E92 M3 Rear Subframe + Diff upgrade

[Pig Farmer]

Originally Posted by pavo335

WHICH EBAY, WHERE!!!! TELL ME NOW!

pretty please

I guess it is the USA eBay? Give me a minute and I'll find the link for you.

[Drawn05]

Originally Posted by pavo335

WHICH EBAY, WHERE!!!! TELL ME NOW!

pretty please

Ebay Motor USA. I just had a look and whilst it looks in good condition, its only the Diff and they wont ship to aus.

[Pig Farmer]

Try this....

http://www.ebay.com/itm/2011-bmw-m3-...6f4820&vxp=mtr

[pavo335]

thanks I found it and it smells a bit. why replace the cover if it had a scratch??? anyway I'm after what Steve got a full rear subframe assembly.

Sorry to say steve but if it doesnt fit the 1er.......ohh crap the ratio is no good for me.... Faaarrkk, in that case i'll stop thinking bad thoughts and i hope all bolts up ok

[TimMc]

Looks like a great setup Drawn!
Does anyone know if the M3 diff cover with it's cooling fins will fit on our 135 diffs? I've got the quaife LSD internals but would like the extra cooling.

[pavo335]

Originally Posted by TimMc

Looks like a great setup Drawn!
Does anyone know if the M3 diff cover with it's cooling fins will fit on our 135 diffs? I've got the quaife LSD internals but would like the extra cooling.

i'm pretty sure harold (HPA) sells a custom finned cover.

[TimMc]

Taa. I'll check it out.

[MrBlonde]

Originally Posted by bmroxm5

Niiiiceeeee!

Should be a good mod.. keen to see how the gearing works out.

I know solid aluminium bushings have near zero flex, but on a daily driven car that's likely to invoke a lot of NVH... The Turner site themselves say it's recommeded only for race cars or something to that effect.

I've got all solids on my M Coupe and found it fine on the street but each to their own. You can't really have tough AND OEM comfortable.

[MrBlonde]

Grat example of a thread with good content, adult discussion and mutual assistance! Well done boys! Pats on the back all 'round.

[Drawn05]

I am going to wait until it arrives and Peter can check it out before I make any further purchases. I think the brakes might be an issue as if I was to have the subframe bolted up as is, the stock 135i brakes might not fit.

If so I would have to source some M3 calipers and rotors (front and rear) which would cost about $1000. Not to mention that I want to get a Meth kit and tank in before summer!!!

[TimMc]

Justin Wade from Midas at Tingalpa here in Brisbane recently fitted all the M3 running gear / front & rear subframes / drivetrain to his E90 320i sedan. He may be able to give some advice if Peter can't help. Justin's gone to a race spec brake setup though.

[Drawn05]

Well, I have a bit of time before it arrives to suss things out - the ship its on has an eta in Sydney of 11/11/12.

Looking at the M3 brakes, I just cant see how they are superior to the 135i ones. I would have assumed that the bigger pads and 6 pistons of the 135i calipers would disperse heat over a greater area than the comparatively tiny M3 pads.

Not sure if M3 calipers would require minimum of 19" rims as well.

[pavo335]

i thought the m3 brakes were 2* the size of the 135 brakes?????

[dontask]

Originally Posted by Drawn05

I am going to wait until it arrives and Peter can check it out before I make any further purchases. I think the brakes might be an issue as if I was to have the subframe bolted up as is, the stock 135i brakes might not fit.

If so I would have to source some M3 calipers and rotors (front and rear) which would cost about $1000. Not to mention that I want to get a Meth kit and tank in before summer!!!

IIRC the M3 also has a different master brake cylinder setup. So its not so simple as doing a straight caliper/rotor swap.

[dontask]

From here:

http://www.e90post.com/forums/showthread.php?t=487328

The E9X M3 brake master cylinder has its own part number. That means it's most likely that the E9X M3 probably generates a different amount of pressure, most likely HIGHER because the E9X M3 calipers probably has a much larger piston area.

Just bolting on E9X M3 brake parts on a run of the mill E9X would actually result in REDUCED brake performance because the E9X brake master cylinder will NOT be able to supply the same pressure the E9X M3 master cylinder can.

On the other hand, the E9X 323i, 325i, 328i, 330i, and 335i in addition to the E82 and E88 135i all share the same brake master cylinder part number. The "best" upgrade available, if you want to stay with BMW part numbers, would be to use the 135i calipers with 335i rotors with a custom caliper bracket.

Or just get an aftermarket BBK that is designed specifically for the vehicle and be done with it.

[MrBlonde]

Go aftermarket brakes.

[TimMc]

Originally Posted by Drawn05

Well, I have a bit of time before it arrives to suss things out - the ship its on has an eta in Sydney of 11/11/12.

Looking at the M3 brakes, I just cant see how they are superior to the 135i ones. I would have assumed that the bigger pads and 6 pistons of the 135i calipers would disperse heat over a greater area than the comparatively tiny M3 pads.

Not sure if M3 calipers would require minimum of 19" rims as well.

M3 discs are wider & have a larger diameter.
Don't M3s come standard with 18s with 19s an option? I'm pretty sure most 18s fit.

[pavo335]

Originally Posted by TimMc

M3 discs are wider & have a larger diameter.
Don't M3s come standard with 18s with 19s an option? I'm pretty sure most 18s fit.

yes 18's std and 19's option

[Drawn05]

The ship the subframe is on is just entering the suez canal and is on schedule to arrive in Sydney on the 11th November. Cant wait to get this on my car!!

Got the front M3 bits and pieces from Stu@BMR for a good price.

Peter has assure me that he can replace the wheel carrier of the M3 for the stock 135i one and keep my stock calipers, which is good for the wallet.

Shame we cant also 'bolt-on' the exhaust note of the M3, my restriction free exhaust makes my car sound more like a speeder-bike from Return of the Jedi than a performance car.

[Mechz]

Originally Posted by Drawn05

The ship the subframe is on is just entering the suez canal and is on schedule to arrive in Sydney on the 11th November. Cant wait to get this on my car!!

Got the front M3 bits and pieces from Stu@BMR for a good price.

Peter has assure me that he can replace the wheel carrier of the M3 for the stock 135i one and keep my stock calipers, which is good for the wallet.

Shame we cant also 'bolt-on' the exhaust note of the M3, my restriction free exhaust makes my car sound more like a speeder-bike from Return of the Jedi than a performance car.

Transplant the v8 from an M3 and I'm sure the note will be to your liking.

[pavo335]

Originally Posted by Drawn05

The ship the subframe is on is just entering the suez canal and is on schedule to arrive in Sydney on the 11th November. Cant wait to get this on my car!!

Got the front M3 bits and pieces from Stu@BMR for a good price.

Peter has assure me that he can replace the wheel carrier of the M3 for the stock 135i one and keep my stock calipers, which is good for the wallet.

Shame we cant also 'bolt-on' the exhaust note of the M3, my restriction free exhaust makes my car sound more like a speeder-bike from Return of the Jedi than a performance car.

i bet you cant wait steve!!!! any idea on an eta for the finished product?

[BMW86]

This is a great mod, think I'll go down this route when something pops up online although I already have a Wavetrac which I'm very happy with. It should make a huge difference. I wonder how the m3 diff works with the DSC/DTC though.