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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Review of the MFactory Sport Axles



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      06-01-2016, 02:58 PM   #1
BostonBeemah
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Review of the MFactory Sport Axles

For the past couple of months, I have been running the MFactory Sport Axles and wanted to share my experiences with them.

From the moment I opened the boxes, I knew these were going to be much more robust that the stockers. I have added a couple pics for comparison to the stock ones on my 135i. (My greasy hands dont take great pictures )

The shafts themselves are a bit thinner compared to stock but they felt to be around the same weight (with my super scientific test of holding one in each hand). Believe me when I tell you though these things are definitely more robust in every way. Out of curiosity, I opened up the boot to check out the joints which I unfortunately don't have a picture of. The ball bearings and machining inside were impeccable right in line with all of MFactory's products.

Install was a breeze with having both stock axles out in about 30 mins and the new ones in within another 45 mins torqued and ready to go. (FYI did this on the ground with a single jack and 1 jack stand to modulate the rear control arm)

Just as a word of advice, these things are machined perfectly to the point where you cant just slide/bang them through the hub. Luckily, I have a friend that works at a BMW dealer and was able to bring their axle tool which catches on the threads on the outside of the hub and pulls the axle through. I also recommend buying new lock nuts as well as they are crimped/dented in on the end to prevent them from backing off from the factory.

Similar to this. https://www.fcpeuro.com/products/bmw...qi0aAn8R8P8HAQ

From the first drive until now, I could not tell a single difference in driveability. If someone had swapped them overnight without me knowing, I would be clueless. Not a single noice, vibration, nothing.

In terms of strength, I have launched my car from a dig numerous times and i have run upwards of 30psi on my single turbo banging through the gears with absolutely no issues. I have not dynoed my car yet but in terms of wheel torque, I have seen similar setups making anywhere from 600-650wtq so I would estimate I am currently in that area.

I have these axles paired with my MFactory LSD which I also love almost as much as my single turbo kit.

For the money, you honestly cannot go wrong with these axles. No worry of sending cores in to have rebuilt with stock CV joints, amazing quality, and the lifetime warranty, don't even think twice about buying these!





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Last edited by BostonBeemah; 06-01-2016 at 04:35 PM.
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      06-01-2016, 04:30 PM   #2
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Thanks for the review, much appreciated

For those wondering why our centre shafts are thinner than stock, it is for one reason: weight savings, which helps tremendously with rotational mass. Even though our shafts are slightly thinner than stock, they are made from Forged SAE9310, so the tensile strength, torsional resistance and elasticity far exceeds the oem shafts.

Not that that matters though, as the centre portion of the shaft is not the weak point on axles; the weak points are the outer ends of the centre shaft (notice how the oem shaft tapers inwards at the ends. In comparison, ours taper outwards at the ends), and of course the splines on the CV joints, with our CV joints also being made from Forged SAE9310, with rolled splines.
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      06-01-2016, 05:30 PM   #3
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What do thes sport axles improve and who should get it done? Also do you have a rough cost?
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      06-01-2016, 11:55 PM   #4
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Strength (hold more power) and efficiency (transfer more power to the ground)
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      06-02-2016, 04:34 PM   #5
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Quote:
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Strength (hold more power) and efficiency (transfer more power to the ground)
Any plans for xi axles?
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      06-06-2016, 01:05 AM   #6
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If you have the large diff and MT, they should be the same axles
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      06-06-2016, 11:43 PM   #7
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I just got my pair today, I ordered them a week ago when they were on sale. Definitely looked and felt beefier and the inner cv shaft mounting to the diff looks like a way better design. No complaints and it took about 30mins in and out. They will be put to the test on wendsday at the strip.
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      06-07-2016, 02:39 AM   #8
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Whats the approx cost of these?
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      06-07-2016, 04:53 AM   #9
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We have 1 set left in stock. $799.95 (+ shipping if outside of US)
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      06-07-2016, 07:11 PM   #10
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Quote:
Originally Posted by MFactory
We have 1 set left in stock. $799.95 (+ shipping if outside of US)
That's a great price and your turn around is much better than what I experienced with DSS.

When do we get more information on the carbon fiber drive shaft?
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      06-08-2016, 01:16 AM   #11
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Should have more details next week
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      06-08-2016, 01:03 PM   #12
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Quote:
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Should have more details next week
Thank you!
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      06-08-2016, 02:40 PM   #13
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Mm carbon fiber driveshaft. Is there even an aluminum available?
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      06-15-2016, 01:56 AM   #14
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Some images of our processing:

Dry Carbon Fibre Spool


Dry Carbon Fibre Weaving


Dry Carbon Fibre Weaving (closer image)


Dry Carbon Propshaft anyone?


