[MEGA]

Hi all,

had my car run down at Red Dot at the weekend.

Before I ask any questions at all, what do you think of the power its putting out? I have a couple of things I am not happy/sure about but don't want to skew your opinions by asking ahead of time

What do you think?

[Carrera RSR]

318d ?

[willhollin]

Originally Posted by carrerarsr

318d ?

Very similar.

[MEGA]

I need comments of other people who've dyno'd their cars, not people who've read a spec sheet

Sorry to be narky but yes I know it should be 163, what I want to know is if the figures above are ballpark normal or not. REAL WORLD. Not on paper.

Who else has dyno'd their cars?

[willhollin]

Originally Posted by MEGA

I need comments of other people who've dyno'd their cars, not people who've read a spec sheet

Sorry to be narky but yes I know it should be 163, what I want to know is if the figures above are ballpark normal or not. REAL WORLD. Not on paper.

Who else has dyno'd their cars?

Sorry must have misread your first post.

[MEGA]

No you didn't - My response was cuntish. Sorry dude. Just had to get it in before it becomes a topic about paper vs reality

I'm not sure if theres an explanatory link between my SHITE average mpg, and the graph above.. or if indeed most 320d's come out at this sort of number in reality pre-mapping etc?

[Carrera RSR]

Put the reg of the car prior to your personal plate change in to this website

https://www.mycarcheck.com/

[MEGA]

What on earth for?

[Carrera RSR]

Your obviously concerned its putting out less power than it should be. You need to find out why. Is it a 318d? Was it a 320d now sporting a 318d engine? Is there a problem with the 320d engine?As the 318d and 320d are the same engine just a running different output specs there could be something amiss. The guys at Evolve should be able to put you straight on the engine front outputs etc. But thought checking the cars original V5 spec might be worth a start.

You have asked for assistance. Please don't bite our heads off for trying

edit, thanks for editing your previous post.

[MEGA]

I bought it with a full service history from BMW AU. I don't think thats what the problem is

I am however, concerned theres an over fuelling, air filter, MAF, some kind of issue like that..

Irritated, should have gotten the dyno guys to put the AFR on the graph for me..

[Carrera RSR]

Originally Posted by MEGA

I bought it with a full service history from BMW AU. I don't think thats what the problem is

I am however, concerned theres an over fuelling, air filter, MAF, some kind of issue like that..

Irritated, should have gotten the dyno guys to put the AFR on the graph for me..

Got the wrong end of the stick. It sounded like you were concerned with its provinence, not that its needs some kind of fuelling tweak. The latter being an easy fix than the former.

[Hotcoupe]

Originally Posted by MEGA

Hi all,

had my car run down at Red Dot at the weekend.

Before I ask any questions at all, what do you think of the power its putting out? I have a couple of things I am not happy/sure about but don't want to skew your opinions by asking ahead of time

What do you think?

The flywheel figure looks too low for a 320D, which based on your later post regards your fuel consumption might be linked.

I'm assuming your car is manual?
What gear did they run it in?

How confident are you in the place? and the operator who ran the dyno?
(Based on your post, I'd hazard a guess at you not being sure)

Dave, have a read of the link below, plenty of info there.
I'm sure there is a dynograph in there somewhere for a 320D, albeit after a remap/or a tuning box, can't remember which, but should give you some food for thought.

http://www.e90post.com/forums/showth...y+rolling+road

[Carrera RSR]

Contact Evolve. I know this link is for a 177bhp but I am sure they can give you some 163 info.

http://www.e90post.com/forums/showth...lve+320d+remap

[E92Fan]

Originally Posted by MEGA

I bought it with a full service history from BMW AU. I don't think thats what the problem is

I am however, concerned theres an over fuelling, air filter, MAF, some kind of issue like that..

Irritated, should have gotten the dyno guys to put the AFR on the graph for me..

Firstly, you need to consider how accurate the dyno you have used is. There are of course various dyno machine manufacturers, but for comparison purposes you need to seek out a Dyno Dynamics machine (perhaps at Evolve in Milton Keynes). With a DD printout, there is then a basis for comparison with other vehicles here in the UK for which we have dyno figures for.

