Need to plot Torque

[pstoppani]

I see Torque in the data types but I'm not seeing where/how this can be connected to a calculator. Am I correct that there isn't one? Will there be one soon or do I need to do this in Excel, or, gasp, use my DL1?

I really want it do be shown on the video :)

[RandallNoll]

There should be one soon.

I think you could do it currently using acceleration force, vehicle weight, and a lot of math. I did it in excel, but haven't yet tried in DashWare. I'd just wait until it's built in.

[tristancliffe]

I don't think displaying a graph or using the data will be useful. The torque channel will be, at best, an estimate, and will vary massively over a single run. It might tell you you have a peak of 50lb.ft or 500lb.ft on the same run.

If you want to display a decent torque curve, then get your engine on a real dyno and create a curve from that. Then use some cleverness to make a dot move along that with RPM. Some sort of point following table lookup thingy.

[RandallNoll]

It's actually kind of neat. It may not be horribly useful, but it does illustrate some interesting things. Having done this on one of our customer's files, there were some neat observations.

What you are really measuring when you calculate torque is net force--what is propelling the car forward. But because you are measuring it off of true real-world acceleration, it's the net of all forces acting on the car (engine, tire friction, aero, driveline loss, etc.).

I knew the approx torque of the engine I was logging, so I used that to plunk in a correction factor at low speed, which turned out to be about what I'd expect from drivetrain loss (20% ish) and let the numbers fall. It's somewhat sobering to see how much torque/acceleration is limited by outside factors, especially once you get up to speed. It's also interesting to watch the calculation at part throttle and see really how much "power" you're using as you roll the throttle on coming out of a corner.

All in all, it's really just converting acceleration (G's) into a number that may make more sense to you, but it is kind of neat to know that while you have an engine that makes XXX torque, you are only experiencing that level of torque a small percentage of the time.

[pstoppani]

It is a very useful tool for measuring power changes due to tuning tweaks in the real world; dyno's have there own issues with respect to accuracy..

So, yes, I'm looking for changes to peak torque between tuning changes.

I look forward to having this built-in. Thanks.