Bought a C250CDi and it feels slow

[HumberMart]

However, if the O/p is only cruising, he isn't using the additional torque the remap has offered, which is how people still manage decent mpg figures after a remap.

It doesn't take a detective to work it out.

To make more torque a diesel engine needs more fuel.
Adding more fuel isn't going to save fuel.
Using more fuel means lower mpg.


Not really hard, is it?

You seem to assume the purpose of a remap is always to increase the torque at the expense of all other variables. Clearly this is not the case. You also seem to ignore the fact that most oem maps are compromised for many technical and marketing reasons and also written to yeild best co2 and mpg data during the eu tests. There are easy gains by most remaps just by ignoring these constraints and real world economy can improve.

 

[Paul/]

However, if the O/p is only cruising, he isn't using the additional torque the remap has offered, which is how people still manage decent mpg figures after a remap.
QUOTE]

Is it possible that some remaps actually reduce torque, and therefore fuel consumption, at cruising rpm, whilst still boosting higher rev output? I.e. shift the peak up the rev range? Though I suppose at the expense of low-end flexibility.

 

[sweeney todd]

Chap bought a car and thinks it's too slow.

Appears to have the resources to swap the car after checking it was indeed the car he ordered.

Umpteen pages later nothing material has changed but he still loves the colour.

Popular thread

 

[markjay]

The switchable chips of old were based on PROM (or EPROM, or EEPROM), these were multi contact large chips that could be soldered piggyback style on top of each other with the switch connected to pin 1 - power - thus effectively switching between the chips on the run.

Modern day ECU use flash memory which resides inside SMT chips and not physically accessible.

Just pointless old-timer trivia...

 

[Colin_b]

My new C250CDI arrives in a fortnight. Should I shoot myself now, or drive the car and then shoot myself?

 

[V12]

Chap bought a car and thinks it's too slow.

Appears to have the resources to swap the car after checking it was indeed the car he ordered.

Umpteen pages later nothing material has changed but he still loves the colour.

Popular thread

Don't say that, people will be after you with pitchforks.

Sent from my GT-I9300 using MBClub UK

 

[sweeney todd]

Don't say that, people will be after you with pitchforks.

Sent from my GT-I9300 using MBClub UK

I'll take my chances

Either it's a good pisstake or the chap's an utter balloon IMHO of course.

 

[Steve C250]

Is this comment is aimed at me?

I've read all the posts on here, and find it amazing that we have such varied levels of understanding, and if I may add, such varied levels of arrogance. And in this post by 'Sweeney Todd' a clear indication of an Internet hardman, or just a unintelligent, nusense who actually adds nothing of value to the thread or of any actual benefit on either argument, maybe just another jealous individual lacking the funds to purchase outright such a car as many of us choose to drive on this forum.

Either way, DM: your comments are repetitive, and I understand your repeated comment about needing more fuel to basically go quicker will therefor lessen fuel economy! At what point did I say that I had my vehicle remapped just for performance improvements? At what point did I say, that when, on the odd occasion I do use the accelerator more forcefully, that I'd expect my fuel economy to be better than the original ecu format?

The bottom line with any remap is all dependant on the users initial request, in my case I went for balance, so to improve economy for long haul, as I do on average 1000 miles per week, and increased pull for when I fancy a brisk flirt with the acceleration.

I have had every performance car I've ever owned tuned to one level or another, these include Porsche 911's, yes the M3, Audi TT's Audi S4's etc etc etc, and ALL from brim to brim when used as I use the car, have given me better economy when driven carefully, and also given more fun when driven hard.

So, to those who require 'evidence' , 'proof' of my obvious gains I'm experiencing, seriously, go annoy someone else. For those who initially posted on here and were most helpful, I thank you, and have enjoyed, until my previous post, being a member of a forum I had assumed and hoped was idiot, sceptic and fool free. Alas, not to be, although I will say it is always the minority that talk b o l l o c k s the loudest most often lol

As for my continued use of this forum, tbh, I've had my fill, (pun) and will delete my account tomorrow evening once you all have time to read this, make of it as you will, and carry on as normal being either generally decent people, helpful and able to communicate on a mature and beneficial level, or like some on here, continue to be confrontational, unhelpful and tbh not the kind of persons I'd prefer to find myself associated with.

Can't wait for the replies, especially from DM and ST hahaha

Regards

Steve

 

[Dr-Nab]

I wouldn't read too much in to it Steve, enjoy your C250, oh and post some pictures I like Fire Opal and would be interested in seeing the carlsson upgrades you've done too

 

[MrVix]

Another ruined thread and another OP who has been disillusioned by the few mindless usual suspects on here. If you have nothing constructive to say on topic why ruin it for others. I strongly suspect the reason is they have nothing else in their lives apart from a clapped out Merc and sitting all night posting rubbish on this forum.

 

[Deleted member 37751]

@Steve C250; don't take it all too personally, you come across as a straight bloke, but if there's someone (and others) that you don't like on here, just put them on your ignore list.

This is a good forum, don't let a small minority ruin it for you.

 

[st4]

Is this comment is aimed at me?

I've read all the posts on here, and find it amazing that we have such varied levels of understanding, and if I may add, such varied levels of arrogance. And in this post by 'Sweeney Todd' a clear indication of an Internet hardman, or just a unintelligent, nusense who actually adds nothing of value to the thread or of any actual benefit on either argument, maybe just another jealous individual lacking the funds to purchase outright such a car as many of us choose to drive on this forum.

