[WTruter]

I have a 340i with MPPSK.

Thought I would take it to my local Dyno to see what power figures I have.

They use a "Mustang" dyno which from research seems good and accurate.

The power @ wheels were only 294hp. Obviously a bit disappointed and expected much higher.
Looking at the DMS thread, Chris-c got a 372.2hp on his MPPSK car (Prior to DMS map).
Assuming 12% losses, my 294 hp would translate to 334hp @ fly. quite a way off the 372 achieved by Chris.



I did wonder if the engine map from the MPPSK may not have been correctly applied or wiped after recent warranty work (Car is now out of warranty).

Checking through various posts, it seems the in car power figures should be reading 370-400. After several attempts, the best I could achieve was around 365 (Assuming each square is 25hp)

I've spoken to my local dealer and they can check the ECU but will be charge a diagnostic fee of around £85 if everything is found to be OK. £0 if the MPPSK tune has not been applied and needs to be re-installed.

I want to be extra sure before taking to BMW for obvious cost reasons.

Can anyone confirm if my figures seem correct?
Do they appear more in line with a non MPPSK car?

[Sasquartch]

Forget the idrive dials, they are not measuring anything, just indicating what the ECU thinks it ought to be

[Abzynthe]

To be honest, you cant compare your figures to Chris-c figures as they were done on different dynos.

[WTruter]

Originally Posted by Abzynthe

To be honest, you cant compare your figures to Chris-c figures as they were done on different dynos.

Different Dyno's yes, but both dyno brands are considered good/reliable and I would not expect such a large variation between the 2.

[NISFAN]

As above, it's not easy to compare one dyno type with another. 294 at the wheels seems a little low, but could be fine on a Mustang. Dynodynamics have MPPSK around the 300-310 whp mark IIRC. In fact look for the Surrey rolling road thread to see the full tables.

Edit* lowered the WHP numbers for MPPSK after consulting the spreadsheet masters file. MarkG_M3CP

There is a dyno finder on the dynodynamics site which will get you to the more common type used. Are you far from Farnborough? Surrey rolling road has dyno'd many MPPSK 340i for comparison.

[WTruter]

Originally Posted by NISFAN

As above, it's not easy to compare one dyno type with another. 294 at the wheels seems a little low, but could be fine on a Mustang. Dynodynamics have MPPSK around the 310-320 whp mark IIRC. In fact look for the Surrey rolling road thread to see the full tables.

There is a dyno finder on the dynodynamics site which will get you to the more common type used. Are you far from Farnborough? Surrey rolling road has dyno'd many MPPSK 340i for comparison.

I've had a quick search for the SRR day threads but not found it yet.

Would consider a trip down for a rolling road day and meet some people, but a bit far to just go for a power run. (Live just south of Coventry)

[NISFAN]

You are sh*t at searching

[NISFAN]

MarkG_M3CP
Here you go guys, the compiled results...

Ranked in order of gain:

Attachment 1687795

Attachment 1687796

For interest, an overlay of the 30d engines:
Red = DMS remap
Blue = DMS remap
Green = Bluespark
Pink = DTUK

Attachment 1687797

[WTruter]

Originally Posted by NISFAN

You are sh*t at searching

Found it now, but when searching it was on page 2 of the results. Seems the mobile app is better at searching.

@nisfan,

Thanks for the results. Seems like both the 340 and 440i both with MPPSK got around 300 hp @ wheels. So difference there could be dyno differences as its soo small. So seems car is good and power as expected.

Thanks for the help.

[330XDave]

Bloody hell those DMS remaps exploit some power and torque don't they? Has anyone had any issues with reliability on the 30d pushing so much power out?

[chris-c]

Seeing SRR showing 300-305whp means your 294 is 2% lower than SRR's reading.
Do you not think that is within an acceptable margin of error?

I'm taking my figures with a pinch of salt. The gains are impressive and the car has been transformed but I'm still not sure if I believe 444bhp calculated.

[WTruter]

Originally Posted by chris-c

Seeing SRR showing 300-305whp means your 294 is 2% lower than SRR's reading.
Do you not think that is within an acceptable margin of error?

I'm taking my figures with a pinch of salt. The gains are impressive and the car has been transformed but I'm still not sure if I believe 444bhp calculated.

Chris,

Yes, seeing as 2 other b58's with MPPSK got around 300hp @ wheels, I am happy to go with my 294.

Just thought it best to double check as i've seen high figures stated for the mppsk and mine was much lower than expected.

[chris-c]

One of the early SRR days saw MPPSK cars show more like 380-390. The same cars a year later showed 360-370.

[Hooded]

Originally Posted by WTruter

Chris,

Yes, seeing as 2 other b58's with MPPSK got around 300hp @ wheels, I am happy to go with my 294.

Just thought it best to double check as i've seen high figures stated for the mppsk and mine was much lower than expected.

Yep stick yours on a different dyno and you might get 300hp @wheels too.

MPPSK is supposed to be 355bhp? not 370+

[chris-c]

Original paperwork shows mppsk at 355bhp. Newer paperwork shows 360.
When I got mine done it clearly states 360bhp.

[Hooded]

Originally Posted by chris-c

Original paperwork shows mppsk at 355bhp. Newer paperwork shows 360.
When I got mine done it clearly states 360bhp.

Maybe BMW realised they make 360 and not 355 then.. not bad 34bhp more than stock

[chris-c]

Yup. If you check the thread in the B58 section about B58's it shows 355bhp for the MPPSK. When I got mine I took a photo of the details of the kit in the showroom and it clearly showed 360bhp.

Either way the MPPSK is still a very decent improvement. The power is noticeable as I went from a non mppsk to a mppsk back to a non mppsk car and you could certainly feel the difference. Then the sound. Holy hell the sound makes the difference!

[Wills2]

Although 360PS/HP (metric) is 355BHP (imperial)

[chris-c]

Originally Posted by Wills2

Although 360PS/HP (metric) is 355BHP (imperial)

Every day is a school day. Ta.

[Watsey]

Originally Posted by 330XDave

Bloody hell those DMS remaps exploit some power and torque don't they? Has anyone had any issues with reliability on the 30d pushing so much power out?

I've had the DMS map on my 30d since September last year. The car has done about 15K miles since then (80K on the odometer now) and a couple of EVO track evenings when things obviously get pushed pretty hard. Zero problems thus far and the engine runs smoothly.

I always use BP Ultimate and Millers Oils additive, every tank, on the assumption that this will keep the engine internals as clean as possible as well as benefitting from the Cetane boost.

The only dip in fuel efficiency (~3mpg) was when BMW applied a software update without my permission (the DMS map had to be re-applied) presumably as an 'under the radar' diesel-gate emissions adjustment.