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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Sorry more dpf questions



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      01-15-2013, 05:32 PM   #1
markymark34
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Sorry more dpf questions

background - 2007 325d m sport 31k.
If i get a remap, should i get rid of the filter as well or just leave for now? Guess im just slightly nervous of MOT changes and then being screwed.
Anyone had a remap and then later removed the filter? Was it worth it in terms of performace/mpg?

Think the only other mod i will do is the alpine upgrade as the standard stereo is awful.


Cheers

Mark

ps great to be back in a bmw! The Mondeo was a great car for equipment but those who say it drives as well as a bmw need medical attention!
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      01-15-2013, 07:02 PM   #2
Mart1000
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With that sort of miles on it I'd leave the DPF as it is.
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      01-16-2013, 06:09 AM   #3
markymark34
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yes i guess your right, my issue is the 325 is a little sluggish compared to the 330d i had before so i wanted a bit of extra power.
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      01-16-2013, 06:19 AM   #4
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If it was me i would remove the DPF and have a remap. I have only just bought a 330d and will be considering it in the near future.
The only reason i am going to do it is because i seen a post from AMD tuning just off the m25. They deleted the dpf and remapped a 330d it went from 225bhp to 301bhp on a dyno. Thats quite impressive in my eyes, might make my mpg slightly better once its been done with some steady driving
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      01-16-2013, 07:13 AM   #5
ade146
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I have removed my dpf, swirl vanes, egr and remap. Mostly in the name of longevity or to solve issues. Inevitably you solve one issue but create another. I have seen dyno prints around 290 for the 330d with dpf still in place. I would be tempted to leave it all as it is for the time being. Unless you have a dyno map it can be slightly awkward getting a map for a car with lots of bits missing.
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      01-16-2013, 05:23 PM   #6
markymark34
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Decided I'll just go remap for now. That and the alpine upgrade is enough money to spend. Trying my best not to look at any 19" wheels!
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      01-16-2013, 05:54 PM   #7
Mart1000
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Quote:
Originally Posted by Dan-danGT View Post
If it was me i would remove the DPF and have a remap. I have only just bought a 330d and will be considering it in the near future.
The only reason i am going to do it is because i seen a post from AMD tuning just off the m25. They deleted the dpf and remapped a 330d it went from 225bhp to 301bhp on a dyno. Thats quite impressive in my eyes, might make my mpg slightly better once its been done with some steady driving
My previous 330d m sport (2006) was putting out 295.1 bhp after a remap at Evolve. As said, with that sort of low mileage it's better to leave it in place and let it do its job.
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      01-18-2013, 10:01 AM   #8
Dan-danGT
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Mileage in my eyes has nothing to do with it, I will be getting mine gone to reduce back pressure and needless amounts of fuel being burned to regenerate the dpf.
At the end of the day it's your choice, there's no set rule, I can't understand remapping it which will burn more fuel and create more soot, which in turn will block the dpf more frequent and create more regens which will fill it with ash quicker.
As said above its all personal choice just like any mod to your cars. It's to your taste.
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      01-18-2013, 03:27 PM   #9
jacko1971
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E90 330d M Sport 57 plate

Just had my DPF removed cos it was totally blocked. Car had already been mapped to 280BHP but there was definitely a difference once the DPF had been removed. And I mean above and beyond what the original remap felt like. I did have small issue with a "hiccup" last week ( a seconds worth of hesitation on light acceleration) that I thought was maybe because the DPF software hadnt been removed or an issue with the EGR even tho it was cleaned but its never done the same thing since.
They couldnt map out the DPF when they removed it at the garage initially cos the software guy was off so I've been to the original remappers to get it done today and at the same time to get it tweaked in response to the freer flowing exhaust. This new map added approx 15BHP on top of the 285BHP it was originally.
Did 46 MPG on the way back on A roads and over fells over 45 miles and I wasnt dawdling.
The cars awesome. Totally
If the DPF is going then get shot. But if you do the required decent runs on the motorway to ensure the regens get done and arent a speed head then leave alone. But if its performance your bothered about then get rid maybe!
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