Recent content by scherzkeks

The "claims" are facts that have been published by Audi AG or Haldex themselves. There is nothing in my posts that is not available from the source. The claim that the system "can send 100% of torque rearward without being in a 100% slip condition on the front axle" was never made. What I said...

Good. Disprove what I have said if you have issue with it. Perhaps you'll make more sense than veeeight. 1. Haldex 4 and 5 are predictive and proactive 2. The systems are faster at directing torque than a purely mechanical system 3. Haldex is generally better on mixed surfaces. Several Sport...

This is not really true anymore. Haldex Gen 4 (facelift S3 8P) and Gen 5 are proactive. The clutch pack is controlled by the ECU, and requires no driveline slip to lock up. On launch/acceleration, the cars are programmed to lock the clutch pack meaning you have 50/50 mechanical split. Also, when...

Herlin clearly states a rough figure of 10%, depending on the manufacturer. And as mentioned to you, the figures for Audi used to be on the homepage under the lexicon. Here is an old German press release for the last TT coupé confirming that under normal circumstances 85% of the power is on the...

Yes and no. It has revised front roll center geometry, can run wider tires (255 section width), and has a lot more aluminum in the body shell. It's a bit less compromised than an S3, but obviously not as practical.

Not at all. The key word was "theoretically." I was simply pointing out that there is nothing stopping engineers from creating a Haldex setup with a fixed rear-biased torque split. Configuring the existing open front diff to allow a fixed degree of slip would be one potential way to do so. XWD...

I agree in part. As mentioned earlier, I have an S4 with sport diff. Compared to my old S3 8p, it is a tick better dynamically, but the sport diff seems to add more of a "rear steer" effect rather than any real tail-out action. I was curious if the new S3 and Golf R would be similar since they...

It does. I think, as usual, the RWD 1er will offer a tick more involvement, but will suffer from traction issues and typically be slower on anything but a very tight circuit. With AWD, there isn't much you can do to increase involvement other than to bias the drive system heavily in favor of...

I don't see it. Power oversteer is nearly impossible as Audi's AWD systems are set up to equalize axle speeds, avoid slip/traction loss, and provide optimal traction on mixed surfaces. The latest trickery like the sport diff on my S4 and the advanced XDS/EDS on the S3 allow torque vectoring to...

This is just perpetuating myth. I have owned two Torsen/mech. Audis (including my current S4 with sport dif) and one S3 sportback (8P). The Haldex and Torsens are set up to function nearly the same on the road with both having slight advantages and disadvantages. The Haldex can and does...

For Gen. II, the amount of rear wheel engagement varied by manufacturer and even among models in the range. Audi previously stated 15% on their old website under the lexicon. Other than that, you have a link already -- Herlin confirms between 10-15% for the Gen. II and points out that this...

So it is either 15% or 15% that can tapers down to 10%. Even assuming you are right (which I know you are not, as the 15% figure has been published by Audi AG), I don't see the issue. As for the rest, you clearly don't even understand how your own MOT RR dynos work for brake testing. What...

It is clutch pretensioning, and it means that 15% of the torque is on the rear wheels. The Haldex fully disengages on braking as it is electronically triggered to do so, and there is no reason for it to stay engaged. It does not disengage fully when cruising on a motorway. It is possible in...

Regarding rear tire wear, the reason your rears wore faster than the front is that with Haldex 4, the rears get about 70% in acceleration scenarios. Also the clutch pack can lock up independent of slip, so rear wheel engagement is much higher than on previous versions. My old S3 8P Sportback...

There is some misinformation here. First, there is always about 15-20% of torque at the rear wheels, it is never 0%, unless the rear is on glaze ice and the front has grip. This factoid used to be found on the Audi site too, under the lexicon section. Second, it is possible to apportion more...