[Vwdiesel] CR particulate filter

[James Hansen]

If it's anything like the trucks Chris, you just get a different mandrel
bent exhaust that lacks the trap, and run a tune that lacks the whole trap
functionality. Keep the tune focussed on economy, and not 800hp, you don't
need to  make huge gouts of smoke either.  If there isn't one available just
wait a month, someone will make one.  There's a brisk market in chiptuning
these days, people are sick of awful mileage.

Another good example of an open engine versus a restricted one, is the 97
passat versus the 05.  I get about 48 with the 05, 60 with the 97 with the
egr functional even.  

There is all kinds of pissing and moaning about urea trap technology coming
into diesels in Canada for offroad equipment, but it has to be better than
tier 4 compliant engines that are using 50% more fuel to achieve the same
horsepower because of the cool combustion chamber.  An excellent example of
tier 4 motors is the swather we got last year- a new Deere.  In field
conditions, looking at the downloaded fuel map, it's running at 95 to 100%
capacity over 65% of the time, and over 70% whenever it is being used.  No
wonder it has no power.  The motor even sounds terrible, at no point does it
ever sound like it "opens up" or is producing more torque due to load
condiitons.  It just labours along, underpowered, eating fuel like it was
free.  It's the Escalade of swathers, all show, no go, no mileage.  Dealer
answer at this point is to slap a tune on it, because deere can't officially
sanction a change that would not allow the swather to drive in L.A. They've
been working on it all winter trying to make it work legally.... but I
digress...

-j

 

From: Chris Geiser [mailto:cfgeiser at gmail.com] 
Sent: February-16-11 10:56 PM
To: James Hansen
Cc: vwdiesel at vwfans.com; Travis Gottschalk
Subject: Re: [Vwdiesel] CR particulate filter

 

I wonder if non-particulate filter exhaust manifolds (from early TDIs) would
fit the new TDI's to by-pass / remove that whole system?

CG

**Sent with mobile device.

On Feb 16, 2011 10:50 PM, "James Hansen" <jhsg at sasktel.net> wrote:
> My Dad's 08 duramax has a particulate filter. Particle traps really aren't
> the best thing going. Mileage with: 12 Mileage without: 18. I'm told that
> every 900 km, the particle traps uses 11 litres of fuel to cycle it and
burn
> off the pesky carbon. Seems.... wrong. He promises to never drive it in
> California.
> If you would stop the fuel from going to the particle trap, it would
> eventually plug and be expensive to replace. EGR motors have the
combustion
> temps cooled so much to not make nox, that the trap would never get hot
> enough to clear on it's own. Much better and vastly more efficient to run
> the combustion temps really hot, then deal with the nox with a urea cat.
> -james
> 
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of Travis Gottschalk
> Sent: February-16-11 2:27 PM
> To: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] CR particulate filter
> 
> 
> I don't think you want to stop the fuel from dumping into the particulate
> filter unless you want it to plug sooner robing you of cash (very
expensive)
> and MPG. Only other option is to remove it and install a custom downpipe
> (already being made) and then you HAVE to have a tune as well. But you
would
> want to be out of warranty. They have HUGE HP gains when that is done to
> them. Said thing is that most diesels have this style of particulate
filter
> on them. Our lube trucks on the mine are over the road trucks and we have
to
> drive them on the public road once in a while to activate the regen
process
> as you need to be above a certain speed. I think it is the same on the CR
VW
> diesel as well. 
> Travis G
> 
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