Need help on the Porsche 718 Boxster S w/ PDK

if you are interested in how AC's datalog matches up to a real car at the same track, check out my post

https://www.assettocorsa.net/forum/index.php?threads/matching-a-real-life-tire-to-ac-tire.49592/

 

I don't have the same car but adjusting the alignment and setting the track to slow produces a remarkable similarity both in feel and lap time. The one thing that still kills me is the lack of g-force. I just don't realize how fast I am trying to corner until the car spins or slides off the track. Careful attention to various queues has really helped. For example, on the long back straight at VIR, noting where the car shifts into fifth tells me which brake marker to use for the slow off-camber turn the at the top of the hill. Until I figured that out I would almost always blow that corner.

 

In my opinion Gfotce is not a very accurate cue anyways

For ex in real life can you tell if you are cornering at 1.5g vs 1.2g?
You can maybe tell if you are experiencing more or less g, but not the exact g

You are more than likely to use the visual cue in real life , which is more accurate
Visual cue as in reference points and sense of speed



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That's true but that's really what I'm talking about. It's hard to explain but it is easier to feel my car slipping when I can also feel g-forces than in the sim where I can't. I need other ways to deal with it in the sim and my approach has been to use things I can see to help to determine what I need to do. I would still use those on a track but I could modify it based on how it actually feels.

As an example, there is a slight turn on a track I drive all the time that can be taken at 125mph or more. I can do that in the sim but the g-forces in real life make it feel like the car is about to be pushed off the track, so lacking enough nerve, I keep it under 115. I have seen people try to take it flat out, suddenly get very uncomfortable and lift, causing the car to spin. It's a subtle point but you miss that in the sim, which is probably why I am usually a couple of seconds quicker.

 

IRL or in the sim I just go by when the tyres dont want to play anymore lol.

Any of that tho is directly related to how good your line is and how well you loaded up the car in a corner so eh.

 

If you want a semblance of a correct driving behavior to compare to your exact IRL car, you would need to make a car mod with identical behavior to your real car. That wouldn't just entail copying the geometry exactly but also tweaking it to actually work in the engine closer to reality. Just copying geometry won't do it. Then you would need to somehow produce identical tire gripping behavior, and on top of that would be things like the differential maybe not even being supported in AC or AC not simulating it well and so on. You can completely ignore things like tire pressure or heating too, don't even try to get those exactly right.

Then when you managed to create that very accurately driving car, the telemetry would still be off due to the simulation being imperfect and running at 333hz and not "infinite rate" as per IRL. You see what I mean?

I would just use AC as a general driver's aid for training overall technique. Not a serious testing and training tool akin to actually driving laps on the track. Even the best sims can't fill that role, I believe.

 

I think you may be over-analyzing this or think I am. I know, for example, if I run an available car on a track I know, it will behave pretty much the way that car would on that track, but it wouldn't be exact. Here I am dealing with a car that is not an exact duplicate but kind of close. All I am after is kind of close behavior. By setting my alignment and tire pressures and selecting a slow rather than optimum track I get performance that is pretty close, and that is about all I can expect.

Sure, a perfect match might produce closer results, but real car and track conditions change all the time, so it would never be exact. However, if I can get something reasonably close, which I think I have, I can use it to hone my skills better than I think I could by selecting some fabulous car I would never own or, if I did, drive on track.