M140i Differential Install with M4 Lower Control Arms [Unlock Hidden Grip]
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- Опубликовано: 10 фев 2021
- Do you want more traction and grip from your M140i? Unlock the hidden traction and grip with the Wavetrac LSD and M4 Lower Control Arm Upgrade.
From the factory, the performance of the M140i is severely limited by the open differential. When horsepower and torque is increased with software and bolt-ons this problem is exacerbated and totally kills the driving experience, especially in low-grip conditions. Once there is wheel slip, the open differential sends power to this wheel, the wheel with the least grip. Behind the wheel, this makes the rear-end feel unstable and slows acceleration and more often than not the answer is to come off the throttle or let the traction control system abruptly kick in.
Whereas the Wavetrac LSD smoothly and evenly biases power to the wheel with the most traction. Behind the steering wheel, this feels like an immense improvement in rear-end grip, with much less traction control intervention and much less wheel spin, allowing you to use more of the throttle in all conditions. It does this thanks to its advanced Automatic Torque Biasing helical and pinion design, which goes one step further in the pursuit of performance, driveability and longevity verses conventional ATB designs.
Old-style designs like the Quaife and others have a flaw where they perform like an open differential. They do this when axle load is substantially reduced or lost which happens when there is wheel slip, suspension unloading (heavy cornering, crests etc.) and wheel lift (on track). Whereas the Wavetrac, with its advanced patented design, creates internal load in these situations, allowing power to continue to be biased. Giving you more performance, more of the time!
Finally, the customer opted for the M4 Lower Control Arms to be installed or 'LCA' for short. These arms add additional, non-adjustable negative camber. Negative camber puts more of the tyre contact patch in contact with the tarmac when cornering, delivering an incredible feeling behind the steering wheel of a substantial increase in front-end feeling and a new limit of grip.
Product Links:
🟢 Wavetrac ATB LSD Exchange Axle for M140i with 2.81 Final Drive: www.regalautosport.com/shop/W...
🟢 M4 Lower Control Arm Kit: www.regalautosport.com/shop/R...
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#regalautosport #BMW #Wavetrac #M140i #LSD #M4 #LCA #Camber #Differential 
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Brilliant video, well presented Ash!
Thank you 🥰 Glad you enjoyed!! Must be weird seeing your car in bits on RUclips, haha!
@@RegalAutosport Lol, had to clean my glasses a few times. Great experience all round, I’m sure I’ll visit again!
Cars & Coffee meet as soon as the pandemic is over I think 🤞
@@RegalAutosport Defo up for that 👍🏼
I've seen you use a lot MOTUL oils, ive heard they are good, are they indeed that good? Should i consider them for my engine oil as well? By the way once again amazing video. Thanks.
We sure do! As an upgrade oil for higher output/track use, this is generally what we use. It’s actually fairly cost effective too!
It's a shame you weren't offering the replacement pumpkin service when I called last month. The only option was to leave you the car for 4 days.
I went to Birds and got a quaife fitted which is absolutely superb (as I'm sure the wavetrac is too)
We offer this all year around... just sometimes a the appetite of the BMW community is so much it outstrips supply. We now have all the BMW applications back in-stock!
Ready for ya when you wanna feel the difference between the Wavetrac and the Quaife, enjoy!
Hey Regal. I've been looking at the F32 440i as of recent and I noticed that despite that it shares the same B58 engine as the M140i, it comes out of the factory with slightly less hp. Do you know the reasoning why that may be? Slightly de-tuned perhaps? Will that result in a stage 1 or stage 2 440i making less power than an equally modified M140i? Cheers.
Max output is generally the same when tuned! Go with whichever car you enjoy most!
stupid question: I know on the later model m140i's they've opened the front left lower vent for OPF cooling, is there any benefit on opening it up on the non-OPF versions?
Thanks for the comment, it's not something we have taken note of. Next time one comes in, we'll take a look and see what it feeds.
i think its an additional oil cooler, not an OPF-cooler...
The M performance is a clutch plated diff, not like the Quaife. I’m not sure the Wavetrack is ‘better’ than the M performance, rather similar in the performance. The Quaife acts like an open diff under normal driving conditions.
Would you recommend doing tension struts as well as LCA’s?
Have you driven both too?
We have plenty of dealers that swap out the M Performance for a Wavetrac, recently Tom Wrigley did the same after struggling to send their M240i sideways with the M Performance diff.
You need to install both the 'tension arms' as well as the LCAs. The kit link is in the description
@@RegalAutosport I have had a Quaife myself on my E46 330 and had no problem drifting that, and a few friends of mine have M performance diff’s on their M140i’s, who also had no issue drifting. At the end of the day, It comes down to the driver. All three diff’s are going to give you the ability to have a more controlled power delivery and to be able to control the back end on the throttle.
Cool, I was worried about the major change in geometry from installing LCA’s, especially how far the push the wheels forward. I’ve been told tensionstruts cancel that out when fitting LCA’s.
Nice! It’ll be interesting to hear what you think once you’ve tried a Wavetrac too.
Yeah, we supply the full kit so you don’t have to have any worries 🥰
@@RegalAutosport I will be installing the M performance diff on my 140 very soon. I am buzzing to go from an open diff to LSD. I remember how big a difference it made on my 330, and I’m expecting the same.
That’s good to know! I’m in Bogor Regis, so not too far from you guys! Might in touch in a few months about that. Thanks guys! 😎
How to use Strut Stainless Steel Cylindrical Spacers Shims Standoffs?
Eh?
What’s the point of premieres? Genuine question.
We like to give our subscribers something to look forward to 🥰
@@RegalAutosport ok, I daily one of these so will be checking it out 👍🏽
Awesome!! Hope you enjoy the video, this customer is super pleased by the upgrade 🙏
What alignment setting shall we choose in the computer? M4 or M140i?
The front camber is fixed, we usually do a 'fast road setup' based on our own settings.
@@RegalAutosport Thanks. What are the LCA parts number to order?
Change the lower arms without PU bushes. It’s like the half power of the lower arms 🙄
Still a stock M4 atm, some people don’t want the extra cost and NVH of an aftermarket bush.
@@RegalAutosport yes that’s true. It’s of course a cost factor in this case. But it’s like sex with a anti baby pil + a condom. It doesn’t match together. A bit crazy comparison, yes...