[jaffles]

What do you think going on hear. Seems to work. Any opinions on longevity, reliability, or what is being sacrificed.

[TunafishE93]

Looks like they disabled the DSC which stops the EDL. All smoke and mirrors.

[Cloverdale]

Will require professional surface grinding of 2 gears which will be an obstacle in finding a capable shop for many (which they conveniently seemed to have failed to mention in the posters video). Vehicular DIY is quite pleased with the result it seems after some bad luck with a used factory LSD.

[jaffles]

Thanks, good getting an opinion of what it is and isn't. I know of a shop that could do the surface grinding, but would think it would add a few hundred to the job. I watched several of ol mates youtubes and not once did he mention grinding.

Perhaps Alibaba is a better path.

https://www.alibaba.com/trade/search...m=pcHomeHeader

[Cloverdale]

Alibaba's full of fraudulent offerings! I just dealt with a fraudulent carbon fiber hockey stick mfg. on the Alibaba platform. Suspect you'd be getting nothing in return upon payment on those diff listings unless you know better than I.

[TunafishE93]

The question is why is electronic differential not working for you? Are you actually one wheeling it? Working properly its will rival a LSD. I pushed the 335 to 410hp and with factory diff without one wheeling it.

[jaffles]

Originally Posted by Cloverdale

Alibaba's full of fraudulent offerings! I just dealt with a fraudulent carbon fiber hockey stick mfg. on the Alibaba platform. Suspect you'd be getting nothing in return upon payment on those diff listings unless you know better than I.

Sorry to hear that, I have found Alibaba quite good for what I have bought. I don't think I'd get that level of attention and customer service from a sizable manufacturer elsewhere for the small volume I bought. I'd happily buy a diff center from the platform.

Its AliExpress that is next level. Free returns with either money refunded without question, or I keep the item and a new one shows up. The AI/person? help actually solves issues rather then the endless circular self help BS that ebay produces. Had about 85% success rate of product purchased work, which is not to bad considering what I have bought for 2 BMWs and money payed.

Got 2 car play with reverse cameras showing up tomorrow so will see how they go.

[jaffles]

Originally Posted by TunafishE93

The question is why is electronic differential not working for you? Are you actually one wheeling it? Working properly its will rival a LSD. I pushed the 335 to 410hp and with factory diff without one wheeling it.

Yes you cut to the chase there. Originally it was sought for a bit of drifting. I went out doing skids with the lad the other night and concluded a 330d, or a zf6 with BMW programming makes for a lousy car to do skids in. The notion has since died but I was curious what $500 would get in the original post.

I have to agree the BMW electric diff does a good job in getting traction down. That little twitch out of a corner before hooking up is quite nice I think. Still even with traction off the gear box management won't let you hold a gear in sports once you've hit redline. The dirty ol diesel just can't hang on once its up changed. So wrong car to be putting a LSD in to be honest.

[TunafishE93]

Not a differ myself but know a few.. they weld their diffs, could be they are just cheap but its effective. I asked about drivability on the road and they said "its not that bad" lol.

[jaffles]

Originally Posted by TunafishE93

Not a differ myself but know a few.. they weld their diffs, could be they are just cheap but its effective. I asked about drivability on the road and they said "its not that bad" lol.

cherp, cherp, cherp, cherp....drifters. Took the son down to meet one. He opened his garage and there was a table with a whole heap of piston and crank fragments sitting on it. That was from the skyline in the garage that detonated. He showed us pics of another one of his skylines with its rear end stoved in that was in the body shop. Just outside was his V8 ute that got a machinery the night before, that he also lost his license in for the 4th time, was going to be parted out for fines as it was cheaper to do it that way then return it to standard. He was of too court for the 7th time on Monday. None of these cars are shitboxes, this ute was heavily modified, look great and sounded awesome. He described his hobby in circles or money/maintenance. Tyres, bushes, universals, diff centers, replace bent wheels. Fuel, seals, motor rebuilds, gear box rebuilds. Scratches, panel damage, paint and repair. One consistent debt from thrashing, crashing, and clipping stuff in circles that all spin together and out of time.

Said he had a 100k a year job, was 35 and had nothing besides 7 cars which only 1 was working. Rented and was now with no license again. Told him his hobby was worse then a cocaine addiction of which he knew and agreed.

It was good for my 16yo son to see and hear as he was bright eyed and bushy tailed from watch crap on social media. Kind of the start of getting him to see cars differently.