Either way, DM: your comments are repetitive, and I understand your repeated comment about needing more fuel to basically go quicker will therefor lessen fuel economy! At what point did I say that I had my vehicle remapped just for performance improvements? At what point did I say, that when, on the odd occasion I do use the accelerator more forcefully, that I'd expect my fuel economy to be better than the original ecu format?

The bottom line with any remap is all dependant on the users initial request, in my case I went for balance, so to improve economy for long haul, as I do on average 1000 miles per week, and increased pull for when I fancy a brisk flirt with the acceleration.

I have had every performance car I've ever owned tuned to one level or another, these include Porsche 911's, yes the M3, Audi TT's Audi S4's etc etc etc, and ALL from brim to brim when used as I use the car, have given me better economy when driven carefully, and also given more fun when driven hard.

So, to those who require 'evidence' , 'proof' of my obvious gains I'm experiencing, seriously, go annoy someone else. For those who initially posted on here and were most helpful, I thank you, and have enjoyed, until my previous post, being a member of a forum I had assumed and hoped was idiot, sceptic and fool free. Alas, not to be, although I will say it is always the minority that talk b o l l o c k s the loudest most often lol

As for my continued use of this forum, tbh, I've had my fill, (pun) and will delete my account tomorrow evening once you all have time to read this, make of it as you will, and carry on as normal being either generally decent people, helpful and able to communicate on a mature and beneficial level, or like some on here, continue to be confrontational, unhelpful and tbh not the kind of persons I'd prefer to find myself associated with.

Can't wait for the replies, especially from DM and ST hahaha

Regards

Steve

I just asked you to measure it brim to brim to check economy so we can get some FACTUAL INFO.

I'm quite curious to see what the real figures are, as your car is quite similar to mine.

 

[V12]

I thought this thread was starting to go down an educational route.

 

[BigSilverEstate]

I thought this thread was starting to go down an educational route.

Heaven forbid!

 

[BigSilverEstate]

No, and neither is the power.

A common criticsm of the 250cdi is its quite laggy and has a short power band, I'd be curious to see if the remapping adjusts boost pressures and the points where the turbos start to come on.

i.e. what the power curve looks like before and after.

Normally with a map, you may expect to see higher peak figures higher up the rev range, at the expense of drivability, but not always.

You think the EGT is going to be sky high?

Given the 250cdi is already in a high tune, I'd be really interested in knowing how they got on with this, and whether the map alters the injection, causing premature wear, overfueling and a big bill for four new ones.

I can't see how the above post could be viewed as 'trolling' or anything other than genuinely interesting questions/observations. Loads of people in here are driving around with some variant or other of this engine and would be interested to know more detail about this (as opposed to all the stuff about the colour of the paint work) but apparently any question at all is a slight to the OP.

As a life long swot I sometimes find it hard to understand how people who cannot, seemingly, understand what they read, write coherently or spell (what is a nusense?), or engage in any kind of sensible discussion without veering into the irrelevant, can achieve a level of success in life that allows them to own and feel entitled to a series of desirable cars. Obviously I was wasting my time with all those exams

 

[Paul/]

For many, this forum is an escape from everyday stress and the rigours of work, and they are seeking enjoyable social interaction.

Some others put a lot of effort in to making compelling and rigorous arguments for their points, but not enough care about how they deliver the message, bearing in mind this forum is declared to be about bringing MB enthusiasts together. We're not in the office. There's no need to be businesslike to the extent of alienating people or sticking rigorously to someone's idea of an agenda.

 

[st4]

I can't see how the above post could be viewed as 'trolling' or anything other than genuinely interesting questions/observations. Loads of people in here are driving around with some variant or other of this engine and would be interested to know more detail about this (as opposed to all the stuff about the colour of the paint work) but apparently any question at all is a slight to the OP.

As a life long swot I sometimes find it hard to understand how people who cannot, seemingly, understand what they read, write coherently or spell (what is a nusense?), or engage in any kind of sensible discussion without veering into the irrelevant, can achieve a level of success in life that allows them to own and feel entitled to a series of desirable cars. Obviously I was wasting my time with all those exams

No I'm curious as a CLS250 shooting brake will be in my life some stage. The high specific output of the engine interests me and I'm curious to know how the 250cdi performs post remap at the pump, mechanically and as a car to drive as the engine has been commented on as peaky.

 

[Deleted member 37751]

(what is a nusense?)

It's how us in the glorious north spell nuisance.

You can PM me for anymore translations if you're stuck.

 

[rothbury]

Another ruined thread and another OP who has been disillusioned by the few mindless usual suspects on here. If you have nothing constructive to say on topic why ruin it for others. I strongly suspect the reason is they have nothing else in their lives apart from a clapped out Merc and sitting all night posting rubbish on this forum.

Yes Mr Vix you're right and I agree with every single word. So that's two thread starters in as many weeks Khamen and Steve C250 who have given up on the forum. Speaks volumes.

 

[V12]

Are you serious or is that tongue in cheek?

***, Dieselman and others were generally factual which is very helpful to those less well educated about remapping.

Steve C250 came back with multiple insults ranging from "nieve and unintelligent" to "mindless and pointless".

If we're not careful we'll start alienating the people who actually offer help and assistance on this forum as apparently they're not good enough at wrapping their factual comments up in cotton wool.