find a good deal on an M3 rear setup, I will be doing as oz said and redrilling my 4stud discs so I can use the standard 325i brakes (for the time being) 8)
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Thu May 31, 2007 8:16 pm

Looks to me like the rear driveflange/hubs on the e36 compact, ti, and z3 should all fit. They have the same common denominator in all the realoem entries.

I'm going to try and just fit the 5 stud flange from an e36 from the scrappies and see how I go. Not had a close look at all the rear end jazz so trial and error is the way forwards.

5 stud on the back is good as I just bought some 17x10s in 5 stud for £85 delivered and then I can worry about the front at a later date. Seems that e36 struts and hubs etc is the way to go, then will try and make some custom wishbones up front to get them sitting right with camber/caster etc. If all goes to plan (50% chance) then I'll be happy to make more arms up for cheap cheap if people want simple 5 stud swaps with a couple of degrees neg camber and a touch more caster than standard e30.
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