Shift lights and ideal shift points

nismo

New member
Before I get to the topic of this post, I don't believe this is necessarily a bug but I will also at some point talk about a potential feature request. I know that there are specific forum categories for these two things but I'd like to see what people think about this before going there.

Race cars have shift lights on the dashboard or wheel to indicate when to upshift to stay within the ideal part of the powerband. Some cars will make most of their power near the engine's rev limit while some do it a fair bit before, but that's why we have the shift lights so we don't have to guess the ideal shifting points.
However, in LMU I've already seen a few cars where the shift lights are not quite telling us the full story, and while for some this may be common knowledge for others it may explain that bit of time lost on the straights. There's also a mismatch between the in-car shift lights and the shift lights on the UI tachometer which creates even more questions.

The biggest offender currently seems to be the Ferrari 499P Hypercar, where you need to shift it pretty early. I don't know the exact point for the best straight line performance but it seems to be around the last yellow and the first red light on the physical steering wheel and before any shift lights appear on the UI tachometer. While the actual RPM you shift at seems to be correct, when compared to WEC onboards which is around 7600 RPM or so, the shift lights tell a different story.
I've mostly played around with the GTEs and I can tell that the 488 needs to be shifted a bit after when the red light appears on the dash but before you see the third light go up on the UI tachometer and the Aston also needs to be revved a bit after all shift lights turn blue and right as the third light on the UI tacho appears.

I could go on about all the cars in this game and test them further, get some telemetry data with Motec and really get to the nitty gritty, but that's when I realized... What's the point of these shift lights if not to tell us when we should shift gears?
I know most cars' powerbands aren't that consistent, some may require you to rev higher on the first 2 or 3 gears and then short shift the rest in comparison, but I also don't understand why this information needs to be hidden from us. Real teams surely have the powerband of the car and the driver will know how to make the most out of it, so why can't we have this data? Raceroom shows us a little dyno graph on the setup page which is already pretty nice but only really works if the car's displays have an RPM readout, but I wish we could have some Forza-like telemetry page where we can see live readouts of the power output.

I don't know if this is a bug or just a design oversight when it comes to the shift lights not being accurate to the ideal shift points, but I also don't understand why the powerband or dyno graph data needs to be hidden from us. I'd like to see both the shift lights be corrected and to know my car's powerband.
 
They never bothered to nail the shift properly lights in rFactor2. Sad to see this is also the case in LMU.
 
As you said, telemetry is your answer, install Motec (or any other external software) then you can figure this out for each and every situation. What you call optimal shift point will change depending what you want to do (quali, overtake, save fuel, short shift...). Also I hope you do realise that to have real data the teams need to share that, which they might necessarily be willing to do.
 
As you said, telemetry is your answer, install Motec (or any other external software) then you can figure this out for each and every situation. What you call optimal shift point will change depending what you want to do (quali, overtake, save fuel, short shift...). Also I hope you do realise that to have real data the teams need to share that, which they might necessarily be willing to do.
Motec doesn't outright give you any horsepower and torque values, all you get is wheel speed, unless I'm missing something. Doing the math to get it correctly is quite cumbersome too.
For shift points we don't need to know how much power or torque the car is making, we could simply have a dyno graph without power or torque numbers but simply the curve and the RPM. For a Forza-like telemetry overlay we could also have percentages for power and/or torque instead of the actual values, if manufacturers don't want to have power outputs being compared.

When I say ideal shift points I'm referring to the shift points that give you peak performance, since that is the standard. For fuel saving it's common knowledge you shift earlier, but for peak performance revving the engine all the way isn't the always answer.
Take the 499P again, revving past ~7600RPM will make you go slower and consume more fuel. I believe the reason some engines let you rev well past the peak of the powerband is to allow for stronger engine braking, for example.
 
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This gives you a lot of info on your rpm and their impact with power, especially the right graphs, the gforce per gear per rpm tells you when the power starts to go down.
 
The problem with G force is that you need to subtract the effect of drag. Without a drag coefficient it requires a fair bit of guess work and other tests that aren't very easy to do unless you have a perfectly flat road.
I know that G force can already tell you a lot, but I'd rather have more accurate data. Other games have done it, I'm sure S397 could get the manufacturers to agree with showing us at least the powerband.
 
The problem with G force is that you need to subtract the effect of drag. Without a drag coefficient it requires a fair bit of guess work and other tests that aren't very easy to do unless you have a perfectly flat road.
I know that G force can already tell you a lot, but I'd rather have more accurate data. Other games have done it, I'm sure S397 could get the manufacturers to agree with showing us at least the powerband.
The effect of drag is not applicable in this case as in the gear n to n+1 transition window you operate in the same car configuration. The differences between optimal and sub-optimal RPM for upshifting is so clear that all other factors can be ignored. See Arisdrives TL;DW video on the exact subject.
 
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