More Power (370bhp)/Less Fuel (47mpg). God love Physics

[Ares]

It's three weeks since I got Schnitzer to take my 640d GC from 310 to 370bhp.

The difference is noticeable, very. (The suspension upgrade likewise).


Finally got through the first (near) full tank since the upgrade. I usually got c600 miles before the low fuel warning (giving c42mpg - car usually showed c43mpg ave on Trip).

This time at 611 miles, I still had 130 mile range, and only got 58 litres in the tank (makes actual mpg about 47......car's trip showed over 48mpg average over that 600 miles.) All over broadly similar mx of driving (and allowing for 'enjoying' the new power)





So more power....and I got better fuel consumption. Begs the question, is the only reason manufacturers don't use the same tune component longevity? Or is it part of future proofing demand?

[smele]

Don't forget the car is designed to work with varying qualities of fuel from around the world, along with massively changing temperatures and altitude. You have just been optimized for the UK.

It's great. I'm not sure what pleased me most, more power, better delivery or more mpg?

[anonymous-user]

You must drive like a total pansie. I'm on 27mpg in my 335d at the moment ;-)

[xjay1337]

Manufacturers don't use the full potential of the engine because of various emissions issues, not to mention quality of fuel across the world.
All turbocharged engines, petrol and diesel, benefit from a proper remap.
Power and economy.
It's a win win.

[anonymous-user]

xjay1337 said:

Manufacturers don't use the full potential of the engine because of various emissions issues, not to mention quality of fuel across the world.
All turbocharged engines, petrol and diesel, benefit from a proper remap.
Power and economy.
It's a win win.

well except for all the people your increased tailpipe emissions kill and the fact more power creates higher loads in the drivetrain, beyond those for which the transmission was designed and leads to early life failures, but yeah, other than that, win win indeed.........

[Ares]

smele said:

Don't forget the car is designed to work with varying qualities of fuel from around the world, along with massively changing temperatures and altitude. You have just been optimized for the UK.

It's great. I'm not sure what pleased me most, more power, better delivery or more mpg?

True - I've used V-Power diesel from the car being 3 months old.

And for me its the power & delivery of....the mpg was just an added, surprise benefit.

[Ares]

Max_Torque said:

You must drive like a total pansie. I'm on 27mpg in my 335d at the moment ;-)

Far from. Especially since the power upgrade. The loud pedal is intoxicating. That said, most of the time, my miles are still stuck in traffic or stuck behind caravans/trucks/horse-boxes/etc.

The only nod to fuel consumption I actively give is to shove the car in EcoPro when sat on the motorway for more than 10 miles or so.

[Ares]

Max_Torque said:

xjay1337 said:

Manufacturers don't use the full potential of the engine because of various emissions issues, not to mention quality of fuel across the world.
All turbocharged engines, petrol and diesel, benefit from a proper remap.
Power and economy.
It's a win win.

well except for all the people your increased tailpipe emissions kill and the fact more power creates higher loads in the drivetrain, beyond those for which the transmission was designed and leads to early life failures, but yeah, other than that, win win indeed.........

Joy of the 640d transmission is that it is designed for far higher loads anyway....and emissions are cited as identical (and lower on Emissions per HP!)

[zeppelin101]

Ares said:

Joy of the 640d transmission is that it is designed for far higher loads anyway....and emissions are cited as identical (and lower on Emissions per HP!)

I'm sure they definitely went to the effort of testing it as per the manufacturer to prove that was the case.

[grayze]

Max_Torque said:

You must drive like a total pansie. I'm on 27mpg in my 335d at the moment ;-)

yup, struggle to get 45 in my 520D daily.

[hondansx]

Ares said:

Max_Torque said:

You must drive like a total pansie. I'm on 27mpg in my 335d at the moment ;-)

The loud pedal is intoxicating.

Steady on! This is a diesel, isn't it?!

Does it retain manufacturer's warranty? If so, certainly no downside!

[Ares]

zeppelin101 said:

Ares said:

Joy of the 640d transmission is that it is designed for far higher loads anyway....and emissions are cited as identical (and lower on Emissions per HP!)

I'm sure they definitely went to the effort of testing it as per the manufacturer to prove that was the case.

Identical transmission used by same manufacturer in engine outputs with same/higher power and torque.

....and the tuner in question undertakes some of BMWs testing for them anyway. Given the whole kit is approved by (and can be supplied/fitted by) BMW....the chance of discrepancies is unlikely.

[luckystrike]

currybum said:

Manufacturers who are willing to spend billions of pounds to gain a a few percent of fuel economygame the emissions regs so their cars achieve the absolute lowest emissions/highest economy in a very specific testing schedule to the detriment of actual tractibility on real roads are not in the habit of leaving easy to achieve benefits out of production calibrations.

ftfy

[sparkyhx]

same here on my 200sx - it was more economical producing 300bhp than it was doing standard 200bhp. that is of course pootling along, not giving it beans.

[Ares]

currybum said:

Ares said:

Joy of the 640d transmission is that it is designed for far higher loads anyway....and emissions are cited as identical (and lower on Emissions per HP!)

Manufacturers who are willing to spend billions of pounds to gain a a few percent of fuel economy are not in the habit of leaving easy to achieve benefits out of production calibrations.

And yet fully manufacturer approved (as well as supplied & fitted) modification is achieving them? (hence my question )

[Ares]

hondansx said:

Steady on! This is a diesel, isn't it?!

Does it retain manufacturer's warranty? If so, certainly no downside!

Yes. And the Schnitzer parts are further covered by their own warranty (with an assurance of shortfall for anything deemed in the middle).

....hence the 3x cost over DMS!

[Ares]

swerni said:

Ares said:

Max_Torque said:

You must drive like a total pansie. I'm on 27mpg in my 335d at the moment ;-)

Far from. Especially since the power upgrade. The loud pedal is intoxicating. That said, most of the time, my miles are still stuck in traffic or stuck behind caravans/trucks/horse-boxes/etc.

The only nod to fuel consumption I actively give is to shove the car in EcoPro when sat on the motorway for more than 10 miles or so.

Hardly a term best used to describe the accelerator on a diesel car.
But then again, maybe it's more appropriate..........

It's a term for the throttle. Accelerator/Go Faster pedal/etc being others.

Keep up at the back of class

[hondansx]

Ares said:

hondansx said:

Steady on! This is a diesel, isn't it?!

Does it retain manufacturer's warranty? If so, certainly no downside!

Yes. And the Schnitzer parts are further covered by their own warranty (with an assurance of shortfall for anything deemed in the middle).

....hence the 3x cost over DMS!

Excellent! Worth the extra outlay for that peace of mind, IMO.

[J4CKO]

remapped versions of the six cyl turbo BMW's must be some of the fastest stuff on the roads these days.

[Ares]

swerni said:

I know what it is.
However it's one of those evocative descrptions that makes one think of booming V8's or roaring V10's not a oil burner going "chug chug chug"

Just makes me think of going faster. Preferably a lot faster.


And I'll not bite on the Chug Chug Chug.

Edited by Ares on Monday 16th March 16:29