Power and Torque curves

Are there graphical power and torque curves per car available in AMS2?
Or will it be in te future?
I use his to set the redline in Simhub

 

Hello, I am wondering the same thing for the same reason: I noticed on some old F1 cars that there's a powerloss near the rev limiter, it would be nice to find it.

Also, I don't know how realistic the old F1 cars are, maybe I should check the power curbe of the actual cars?

For cars like MP4/7A, I guess it should match the real engine but for some "generic" cars looking like the Williams FW14B or the Ferrari's, I don't know if they are equal to their real life counterparts.

If someone could enlighten me, it would be great!

Thanks in advance for that!

 

Well you can use telemetry to see the torque and power curves. That’s what I use

 

Thanks for the info, indeed, it's a bit tricky to do during a hotlap but I can definitely do that during a slow lap, thank you for your help!

 

I had a look - you can get Engine torque from telemetry as well as RPM - i then was unsure how to get wheel torque/power from those given that you have to know the gear ratios which appear to be unavailable in both the shared memory and UDP telemetry (the former contains more information than the latter). I graphed samples of each and was able to see e.g. an engine torque curve and power curve. I left it there, but does anyone know if there is a way to extrapolate the appropriate wheel torque curves so we can work out e.g. optimal gear shift times from the information available in the telemetry?

 

I don't specifically know what the graph is, but in my MOTec workspace I have a graph for it which shows when to shift

 

Suspicious

 

Check for yourself

 

Gear ratios are available at "advanced setup" pages.
Then you can obtain "final torque per gear" multiplying base torque data by final ratio per gear.
Plot each gear curve to obtain graphically the ideal shift point when one trace cross over the other.
There you can also calculate minimum rpm per gear accordingly.

You will see that in AMS2 most cars do have optimal gear shift point at redline.

As @Racinglegend1234 said you can do it using MoTeC or you can have a complete knowledge base visiting "Your DataDriving".

 

Sorry, what i mean is, as far as I understand it MoTec doesn't have a way to know about the gear ratios unless you put them in explicitly. The telemetry itself output on the UDP or shared memory doesn't appear to have the gear ratios available, so in theory I could mess up the gear ratios and move the shift points around. My assumption is that Motec is doing an approximation, unless it works it out some other way from other data that IS available in the telemetry.

 

Well the telemetry for torque actually changes when shifting so assume it’s taken from the wheel and not the engine

 

In the analysis I did i didn't get different levels of torque - changes in torque will happen at shift because a given gear is more difficult to push so the engine can't "push" as hard as it were... but the wheel torque you'd expect to be higher at lower gears (hence why I constantly spin at turn 5 at Barcelona).

 

I can show you later what I’m talking about, but I got lower torque readings from higher gears

 

If telemetry includes both engine RPM and wheel RPM, it can calculate the gear ratios.

 

You'll need to multiply (driven) wheel angular velocity by 9,549296585514 to obtain wheel rpm.
But remember you'll also need to calculate final torque at each gear to graph ideal shift point.

 

Ohh i think you can get wheel angular velocity... we could have something here! This is the best forum on the internet

 

Some time ago I made a simhub dash for this purpose may be a useful start

 

And if you prefer to use MoTeC you can add this expression for a RWD vehicle:

'Engine RPM' [rpm]*0.104798/(.5* ('Tyre Speed RL' [rad/s] +'Tyre Speed RR' [rad/s])) * 'Engine Torque NBackT' [N.m]

to obtain this;


[Edit] Engine Torque NBackT = Engine torque while Throttle is over 98% to avoid Back Torque data

 

What’s that?

 

(Final or resulting) Torque at each gear
Ideal gear change is when a gear trace crosses the next curve or if they don't cross the ideal point is at redline