Unsteady torque curve

[Blackwell808]

Hey all, what would cause my torque curve to be all over in this photo I’ve attached of my dyno run/tune. Car runs and pulls fine other wise nothing out of the ordinary. Merry Christmas!

 

[gt347mustang]

Smoothing at 5 and same scaling as your horsepower and that torque will look much smoother. Have the shop print you out a new copy.

 

[Blackwell808]

Smoothing at 5 and same scaling as your horsepower and that torque will look much smoother. Have the shop print you out a new copy.

Can you elaborate more? I apologize lol. What do you mean by smoothing at 5? Is it just the way the shop recorded/printed it out?

 

[SecondhandSnake]

Can you elaborate more? I apologize lol. What do you mean by smoothing at 5? Is it just the way the shop recorded/printed it out?

Yes, the "smoothing" is effectively how it's displayed- how much it's smoothed/filtered from the raw data.

But the bigger factor there is the scaling. Your torque is only displayed over less than 100 ft-lbs, so you're seeing every little bit of noise in the data. It's like it's zoomed in. Zoom out a little and it will look better. After all look how relatively smooth the horsepower looks. It's displayed over the span of 400 hp (units.) If you change your torque scale to display from 350-750, it will look a lot smoother.