Drexler Motorsport Diff

[Race82]

Anybody switched their OEM for a Drexler Diff and improved lap times or had issues? Did u swap for a M4 GT4 version or custom set up?

[MPOOR]

I heard its quite expensive but offers an excellent performance~!!!

[Race82]

Drexler Diff now installed and it’s epic, so much more drive out of the corners, anybody thinking about it (for track) shouldn’t think twice, possibly the best mod I’ve made...

[F3IGHTY]

Source, pricing, etc? Is it sold as a self contained unit or just the diff itself.

[Race82]

Originally Posted by F3IGHTY

Source, pricing, etc? Is it sold as a self contained unit or just the diff itself.

Drexler Motorsport will have a distributor near you. It requires the OEM Diff to be removed, opened up and removed, machined and modified and the crown wheel gear updated, the new diff put in plus a new left hand drive shaft as the right hand one doesn’t fit ... plus they recommend fitment of a seperate diff cooling system (esp for racing) and disconnection of the GHAS module which removes the diff control component of the DSC. Sounds scary but if it’s a track beast the increase in traction, drive and lock and will result in significantly reduced lap times. Better to check with your local dealer for pricing as the machine work and fitting is where the bulk of the cost is. You can also choose custom ramp angles (which I would recommend for semi slicks) or the M4 GT4 set-up. Your dealer can assist with this also. Not sure if there are other options out there but if it’s good enough for the M4 GT4, it’s good enough for me 😬 wouldn’t do this on a street car tho...

[M3SQRD]

Originally Posted by F3IGHTY

Source, pricing, etc? Is it sold as a self contained unit or just the diff itself.

Contact driftflo - mailto:mail@limitedslip.de

He’s in Germany but ships custom built diffs for the E9x M3 and F8x M3/4 to the US. I think he also works with someone in the US. He’s extremely knowledgeable when it comes to diffs and building custom race diffs. Here’s a link to his diff thread on m3post: https://www.m3post.com/forums/showth...&highlight=LSD

Toward the end of the thread he shows pics of the custom work required to convert and build a F8x diff.

[ninekrpm]

old thread...anyone done this, feedback?

[SYT_Shadow]

Originally Posted by Race82

Drexler Motorsport will have a distributor near you. It requires the OEM Diff to be removed, opened up and removed, machined and modified and the crown wheel gear updated, the new diff put in plus a new left hand drive shaft as the right hand one doesn’t fit ... plus they recommend fitment of a seperate diff cooling system (esp for racing) and disconnection of the GHAS module which removes the diff control component of the DSC. Sounds scary but if it’s a track beast the increase in traction, drive and lock and will result in significantly reduced lap times. Better to check with your local dealer for pricing as the machine work and fitting is where the bulk of the cost is. You can also choose custom ramp angles (which I would recommend for semi slicks) or the M4 GT4 set-up. Your dealer can assist with this also. Not sure if there are other options out there but if it’s good enough for the M4 GT4, it’s good enough for me 😬 wouldn’t do this on a street car tho...

What about coding the ghas module to turn off?

[ninekrpm]

Originally Posted by SYT_Shadow

What about coding the ghas module to turn off?

who can do that?

[SYT_Shadow]

Originally Posted by ninekrpm

who can do that?

that's what I'm asking! This is the biggest issue for me about changing the diff


Besides, the eLSD that comes stock is pretty damn good

[silverbackf8x]

Originally Posted by SYT_Shadow

that's what I'm asking! This is the biggest issue for me about changing the diff


Besides, the eLSD that comes stock is pretty damn good

Absolutely! Want is real, would love to go this route but I can’t out drive the factory eLSD. One day

[SYT_Shadow]

Originally Posted by silverbackf8x

Absolutely! Want is real, would love to go this route but I can’t out drive the factory eLSD. One day

I've run two cars all season, one is a E90 stroker with a 'racecarrier' and the other is a CS with stock CS eLSD software

They perform a lot more similarly than you'd think, especially when looking at the price of the racecarrier. The biggest difference is while braking, where the racecarrier keeps the rear of the car more stable than the eLSD

The racecarrier upgrade for the E90 is a huge upgrade, but on the CS/GTS1/GTS2 I will not be hurrying to get an aftermarket diff until the stock one blows up

[swagon]

Originally Posted by SYT_Shadow

that's what I'm asking! This is the biggest issue for me about changing the diff


Besides, the eLSD that comes stock is pretty damn good

A lot of the Ring guys in Germany swap out the E9x/F8x diff for a Drexler unit; the Schirmer cars run Drexlers too. Never got to find out why. I wouldn't be surprised if some do it just because everyone else does.

[SYT_Shadow]

Originally Posted by swagon

A lot of the Ring guys in Germany swap out the E9x/F8x diff for a Drexler unit; the Schirmer cars run Drexlers too. Never got to find out why. I wouldn't be surprised if some do it just because everyone else does.

There was a pretty noticeable difference between the racecarrier and the E9X diff, it's just that vs the F8X diff it's a smaller one.

Money no object I'm sure it's better in the F8X gen as well

Another point is likely longevity. A high quality diff is a pretty rugged affair and likely lasts multiple times longer than the stock one

[APR-M4!]

Maybe RKTunes may know what to do with the module from building drift cars.

[ninekrpm]

Originally Posted by SYT_Shadow

What about coding the ghas module to turn off?

EPIC Motorsports (Randy)…will confirm soon.