exhaust upgrade & DPF

[ih8ubarney]

I was at the 4by show in bris on the weekend and got a price for a Beaudesert exhaust, one thing they mentioned as I was leaving was, that since it has a diesel particulate filter (DPF) they only upgrade from the filter onwards... and don't touch anything between the engine and the DPF.

this got me thinking if its work upgrading at all.. since the whole point is to help the engine breath better by increasing the exhaust diameter... yet the original exhaust to the DPF is still on the car?

I have zero knowledge in this department so some insight some others would be handy

[Qwerty]

welcome to euro emissions.

DPF basically complicates things a lot as far as I understand.

You'll need to delete it, and run a tune that deletes it from software also (DPF regeneration uses diesel injection into the DPF at various times to burn out the soot).

It's probably illegal.... but unless you get tested I guess they'll not know.

The fines are massive i believe though...

[Gipsy]

What year lux? The 3ltr motor does not have a dpf! Not sure about the new model tho. As to the value of the larger exhaust they do give some benefits i.e. getting the exhaust out quicker and thus reducing heat, and you do get a boost in power/torque.

Check the x-force 3" (google it)

Cheers, G

[Jacko9]

posted in the new 2.8/2.4l? hilux thread mate, has a dpf

[ih8ubarney]

Thanks Qwerty,

probably something to look into after the warranty has run out I don't have my new toy yet, so not yet a problem.

the only up side is the exhaust is cheaper cause we now cant replace some of it!

looking forward to some reviews and dyno graphs to see what is gained.

Gipsy its just for the current 2016 lux

[luxtc]

Are there any exhaust companies releasing a full exhaust system with DPF yet?
I know Taipan XP have released for other car models but can't find anything for the new Hilux.

This is why I hate buying new models!! haha

[Krutch]

Just autos have a 2016 2.8 with full exhaust and no dpf or egr also running different turbo so I read.

[Ryan1kd]

Any links?

[Krutch]

On Facebook I seen it might be there home page

[Hilux Max]

this got me thinking if its work upgrading at all.. since the whole point is to help the engine breath better by increasing the exhaust diameter... yet the original exhaust to the DPF is still on the car?

I have zero knowledge in this department so some insight some others would be handy

Changing the exhaust is not reccomended because during DPF burnoff, much higher EGT's are the result, and I guess they worry if a different exhaust might affect that.

Onwers manual also states to beware during DPF burnoff where you are parked, because of the higher exhaust temps coming out the back and below, that you dont start a fire anywhere.

IMO, it is not worth replacing, as mentioned, fines for DPF shutoff are massive if caught.

Im wondering if its possible to fit a different muffler for some sound, but you wouldnt want it sounding like a "ricer" would ya?

[Ryan1kd]

I read on an np300 page that the dpf was removed and confirmed my original thoughts of because the dpf has a differential valve which measures the different pressures between the turbo and the back of the dpf itself, it shouldn't throw a code or try and regenerate if you block off the fittings. It just always thinks that life is good.

[carjos]

Just some random info, here's a John Deere dpf/doc assembly, in this case the ecu measures pressures and temperatures

Haven't had a problem with them yet as long as the engine is being worked hard enough they passively clean themselves but if they are idled around then they require an operator induced clean out more often

[Talktheroo]

Leave it alone, the exhaust system.
Yep, DPFs are not good for a lot of short trips.
If you have a period of short trips, just go for a ride along a highway somewhere doing about 100 kph for about 20 kms. That will burn off any soot that has settled on the element.
DPF system are a good idea, as this restricts the exhaust gases going through the intake.
EGR valves are only open for a short time at cold start, unlike the KDJ150 model Prados and the KUN26 Hilux late models.
Anyway, welcome to Euro 5.
The Roo.

[Ryan1kd]

Egr block, bash the dpf out. Back to basics. It's a ute.

[flyingdoctor]

Do not bash that dpf out unless you know what you are doing.
Its not just an afterwards added dbf, its part of the engine surveillance system. Just ripping it out will produce funny things at the sensors and, it is euro5, will force the machine into limp mode after some kilometers.
You have to dive into bits and bytes, to tell the ECU that there are no missing or confusing sensor outputs if there is no feedback from the filter unit.

Its complicated.

Tim

[nicebike]

roo and flying doctor are spot on.

The smartest thing to do with the Euro 5 diesel is to leave it alone. Party time for engine mods is over.

[Mrmal]

An interesting article which shows the difference between a Cat and a DPF - which is bugger all......

https://www.dieselnet.com/tech/diesel_exh_pres.php

It states that the flowing of DPF filter is largely dependent on how clogged it is. We do a cat back replacement on the MK7 due to the restrictive nature of the pipe work leading to it from the turbo. The DPF on the MK8 is bolted to the manifold before the turbo so I can't see how the plumbing of it could be terribly restrictive and it probably only presents a marginal back pressure increase over the cat that has to be fitted.

May not be big gains to be had for the expense of deleting it? As above - leave it alone I reckon would be the wise choice.

[180degrees]

To the people who think it's a good idea to delete the DPF, the fine if caught without one is significant, $20k or something last I heard, also it helps the environment ie: it helps to reduce impacts on global warming and air quality within cities, it's worth keeping it in there basically.

[stv091]

I installed the 2.5" muffler delete kit off eBay to mine. It dumps just before the rear axel. Made it marginally louder but seemed to get a bit better throttle response. But then again might just be placebo haha.

[Ryan1kd]

It's bound to do something, I remember it making a reasonable difference with response on my old 06 hilux. I can only imagine the restriction in the dpf. We removed a dpf off a 560hp Detroit western star at work and the driver said it was a new truck. Pulled like a 2 dollar Thai hooker.