430 SEB - Smart E-DIFF Bypass ECU

Awesome work, I wish we had something to control the suspension individually. My perfect setting would be sport mode, with the clutch engagement of race mode (keep slower shifts to be easier on transmission)

 

QUOTE="Ray Smith, post: 147705490, member: 239328"] was lucky enough to be one of the first customers for Stefvan's latest incredible device. I have installed it and have been driving around with it for about a week and over 500 miles and know this is a winner.


It has now been released by Stef and I am awaiting delivery tomorrow. I already have the hell hole apart E-Diff unplugged and just ready and waiting to plug it in upon arrival.

What are your driving impressions so far with the beta testing unit? Like you, I have almost everything they market and am most impressed by the engineering and R&D in his quality bulletproof products. If this is as good as everything else I have bought, it will be a no brainer. Please let me know of your driving experiences and I'll do the same once installed.

 

But confused... your riff can’t be both open and LSD. Does the 430 diff have friction plates inside such that it acts like an lsd when unpowered?


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I think Ray means by open differential a standard differential without clutching interference causing it to not be a limited slip differential, or removing that functional capacity when active. I believe this device deactivates the clutches in the sport and race settings but allows the E-Diff to be active in the low traction modes, ice and rain modes slippery etc. depending on the Mannetino switch selection. It opens up the clutches in the E-Diff in the upper sport race and CST settings. It can be returned to factory normal with the use of the remote control switch. I get mine today and it will be installed this evening and hopefully can get an idea of just how it works and post some driving impressions on Stef's newest development.

 

better explanation https://www.scuding.com/Shop/en/ecu-solutions/126-smart-ferrari-f430-ediff-bypass-ecu.html

 

Mine arrived today. Rain until the weekend


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Installed today. Easy install. Driving impressions are several, U turns are immediately noticeably smoother and easy,no resistance noted, no chatter from rear, and it turns smoother in city traffic. Differential whine at 80 is not as apparent or loud as previously. In straight line highway driving, not much change is perceptible except maybe lane changes are more spontaneous with no resistance. I think things are generally smoother now with the car and it improves driveability IMHO. Shifting, esp downshifts were more crisp, but upshifts about the same speed wise. All in all, if it saves the F1 pump and allows a little longer component life before that goes out so much the better.

 

Hello, why is this a better setup? Surely the ediff takes into account all of and reacts better than mechanical lsd?

 

Super easy install. I have yet to drive it. Maybe took 5 mins to install, that included finding some zip ties.


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Wow, seems like a great update for the F430!

 

So we agree that "open" means non-locking, which I'm pretty sure is universally understood.

The e-diff does indeed have clutches that can engage upon application of pressure in the hydraulic circuit. Without this, the e-diff is open. I.e., not slip limting... i.e. not like a posi-traction.

It seems from reading the Scud Ing description, which let's just say is pretty punchy in some of its assertions, that they consider that even in its open state, they estimate there to be 5-10% locking effect with the system depressurised. This sounds like proper "finger in the air" engineering to throw out number like these, and seems to contradict what they say above this that the diff operates as open 99% of the time.

It cannot be both open and "5-10% locking".

I will accept that the diff remains in a very-limited-slip state following depressurisation of the e-diff, but as with all wearing components, the precise amount of locking will really depend on the age and condition of the system.

 

It cant be correct as he also says from memory that if you fit 235 front tires at 110kmh or 10rpm difference due to 7mm high wheel dia, the diff starts to lock arouund 6-8% from memory and this is dangerous and also wears the f1 system out
Apparently if the tires are correct at any speed driving forwards it will never lock diff

 

A pal of mine just this evening jacked his 430 up at the back- with the e-diff disconnected (as part of a manual swap), he tried turning one wheel by hand to see what happens on the other side. A true open diff would have the other wheel turn backwards, and a functioning LSD would have the other wheel turn the same direction.The result was the other wheel stayed stationary. This shows that the e-diff is, at heart, an LSD as Stef suggests, but one that acting like it's completely worn out. I can imagine that with a bit of heat and expansion, there might be some locking effect, but it will only ever be very minimal.

 

I should add that its not necessarily a bad thing if the diff is basically fully open. I mean, up until very recently all McLarens used fully open differentials, though it has to be said that their entire suspension philosophy is optimised for this. Ultimately its personal preference- if you like how the car drives with the e-diff off, then this is clearly an excellent way to achieve this.