hp gauge says I top out at around 560hp?

[m5bbq]

so I have M5 comp, all stock. My sport gauge needle tops out just hair below 560hp mark on the sport gauge. Is this accurate? I thought I should have around 570hp? That's after flooring it all the way to redline in 2nd gear.

[M5Rick]

After a while all performance cars lose a few hp due to usage wear.

[m5bbq]

do you know how they calculate the hp on the gauge? is it by acceleration?

[M5Rick]

I have a 2013 which hasn't got this gauge option but it's probably info from ecu on some later lci models.

[m5rosco]

Originally Posted by m5bbq

do you know how they calculate the hp on the gauge? is it by acceleration?

It's all just a guess based on load/rpm etc. It doesn't actually measure anything! Waste of time really!

[m5bbq]

ah cool thanks! I'll just ignore it then.