[Cloverdale]

Originally Posted by TunafishE93

The question is why is electronic differential not working for you? Are you actually one wheeling it? Working properly its will rival a LSD. I pushed the 335 to 410hp and with factory diff without one wheeling it.

What year's your 335i? Cause I'm assuming it's the open diff that's getting me in directional trouble on my 2007's.

[TunafishE93]

The DSC brakes the rear wheel thats slipping. Acting as a clutch LSD. The DSC also cuts engine power if braking the rear wheel that is slipping makes the other wheel slip compared with the rotation of the front wheel.
Now if you enable DTC that still brakes the rear wheel that is slipping BUT doesn't cut power if the rear wheels dont match the front wheels rotation.
DSC off is true open differential with no wheel slip braking.
All years have this.

[Cloverdale]

I've been holding the DTC button down long enough to disengage the DSC and the DTC (resulting in display of symbol below) thinking it was necessary in order to maintain full power upon traction loss. If you're correct I'd be better off engaging the DTC by pushing it once, which I'll try going forward.

[whyzee125]

Vehicular DIY gave a few updates over the years and his held up well. With the complexity of the install and being still an inferior LSD to most others, I'd just get the Mfactory--it's quality, decently priced, and has a lifetime warranty without dealing with all of that BS.

[TunafishE93]

Originally Posted by Cloverdale

I've been holding the DTC button down long enough to disengage the DSC and the DTC (resulting in display of symbol below) thinking it was necessary in order to maintain full power upon traction loss. If you're correct I'd be better off engaging the DTC by pushing it once, which I'll try going forward.

Yes, you have no limited slip in the rear with dsc disabled.. just like the OP video. They disabled the dsc as the "before" part.

[jaffles]

Originally Posted by whyzee125

Vehicular DIY gave a few updates over the years and his held up well. With the complexity of the install and being still an inferior LSD to most others, I'd just get the Mfactory--it's quality, decently priced, and has a lifetime warranty without dealing with all of that BS.

This is fair enough but I am dealing with a car that is worth 10 to 15K, to drop a 2K diff into it doesn't make sense to me. It's not a track car so a $700 chinese one maybe. Probably what half the ones on the track have anyway.

[TunafishE93]

Let us know who DCT enabled and DSC still active works for you. I usually do straight line pulls so not much for rear wheel differential.

[tlow98]

Originally Posted by jaffles

This is fair enough but I am dealing with a car that is worth 10 to 15K, to drop a 2K diff into it doesn't make sense to me. It's not a track car so a $700 chinese one maybe. Probably what half the ones on the track have anyway.

Comparing it to the cost of the car is the wrong metric. You can swap out and re-sell the diff when you’re done with it.

Comparing the money to the performance gain makes more sense in this case.

I’m with Whyzee on this one as I’ve been down similar paths. If you feel like an engineering experiment, I get it, but that’s a totally different thing than buying known performance.

[TunafishE93]

Originally Posted by tlow98

Comparing it to the cost of the car is the wrong metric. You can swap out and re-sell the diff when you’re done with it.

Comparing the money to the performance gain makes more sense in this case.

I’m with Whyzee on this one as I’ve been down similar paths. If you feel like an engineering experiment, I get it, but that’s a totally different thing than buying known performance.

Most performance upgrades are a loss in resell value.
I can't think of one that adds value

[tlow98]

Originally Posted by TunafishE93

Most performance upgrades are a loss in resell value.
I can't think of one that adds value

Yeah, my point as the you can remove it to re-coup the money, not sell it with the car.

All modding is pointless from a money perspective, but he’s trying to increase performance, so I think we should focus on that, no?

[TunafishE93]

Originally Posted by tlow98

Yeah, my point as the you can remove it to re-coup the money, not sell it with the car.

All modding is pointless from a money perspective, but he’s trying to increase performance, so I think we should focus on that, no?

💯 Performance was built into BMW. What i am saying is the performance is there, you might need to change the rear brake pads more often.. but dont spend your money on a non issue upgrade.

You do all the work and it acts the same way. Just push that dsc button

[jcortez75]

This thread is a good reality check on “budget LSD” versus total install complexity.

If the goal is occasional fun + street reliability, I’d decide based on total installed cost (parts + machining + labor + alignment + downtime), not just parts sticker price.

Cheap part + expensive rework usually becomes the most expensive option in the end. Ask me how I know 🙃

If you do move forward, definitely report back after a few months — long-term feedback is the most valuable part of these threads.