BMW and M Power Owners

Dis86 · 18 Nov 2018 at 17:57

Amleto said:
Hi Guys,
in your experience how accurate are trip comp MPGs? In my mondy I know it was accurate within ~1.5 mpg, however my 4 series is way out on several refuels. I'm hand calculating 27-28mpg each time, and each time the dash is showing 32+mpg. Is there a way to recalibrate it?

Keep in mind that just because a journey shows as being x miles it's not necessarily the case. You will have sideways movement and swing out wide on bends etc. Otherwise if you're going off the trip comp then yeah...pretty far off!

Amleto · 18 Nov 2018 at 20:38

You been drinking from the special juice again? Sideways movement and swinging out wide? I don't do donuts so don't see this as relevant

Dis86 · 18 Nov 2018 at 20:40

Amleto said:
You been drinking from the special juice again? Sideways movement and swinging out wide? I don't do donuts so don't see this as relevant

So you drive in a perfectly straight line and follow the apex of a bend? As that's how things such as sat navs and route planners calculate distances.

[TW]Fox · 18 Nov 2018 at 20:58

Dis86 said:
So you drive in a perfectly straight line and follow the apex of a bend? As that's how things such as sat navs and route planners calculate distances.

Unless you're driving to Vladivostok it's not going to be material.

theone8181 · 18 Nov 2018 at 20:59

Dis86 said:
So you drive in a perfectly straight line and follow the apex of a bend? As that's how things such as sat navs and route planners calculate distances.

But that comes out in the wash, as the odometer will see it.

Dis86 · 18 Nov 2018 at 21:09

theone8181 said:
But that comes out in the wash, as the odometer will see it.

Which is why I asked if he's using the odo or a sat nav to measure his distances.

Dis86 · 18 Nov 2018 at 21:17

[TW]Fox said:
Unless you're driving to Vladivostok it's not going to be material.

It could easily be in the region of a couple of percent. Think about the circumference of a 20m diameter roundabout with a standard lane width of 4m. The inner curve is about 63m. The outer circumference 88m. That's a 33% increase.

chanjy · 18 Nov 2018 at 21:18

The apex isn't the inside curve is it

Dis86 · 18 Nov 2018 at 21:19

chanjy said:
The apex isn't the inside curve is it

The apex is the corner point on the inside.

Amleto · 18 Nov 2018 at 21:22

Dis86 said:
Which is why I asked if he's using the odo or a sat nav to measure his distances.

Where? And I use the odo/trip odo.

Dis86 · 18 Nov 2018 at 21:27

Amleto said:
Where? And I use the odo/trip odo.

Dis86 said:
Otherwise if you're going off the trip comp then yeah...pretty far off!

There.

theone8181 · 19 Nov 2018 at 07:41

But my point is that it shouldn't matter whats being used it will be right surely? As to the above poster with mpg issues, it's not some sort of schoolboy error and using US gallons or some sort or rounding error is it?

Cristian · 21 Nov 2018 at 00:02

Does anyone know the real world difference Efficientdynamics would bring on an e92 335D?
I have had an 07 (non ED) 330D in the past so I am reasonably knowledgeable about them, however I remember reading at the time it wasn't any real world difference for my manual 330D.
Looks like the book figures are quite different: 37.7mpg & 200g Co2 vs 42mpg & 177 Co2 on the ED version.

According to HonestJohn, changes include:

Auto Start-Stop (I will not be using this as I don't think it does much favours to a 10 year old car)
Brake Energy Regeneration (can't make much of a difference?)
Active aerodynamics (I assume these are some sort of flaps on the kidney grills?)
Electric power steering (this concerns me, had hydraulic power steering on my e92 330d and the feedback was amazing, the electric one on the F30 330d was very poor)
Optimum gear shift indicator (N/A for an auto)
Low rolling resistance tyres (N/A for a 335d)

My gut feeling that with stop start disabled the real world difference would be zero, is there something I am missing?

