Dyno'd my M140i today

[McSwede]

There has been lots of chat on the internet about the addition of a petrol particulate filter to the M140i and about how much power it robs. It think among other VW have quoted a reduction of 10bhp on the Golf R and Audi S3.

My car has a PPF fitted and has never felt lacking in any grunt when the bum Dyno has been in use. The 60-100 time of 5.7s was pretty brisk in my consideration, but hey ho, I thought I'd just stick it on a Dyno and see what happened

Stock power is quoted at 335bhp and 500nm for torque. It did 4 runs and went from a lowest of 355.9bhp & 544nm and a 360.1bhp & 551nm which I'm sure you'll agree is quite healthy. We compared with data sheets from tests on the same Dyno of a non-PPF car and the variation was negligible.

Quite pleased with that!

[Coaster1]

swift but ‘nm’ Grrrrrrr

[Mito Man]

How many killawatts is it?

[McSwede]

swift but ‘nm’ Grrrrrrr

406.397 lb/ft

269.198 KW

[Coaster1]

swift but ‘nm’ Grrrrrrr

406.397 lb/ft

269.198 KW

Now you’re just making it up.

[Foz]

My arse dyno had the M140 at "suprisingly swift"

[McSwede]

swift but ‘nm’ Grrrrrrr

406.397 lb/ft

269.198 KW

Now you’re just making it up.

They are quite correct

[Mito Man]

It’s the cool autumn air

I watched some of Harry’s recent video and he explained that manufacturer bhp figures are tested at 30 Celsius and quite high altitude so in our climate we get more power - it does seem like everyone on here who has been to a rolling road gets more power than the official figure apart from GG’s shonky Porsche.

Then again I remember that the twin turbo V8 M engines were designed to keep mapping themselves so they put out the same amount of power regardless of altitude or air temperature yet owners keep getting 40-60 bhp more out of a standard car on a dyno so it could be utter nonsense.

[JonMad]

360 bhp/400 lb ft - Nice!

[GG.]

It’s the cool autumn air

I watched some of Harry’s recent video and he explained that manufacturer bhp figures are tested at 30 Celsius and quite high altitude so in our climate we get more power - it does seem like everyone on here who has been to a rolling road gets more power than the official figure apart from GG’s shonky Porsche.

Then again I remember that the twin turbo V8 M engines were designed to keep mapping themselves so they put out the same amount of power regardless of altitude or air temperature yet owners keep getting 40-60 bhp more out of a standard car on a dyno so it could be utter nonsense.

Sounds like nonsense. Would they really go through the hassle of finding a high altitude dyno for all their figures.

And anyway - my specific shonky Porsche aside, a significant number of 996s don't make stated power either. YK's GT3, for example, is the exception rather than the rule.

Despite having the coils and injectors changed I still don't think mine is right, which is a pain. There's another SRR £40 saturday in November so I may see if I can get down there and see what we're currently up to.

[NotoriousREV]

Sounds like nonsense. Would they really go through the hassle of finding a high altitude dyno for all their figures.

No, they measure it on their dyno and apply a correction factor to compensate for temp and pressure.

[Mito Man]

A quick google shows up loads of climatic altitude test chambers - not all are necessarily based on a physical high altitude location, some seem to have partial vacuum chambers and others are just simulating the altitude. I’m guessing if you’re going to sell a car internationally you want a power output which is representative of most regions rather than applying to one country only.

[GG.]

Sounds like nonsense. Would they really go through the hassle of finding a high altitude dyno for all their figures.

No, they measure it on their dyno and apply a correction factor to compensate for temp and pressure.

being a bit err... dense on that one.

[V8Granite]

Sounds like nonsense. Would they really go through the hassle of finding a high altitude dyno for all their figures.

No, they measure it on their dyno and apply a correction factor to compensate for temp and pressure.

being a bit err... dense on that one.

Or do it properly and use an environmental test cell. We just controlled air temp, very simple.

Dave!