[rfm4000]

My eLSD reader constantly shows 2% slip (or higher) while just coasting.
at dead stop it shows 0, which is correct.

What does everyone elses read when just cruising? Under acceleration? Obviously I understand under acceleration it will be different.

Thanks in advance

[Pollock]

Mine is at 0 when driving straight.

[Stocktastic]

2%

[Pollock]

I paid closer attention driving this afternoon. It goes between 0 , 1, and 2 percent. But its usually 0.

[R3ctivision]

I also see 2% a lot.

[Boost Creep]

I always thought that was an odd display.

Is the 2% the speed difference between the shorter front tires vs the taller rear tires?

I vaguely remember seeing 0-2% while driving, but it's not something I'm going to monitor much while driving around the streets. I'll look tonight when I take the car out.

[Alpha1BC]

I saw 1% on mine this morning. I'd guess that this display measures LH vs RH rear wheel speeds to calculate the slip, and if that's the case I'd think 0-2% is normal for straight line driving. There's going to be a slight difference in rolling radius of the tire based on corner weight, tire pressure, and even a little bit of the tire's construction itself. I'd also not be surprised if there's a tiny bit of an error between the wheel speed sensors. Could be other sets of sensors on the car, but wheel speeds make most sense to me.

I'll do some poking around to see if I can find a more solid answer, because now I'm curious how it's actually calculated as well lol.

[Alpha1BC]

Originally Posted by Alpha1BC

I saw 1% on mine this morning. I'd guess that this display measures LH vs RH rear wheel speeds to calculate the slip, and if that's the case I'd think 0-2% is normal for straight line driving. There's going to be a slight difference in rolling radius of the tire based on corner weight, tire pressure, and even a little bit of the tire's construction itself. I'd also not be surprised if there's a tiny bit of an error between the wheel speed sensors. Could be other sets of sensors on the car, but wheel speeds make most sense to me.

I'll do some poking around to see if I can find a more solid answer, because now I'm curious how it's actually calculated as well lol.

I was wrong, found the answer on the Corvette forums here.

In short, the eLSD % number is the percent of lockup the eLSD is at. 100% corresponds to max lockup which I think is a differential breakaway torque of 2000 Nm (high performance supplement says 200 Nm, but my guess is that it's a typo based on the corvette forum response. 200 Nm seems like a really low breakaway torque).

The wheel slip number is showing the average rear wheel slip vs. the average front wheel slip, so a small percentage when driving should be expected.

For the more in-depth wheel slip description, this value isn't to be confused with different rotational speeds from different rolling radius in the front vs. the rear. In order for a tire to produce traction forces, there has to be some amount of slip. In the case of driving straight, this means that the rear driven wheels are actually spinning slightly faster than you'd expect based on rolling radius and vehicle speed. The reverse is true for any non-driven wheel or when braking; those wheels will actually be spinning slightly slower than expected. The faster you go, the larger this slip ratio becomes because more tire traction force is required to overcome aero drag. At 0 speed it should be at 0 (but per the post above, sometimes this number calculation doesn't do a good job at low speeds). At 45 mph, I was seeing 1% wheel slip. I'd imagine at highway speeds, it's possible to see 2 or even 3% wheel slip.

[rfm4000]

thanks for the response. glad this got cleared up!

[Eldi Z]

Dumb question: How do I configure to be able to see the eLSD display?

[Boost Creep]

Originally Posted by Alpha1BC

I was wrong, found the answer on the Corvette forums here.

In short, the eLSD % number is the percent of lockup the eLSD is at. 100% corresponds to max lockup which I think is a differential breakaway torque of 2000 Nm (high performance supplement says 200 Nm, but my guess is that it's a typo based on the corvette forum response. 200 Nm seems like a really low breakaway torque).

The wheel slip number is showing the average rear wheel slip vs. the average front wheel slip, so a small percentage when driving should be expected.

For the more in-depth wheel slip description, this value isn't to be confused with different rotational speeds from different rolling radius in the front vs. the rear. In order for a tire to produce traction forces, there has to be some amount of slip. In the case of driving straight, this means that the rear driven wheels are actually spinning slightly faster than you'd expect based on rolling radius and vehicle speed. The reverse is true for any non-driven wheel or when braking; those wheels will actually be spinning slightly slower than expected. The faster you go, the larger this slip ratio becomes because more tire traction force is required to overcome aero drag. At 0 speed it should be at 0 (but per the post above, sometimes this number calculation doesn't do a good job at low speeds). At 45 mph, I was seeing 1% wheel slip. I'd imagine at highway speeds, it's possible to see 2 or even 3% wheel slip.

Checked it out last night, like posted the yellow top read out is the lock up percentage of the eLSD. Just cruising it is very low as you don't need posi lock up. Accelerate from a dead stop and that percentage will jump up as the eLSD fights for traction. Mild pull and I got it to jump up to 52% pretty easily.

Lower display is a bar graph of what would be considered rear tire slip. Cruise is nothing, slowing down is nothing, but acceleration gives you a reading. Hard acceleration from a low speed will light up the graph pretty good. Mild acceleration while cruising will light up a bar or two.

[Wallbank]

Originally Posted by Eldi Z

Dumb question: How do I configure to be able to see the eLSD display?

It's in the performance tab. If you don't see it you might need to go into settings and add the page

[Eldi Z]

Originally Posted by Wallbank

It's in the performance tab. If you don't see it you might need to go into settings and add the page

Thanks for guiding me.
How can a page be added in the settings?

[Ventura 1LE]

I would think it has to do with the road as well. Highways tend to drain better and slight difference in the grade from left to right of the road surface. Also a long sweeping turn with the grading of the highway will tend to make the rear slip a bit more.

I have noticed with tracking the car on CW track the left side tire are a bit more worn than the right and my is at 1% to 2% constant now on a flat road with very little grading.