Finished Product (This is for GT86)


Dry Carbon Fibre 1pc Strutbar - Anyone interested?
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      06-15-2016, 05:42 PM   #15
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I think that I know the answer but need to ask...

Will there be a CF shaft made available for xDrive? If not, would a one-off unit be considered?

I can be reached via PM if you prefer.

Thanks.
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      06-16-2016, 12:20 AM   #16
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Dry Carbon Fibre 1pc Strutbar - Anyone interested?
Uhhh YEA!! Lol let us know any updates about this if you will make it available, thanks
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      06-16-2016, 01:29 AM   #17
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Quote:
Originally Posted by tetsuo111 View Post
I think that I know the answer but need to ask...

Will there be a CF shaft made available for xDrive? If not, would a one-off unit be considered?

I can be reached via PM if you prefer.

Thanks.
If the ends are the same, then it's just a matter of cutting to the correct length. If they are different, then it would mean making a batch of them, which may or may not be feasible depending on market size.
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      06-16-2016, 09:41 AM   #18
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We have the following oem sample propshafts coming in, so we will be developing these fitments initially:

- N54/N55 135i AT
- N54 135i MT
- N55 135i MT
- N54 335i AT
- N54/N55 335i AT
- N54 335i MT
- N55 335i MT
- N54 535i AT

We currently have the following samples in stock, and are looking for testers:

- S54 E46 M3 MT
- N54T 1M MT
- S65 E92 M3 MT
- S65 E92 M3 DCT
- GT86/FT86/BRZ

MSRP will be $1499.95. This is around $100 more expensive than our competitors, but we are the only company to make them from 100% Dry Carbon Fibre (you can google wet vs dry carbon), and the only company that can balance them to 12000rpm with minimal vibration. During back-to-back comparison tests, all of our competitors carbon propshafts vibrated like crazy once spinning over 5000rpm, as none of them possess the machines that we do to manufacture custom joints to within 0.02mm tolerance. Ours are also stress tested to withstand over 5500nm torque (that's over 4000lbs)

FWIW, of all the carbon propshafts we tested, the PST was the only one to come close to ours in terms of strength, which snapped at 4700nm. Don't even get me started on the DSS! lol.

If anyone knows anyone who would be interested in helping us test the current "M" fitments that we have in stock, please ask them to contact us.

P.S All of the current propshafts have been tested for over a year now; just not in the US market, hence why we are looking for US-based testers to help us with promotion
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      06-16-2016, 11:20 AM   #19
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Quote:
Originally Posted by MFactory View Post
Strength (hold more power) and efficiency (transfer more power to the ground)
Efficiency is due to weight saving and I would like to know the lbs difference.

Quote:
Originally Posted by MFactory View Post
We have the following oem sample propshafts coming in, so we will be developing these fitments initially:

- N54/N55 135i AT
- N54 135i MT
- N55 135i MT
- N54 335i AT
- N54/N55 335i AT
- N54 335i MT
- N55 335i MT
- N54 535i AT
Perhaps you can make one that will allow direct swap to m3 differential as well. Currently, n54/55 need custom propshaft for that mod.
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      06-16-2016, 11:32 AM   #20
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Quote:
Originally Posted by feuer View Post
Efficiency is due to weight saving and I would like to know the lbs difference.
Not just weight saving, but balance

Quote:
Perhaps you can make one that will allow direct swap to m3 differential as well. Currently, n54/55 need custom propshaft for that mod.
Will look into it
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      06-17-2016, 08:13 AM   #21
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For the carbon propshafts, they weight approx. 5kg, which is around 50% lighter than the oem propshaft

After some research into the strut bars, we have decided to do the following:

- The oem M3 strut bar is a 5pc design (Centre Mount, 2 x Strut bars, 2 x Mounting Rings)
- Our strut bar will follow the same M3 design, but will be a 3pc design (OEM Centre Mount, 2 x Dry Carbon Strut bars with integrated mounting ring)

Although this will be lighter, weight savings are marginal due to the relatively low amount of raw material used in the first place. Being 100% Dry Carbon (aside from the Centre Mount, which will still be OEM), it will be several times stronger than the OEM steel strut bars/mounting rings.

And for those wondering about pricing, it will be less than the price of the OEM part (which, at $500, is quite expensive to start with).

So, not only will you be getting a design based on the OEM M3 Strut Bar, it will also be lighter, stronger and lower cost.

Before we proceed with the initial design of this though, I just want to make sure that you guys will actually be interested in this once it's ready?

Thanks!
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      06-17-2016, 11:31 AM   #22
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MFactory is killing it.
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