APR vs Racingline

[RoddersUK]

Quick replot, will be slightly inaccurate, but cross around 5250rpm.

 

Sleep easy JR...... 😂

Edited 7 June, 2023 by RoddersUK

[EnterName]

9 hours ago, J.R. said:

Nope, clear as mud.

 

I'm thick as mud as well which is probably the reason for the lack of clarity.

 

I wont lose sleep over it though!

No worries, let me clear things up, though I think Rodders has pipped me to the post.

Here is data from Rodders original power graph. (The red curves.)

So if you look at the power curve, reading from the x-axis, the one that runs left to right on the bottom, showing RPM, and see where the power curve intersects it for 5250rpm, look at the Y-axis for the power curve on the left of the chart, you get approximately 236BHP. (When I first looked, I got 235BHP, but using a more accurate method, I see 236BHP)

Now if you look at the torque curve, reading from the x-axis at 5250rpm, look at the Y-axis for the torque curve on the right of the chart, you can see it intersects at 320Nm.

Bear in mind the intersection of power and torque at 5250rpm is BHP and ft/lbs, so we must convert that 320Nm to ft/lbs, which works out at 236 ft/lbs.

(Here's a tool for just that conversion. https://www.unitconverters.net/energy/nm-to-ft-lb.htm)

So the curve looks spot on to me. Here's an illustrated version of what I've explained. If this doesn't clear things up for you, I don't think I can make it any clearer.

 

Of course, why the measured torque curve is very different to VAGs claim of torque for the engine is a different matter!

 

 

 

Edited 7 June, 2023 by EnterName

[Dooge]

Following with interest. What did the mapper say regarding high torque figure other than 'its normal' @RoddersUK?

[RoddersUK]

Just one snapshot of the engine, not a full load Dyno, ECU will learn.

 

Posted on a Facebook group and Ben from Racing line saw it. Assured me everythings ok, but said I could go up there and FOC Dyno run my car, just so he can show it's all good.

[Gizmo]

Ben really knows his stuff so if you’re passing I would take him up on the offer. 

[RoddersUK]

Said I'd arrange something with him once the kids are at the grandparents. Bit of a trek and they wouldn't enjoy it at all.