F430 E-DIFF / Electronic Differential Info

Hi Dan,
Thanks for the post. I recently install the Scud eMT relay. for most part have gotten 5 beeps which means it's taking 2.5 sec to pressurize the pump (0.5 sec/beep) which is normal. I have once in a while got 7 beeps which to me means it's taking 1sec longer? Is that right? I'm assuming your not getting any red light, so why would you think it's the accumulator or the e-diff?
Please let us know after the fix if the 7 beeps goes away. Thanks

 

Dan, do you have beeps enabled? I turned mine off...would I still get the beeping in that mode if something were wrong?

Every once in a while I get a beep/s during spirited driving...will pay attention to how many.

 

I also get the 7 beeps in the exact same way as @whatheheck. My car is going in on Thursday for changing the accumulator and troubleshooting of the system. The Ferrari specialist says he has his own diagnostic procedure that takes between 2-3 hours to go through, it includes driving the car in a specific pattern.

I´m thinking it might be enough with only changing the accumulator and troubleshooting the system with SD3?

 

can somebody tell me how many bleeding valves are there to bleed e-diff for 430? and the sequence please?

 

It is possible to graph the pressure drop and recharge cycle of the system to get an idea how well it is holding pressure.

 

It was asked a long time ago in What is an E-diff?, what is actually the functional difference between "standard" slip diffs and the E-Diff. Is there anybody knowledgeable enough to share some insights? It would be interesting to learn.

Cheers,
TS

P.S.: I also have the Scud Ing Smart eMT F1 Relay ECU (Basic) laying on my desk, waiting for install. Will do this in the next couple of weeks.

 

Yes, I had read that PR/Marketing bs before asking. As you had attached it to the first post of this thread, it was hard to be missed.

To be honest, it was more of a question (and also that of @bluekawala in the linked post) _how_ the E-Diff works. The PR text emphasizes on a particular level of innovation (in 2004) along with a list of three components making up the E-Diff. No word about what actually makes it great.

Also Wikipedia (and other popular sources on the Internet) are your friends: https://en.wikipedia.org/wiki/Limited-slip_differential#Types

That being said, I would consider the most simple conceivable version, an E-Diff that simply sets different fixed levels of torque differences based on the Manettino setting. It could, however, be a whole lot more sophisticated based on speed and torque levels and so on.

Cheers,
TS

 

Hi guys,

I was talking with the Ferrari mechanic the other day about the functioning of the F430 E-Diff. What he basically said is that the electronics are capable of dynamically adjusting the differential in the full range from 0% lock to full lock in a quite sophisticated way (this was new for me).

Also he added, that - in his opinion - while there has been rapid and noticeable improvements to e.g. the gearboxes with the more modern cars, the recent E-Diffs (i.e. 458's, 488's) have a quite similar feel. There are differences in how the Diff itself is constructed nowadays and, of course, regarding the solenoids, which have been deprecated as far as I have understood. But these changes are more on the reliability/build cost/quality side of things. What he essentially meant, is that the 15-year-old F430 E-Diff is still quite close to the modern-day E-Diffs functionality/performance-wise. At least much closer when compared to other components of the car.

Maybe that's helpful, maybe not. I found it quite enlightening.

Cheers,
TS

 

Can someone confirm if this is still true. Is getting the genuine Ferrari F430 accumulator equivalent to getting the FIAT part (which can only be ordered from Europe it seems)?

The three part numbers I have seen are:

1. Part# 247346 on algarferrari.com
https://algarferrari.com/store/accumulator-34219
2. Part# 58552368 (with ?requirement for 58552368-s Union Kit) from Ricambi
https://www.ricambiamerica.com/car-diagrams/ferrari/v6-v8/430-group/f430-05-08/power-unit-and-tank/58552368-f1-accumulator-bottle.html
3. Fiat Part# 71751195 from Ebay in Europe
http://shorturl.at/gmxG7

I am getting confused as to which is the right one to buy. Any help would be appreciated.

Thanks.

 

I'll bump the thread. I'm always interested in non-ferrari original OEM parts! Anyone change the accumulator out? Seems pretty straight forward, but any info would be helpful.

 

I might be wrong but from what I understand E-diff is basically another word for torque vectoring. McLaren and Porsche (and only recently Lamborghini) do this by using software to tell car to brake the inside wheel, the mechanical diff then sends torque to outside wheel. E-diff uses electronic control to increase or decrease torque split in rear wheels as applicable, it's considered a better system due to less wear on inside tires/brakes in track sessions.

Overall it's a pretty advanced system imo especially considering it's implementation in 2004

 

Part number 71751195 fits on the 430 and restored my over running pump just fine. I also saved $300 on the overpriced "Ferrari" accumulator. For $120 shipped from UK I got the EXACT accumulator with nearly identical markings and all as what was on my car from the factory.

Many sits cross reference this part to other numbers so don't be too worried as long as it fits the same cars in general.. like a 500 1.2 8V LOL.

 

Search for US Patent 7641585. It describes the system and the control strategy very well.

USPTO.GOV is the most direct method.

My conclusion is that a leaking solenoid would be bad for pressure loss, but a goofy controller making the solenoid act when it shouldn't would also be bad. A good servo system working on bad feedback information would do that

 

Other interesting patent reads are the clutch which is 6,918,478 and the F1 box which is well described in 8,041,486

enjoy

Steve