Secondly - let us assume for a second that the dyno you used is accurate. You need to find out how the flywheel figure has been calculated - was it calculated by the dyno machine, or the operator, and what scaling figures were used to create the flywheel figure? Alternatively, do you know what the wheel horsepower figure is ??

Thirdly - now let's assume that all the data is accurate, and your car is therefore showing approximately 8% less power than what it should. You mention that you are also getting poor MPG figures - what sort of figures are you getting? There is definitely a relationship between loss of power and poor MPG - the most likely cause of this is a blockage in one of the filtration systems - either the air or the fuel. It is quite surprising how detrimental to performance a clogged air filter can be. The MAF (mass airflow) sensor sits behind the airbox and as long as you haven't used super oiled filters, or changed the air intake to an oiled cone or such like, it is unlikely the surface of the MAF will be clogged up, unless there has been a catastrophic failure of the air filter itself. There haven't been many cases at all of MAF sensors failing on BMWs (unlike the high failure rate of the MAF sensor on the old Audi 1.8T engine)

It may be that your engine ECU needs a reset, with all the adaptations reset as well. That is something your local dealer can do, and as long as they are friendly and understanding, they shouldn't charge you too much for the work (if anything at all).

Is your car still under warranty? If it is, then I suggest a visit to a GOOD dealer to have your car checked over. It certainly doesn't seem right. If it is out of warranty, then I'll put you in touch with Birds garage in Uxbridge who can investigate the matter for you (at half the labour rates that BMW main dealers charge).

Hope some of this helps...

[MEGA]

The above is calculated wheels Torque, not flywheel. So circa 20% change needed. I also know Red Dot to be accurate. For all the other info though thanks alot (Hotcoupe / E92Fan)

[E92Fan]

Originally Posted by MEGA

The above is calculated wheels Torque, not flywheel. So circa 20% change needed.

Wait a minute - the original 161bhp 320d engine (which is in your 2006 E90) gives 340Nm of torque at the flywheel... 340Nm is 250.74 lbft torque at the flywheel.

Assuming that there is anything from a 15% to 20% transmission loss, that 250.74 lbft of torque at the flywheel would equate to anything from 200.59 to 213.13 lbft at the wheels.

So your car isn't too far off the wheel torque figures.... ??!!

Why do you think there needs to be a 20% change ??!! Are you expecting the car to give 250-odd lbft of torque at the wheels?? If so, you're getting confused by the figures given by BMW (which are all calculated at the flywheel) and the torque figures given on the rolling road, which are accurate at the wheels only...

[dxb335d]

Some cars will come out the factory with less power than factory quoted figures some will come out with more. Could be completely fine.

Map her anyway.

[jinjur]

Interesting post MEGA............I suspect that we have the same stuff going on here.......Sh!t MPG / Poor Performance

I know my car has a 320D in it (first thing i asked the stealership where it was checked) - no error codes incidentally. When i mentioned poor MPG to me they simply pooh poohed me off......

I am going to RR mine albeit at a different place (limited for them here in NI) so that might prove interesting. If it aint up to power then there is obviously a problem.......if it produces 163 (ish) then i will just have to accept that mine has awful MPG and live with it as long as i can until i find a different car that i like......possibly Audi as their figures rock.

I had read somewhere about the vanes on the variable vane turbo sticking......I wonder could it be something daft like this where the turbo doesnt adjust or higher rpms? Cant remember where i read it but i remember there was no error codes logged for it and only a boost check revealed it i think....

Anyone know how else we could check that?

Cheers
Jinj

[dxb335d]

How awful are your mpg figures.

[jinjur]

Hi dx,

Dont want to pull attention from MEGAs thread so ill keep it brief

http://www.e90post.com/forums/showth...=226106&page=3

mid to low 20's........... just got 420 from a BRIMMED tank.




Is your economy that bad MEGA?

Cheers
Jinj

[MEGA]

Miss daisy cruise control at 70 gets 46ish.

Commute to work, 30 tops. Spirited drive on Saturday returned 22.

On all the above, I know Torque is OK. But HP is down..

[dxb335d]

In all honesty guys, You wont get decent mpg from commuting in start stop and also if you drive eagerly everywhere else.