[TW]Fox · 21 Nov 2018 at 00:07

Cristian said:
had hydraulic power steering on my e92 330d and the feedback was amazing

Are you sure, I'm pretty sure only the 335s had hydraulic power steering.

Cristian · 21 Nov 2018 at 00:12

I'm 99% sure, simply because having moved from an e46 to an e92 the steering wheel was incredibly communicative on both - you'd get plenty of feedback of what's happening, when you are about to lose grip, etc. Everything was predictable and confidence inspiring.
When moving to the F30 the steering wheel feedback was basically inexistent, you felt what the car was doing through your stomach rather than the steering wheel. Much like my current A4 B8

, although the F30 had tons more grip.

If it was electric, then why on earth did BMW make the steering on the F30 so poor?

LE: seems like it came with two versions, again I am very confident mine was hydraulic.

http://www.realoem.com/bmw/enUS/partgrp?id=WD52-EUR-03-2007-E92-BMW-330d&mg=32

[TW]Fox · 21 Nov 2018 at 00:20

It was electric. Didn't know the F30 was poor though, it's fine in my F10.

Cristian · 21 Nov 2018 at 00:25

See above - on pre LCIs (mine was March 2007, M57TU) it was also available as hydraulic. Found a few pumps on the internet
https://www.ebay.co.uk/itm/Power-St...E92-E93-325d-330d-330xd-DSP1829-/221885792318
https://www.amazon.co.uk/Power-Steering-Pump-Fit-BMW/dp/B01MYPFU0D
I also kind of remember the typical cap of the power steering fluid top up, but it is fuzzy as it might have been the one on the e46.

The F30 was indeed very poor in terms of feedback, although mine also had VSS which apparently doesn't help. Haven't driven an F10, but I will take your word for it.

In any case, looks like the 335D stuck with the hydraulic one (no surprise as it's still the M57 engine even in the 335d LCI, unlike the N57 in the 330D)

hurfdurf · 22 Nov 2018 at 05:12

Never mind found it

Housey · 22 Nov 2018 at 07:59

[TW]Fox said:
It was electric. Didn't know the F30 was poor though, it's fine in my F10.

Fine is subjective, it's hardly the king of feedback. Your old E39 would have been significantly better on that front.

It's interesting to see how people's mindsets change over time. I remember back in the day one of the weaknesses of the E46 M3 compared to say a 996 was steering feel. It was never that good on that front but today people seem to uphold them as good, because compared to today they probably are. My E Class is dire when it comes to feedback. It's perfect for the car but as you speed up it adds weight but not feedback and frankly feels horrible but modern drivers seem to equate that with feedback.

Colleague at work has a real old and tired 996 Cab. Rattly thing, suspension is dead and frankly needs 10K spending on it. He asked me to drive it and give him some thoughts and the thing that struck me most was within 50 yards I remembered just how good steering could be. Same when I drove an old 993 at Silverstone and all modern cars miss that, even the current GT3's. Hard to explain, you just need to go drive one to know it.

sigma · 22 Nov 2018 at 10:09

Housey said:
Fine is subjective, it's hardly the king of feedback. Your old E39 would have been significantly better on that front.

It's interesting to see how people's mindsets change over time. I remember back in the day one of the weaknesses of the E46 M3 compared to say a 996 was steering feel. It was never that good on that front but today people seem to uphold them as good, because compared to today they probably are. My E Class is dire when it comes to feedback. It's perfect for the car but as you speed up it adds weight but not feedback and frankly feels horrible but modern drivers seem to equate that with feedback.

Colleague at work has a real old and tired 996 Cab. Rattly thing, suspension is dead and frankly needs 10K spending on it. He asked me to drive it and give him some thoughts and the thing that struck me most was within 50 yards I remembered just how good steering could be. Same when I drove an old 993 at Silverstone and all modern cars miss that, even the current GT3's. Hard to explain, you just need to go drive one to know it.

I can't find the exact post but my two criticisms of the E46 were the raspy engine at low revs and the lack of feedback through the wheel. Having never driven a true sports car I figured it was because I was used to old Jap cars and French hothatches.