CDi DPF tech question

[Smartie81]

Re: CDi DPF tech question

Loads of companies are now offering DPF removal for smart cdi, Celtic Tuning and others.......

[Big Performance]

Re: CDi DPF tech question

Glad you like the map

Popped in to see Stuart and Mr Sceptic (Justin) last night
they are both interested in the out come

[Ian Donkin]

Re: CDi DPF tech question

Mike - I now know you can get all the torque you could possibly wish for beyond say 2,200rpm with a remap and the DPF still in situ however I suspect the flow restrictions the DPF and cat cause prevent the turbo from spooling up at lower revs (and therefore keeps the powerband frustratingly narrow). More exploration to come for sure, but my DPF will be remaining for the next 11 months at least for warranty reasons.

Like you, I'd love to see some numbers on the emissions effect of a decat / DPF removal otherwise the exhaust solution has to invlove keeping the original for one day a year...

[Yamaha1]

Re: CDi DPF tech question

Any idea how that will effect the tested emissions readings when the dreaded MOT comes around, as questioned by Ian Donkin - will it actually pass, do you reckon?
My 09 CDi is out of warranty in a couple of days - and I was thinking maybe a remap - but removing that lot sounds a bit severe for me!!

Mike

[SMARTISH]

Re: CDi DPF tech question

Sounds good... Can you tell us more about your replacement exhaust?

It was very cheap and its not loud. Just unbolted it, cut it open, removed everything, then put a spiral baffle in.

[Ian Donkin]

Re: CDi DPF tech question

Sounds good... Can you tell us more about your replacement exhaust?

[SMARTISH]

Re: CDi DPF tech question

Removing the DPF, and the cat... and deleting the EGR (exhaust gas recirculation) you will be fine on a diesel.

You MPG will be a lot better too.

[Ian Donkin]

Re: CDi DPF tech question

That sounds like it's only a matter of time then before my DPF goes... I'd be interested to understand the before and after emissions number as come MOT time (eventually) that will matter.

[SMARTISH]

Re: CDi DPF tech question

we contacted s2smarts/tune4perf about our cdi, they could not do it, the dpf model had been out about a year, so i was surprised.

We removed the filter and de-cat ourself, then I replaced the exhaust. I then found a guy to map it, (he included dpf cycle removal and EGR delete in the software, and does not charge extra) £150 for the remap, if you need his details tell me.




Its a lot smother at low revs and I think that the EGR software removal, plus no cat and dpf.

MPG is a lot better, I took the car to an independent rolling road, before and after it hit 53bhp before and 72 after, but the torque is ace.

[lalli_d1]

Re: CDi DPF tech question

should have elabourated a bit more on what he could do... and yes i did see the other messages

[Evilution]

Re: CDi DPF tech question

Ian are you saying you can now remove the cycle in the software.

Yes we can

and you can what?

See previous messages.

[lalli_d1]

Re: CDi DPF tech question

It's a silly thing to fit a particulate filter onto a small engined 'city car' like the 451 cdi but it keeps the emissions police happy!

its the guys in the EU that require the fitment of DPF's to cars... be thankfull that you dont live in germany, they HAD to retro fit DPF's to cars build after 2003 in order to drive in big cities. i recall a training instructor down at jaguar saying that they could get the emissions down without the use of the EGR valve(s) but the EU stated that the engine HAS to have them fitted in order for the enging to go in to production

Yes we can

and you can what?

[Big Performance]

Re: CDi DPF tech question

Yes we can

[Greasemonkey]

During the regeneration cycle there are a couple of things I have noted - the tick-over rises to around 1,100 rpm as you suggest, but also you can't change up the gears at very low revs (say, just under 2,000rpm); it needs a few more revs than the usual minimum before it will go up a gear.

I think smart are actually starting to get their act together on the DPF - I had to have an exhaust temperature sensor replaced a couple of weeks ago (due to the engine management light coming on), but since then the car has been significantly better (I've done 2,000 miles in my first month of ownership, so do drive it quite a bit!) and the regeneration cycle can happily continue over several journeys / overnight if it starts during a short trip.

I also like the idea of removing it, but am going to wait and see what happens as I continue to add miles and the engine loosens up further (it only had 1,263 miles on the clock when I picked mine up).

Have to say I love the car though :-)

Many thanks Ian. I had a good drive on Friday evening and it appeared to have been doing a regeneration as I got home (idling at 1100 rpm) so I drove it a bit more to hopefully finish the regeneration off fingers crossed!

Have taken a bit of pee taking by family as I downgraded from a 2.2 cdti Honda civic to this 'go cart' but I am loving every minute of it so far!! I cannot remember a car that has made me smile as much as this little thing does!
It's a silly thing to fit a particulate filter onto a small engined 'city car' like the 451 cdi but it keeps the emissions police happy!

[Ian Donkin]

Re: CDi DPF tech question

During the regeneration cycle there are a couple of things I have noted - the tick-over rises to around 1,100 rpm as you suggest, but also you can't change up the gears at very low revs (say, just under 2,000rpm); it needs a few more revs than the usual minimum before it will go up a gear.

I think smart are actually starting to get their act together on the DPF - I had to have an exhaust temperature sensor replaced a couple of weeks ago (due to the engine management light coming on), but since then the car has been significantly better (I've done 2,000 miles in my first month of ownership, so do drive it quite a bit!) and the regeneration cycle can happily continue over several journeys / overnight if it starts during a short trip.

I also like the idea of removing it, but am going to wait and see what happens as I continue to add miles and the engine loosens up further (it only had 1,263 miles on the clock when I picked mine up).

Have to say I love the car though :-)